Dangerholm’s Scott Lumen eRide XC is the World’s Lightest eMTB

Dangerholm is again with a 12.9 kg (28.4 lbs) construct of the Scott Lumen eRide eMTB, making it the lightest eMTB in existence. That quantity pertains to Gustav Gulholm’s private tackle what a XC-oriented eBike must be; with 130mm journey entrance and rear, the Lumen eRide advantages from the Intend Samurai TR fork, Pi Rope wheels with Duke rims and Nonplus hubs, the TQ-HPR50 motor with CeramicSpeed bearings and a carbon-cased battery, Carbon-Ti brake rotors… to call however just a few of the extraordinary elements which have gone into creating this extraordinary eMTB.

Then, for broader attraction, there’s Dangerholm’s Path model of the Scott Lumen eRide. Out of the field the whole 900 SL construct is available in at round 15.5 kg, excluding pedals. Gustav’s weighs simply 13.93 kg (30.7 lbs). This one is a bit more beefed out to deal with the trials of more difficult path using.

Dangerholm’s bike constructing mastery and unbelievable consideration to element is showcased right here in two of essentially the most spectacular eBikes you’ll see this yr. Who higher to inform the complete story than the person himself?

Dangerholm’s Scott Lumen eRide – The World’s Lightest eMTB

Phrases by Gustav Gulholm

This time the plan was so simple as it could possibly be – construct the lightest doable E-MTB utilizing the SCOTT Lumen as base. Partially out of curiosity, how mild are you able to truly go? But additionally with the imaginative and prescient of making an E-MTB that might really feel very near a daily mountain bike to journey, however with a enjoyable increase on the push of a button.

Easy, but after all fairly difficult. It’s one factor to construct one thing mild, and one other to actually push the bounds and construct the world’s lightest in its class. Particularly so because it nonetheless must be absolutely usable whereas sustaining nice journey qualities, as a result of to me there’s no level in constructing a ”present bike”. Bikes are supposed to be ridden.

With that stated, in the case of upgrades and full customized builds I’ve at all times tried to push the concept that it’s best to construct the bike for your self and nobody else. All of us have totally different preferences, using kinds, rider weight and so forth and this implies you may go in numerous instructions.

One instance of that is after all how mild elements you may “get away with”. And whereas there are maybe surprisingly few elements on this bike with rider weight limits decrease than you usually see, the spec listing is chosen with my very own physique weight and using fashion in thoughts.

However the Lumen is an extremely versatile chassis, being able to all the pieces from pure XC using to the path and downcountry stuff. And pushing the construct to date into XC territory, I figured that I’d as properly get just a few choose additional elements for extra heavy-hitting path obligation and get myself a 2-in-1 dream bike.

I additionally figured {that a} tremendous mild and enjoyable centered path construct could be one thing extra riders may relate to personally, so it will be cool to point out that aspect of the Lumen as properly.

And this is the reason you’ll discover not simply the 12.90 kg report weight model offered under but additionally a path/down nation model of the exact same bike. And if I could say so myself, at round 14 kg that could be equally spectacular contemplating the kind of using it might deal with.

Body

For these of you not aware of the SCOTT Lumen eRIDE sequence, it’s basically the e-bike model of the SCOTT Spark. Except for having the rear suspension journey bumped up from 120mm to 130mm, and a barely totally different form to accommodate the TQ drive unit and battery system, it shares the geometry and lots of the options. Most evident is after all the absolutely built-in rear shock, however you additionally for instance see the simply adjustable headset cups to vary the top angle.

Impressively sufficient the amount of the body is simply 17% greater than on the Spark, and that quantity alone tells you that it is a very discreet wanting e-bike.

In true SCOTT trend additionally it is very mild weight. Stripped from paint (which was round 150g) it weighs simply 2,072g together with {hardware}. Even after including the rear shock and rear axle it’s an especially aggressive weight for a path e-bike body.

As for the paint stripping itself, I desire to do a lot of the work utilizing knives when the tip objective is a uncooked carbon fiber floor. This fairly actually sounds very brutal however accomplished accurately it’s a really secure technique. It’s not quicker than sanding, but it surely permits me to take away all of the primer and doable filler with minimal affect on the carbon fiber. Actually, since I’m so cautious you may even nonetheless see scratch marks from a few of the sanding accomplished on the manufacturing unit when the body comes out of the mould.

Evidently although, eradicating the paint out of your body will not be inspired by SCOTT or another bike producer for that matter. It would at all times void all warranties, and could also be harmful if accomplished incorrectly.

Out of the field the whole Lumen eRIDE 900 SL is available in at round 15.5kg excluding pedals.

Suspension

Hidden contained in the body sits a distant managed 3-position RockShox NUDE 5 RLC3 rear shock from a SCOTT Spark RC, which I changed the inventory Fox shock with attributable to its barely decrease weight. The Fox comes with an even bigger air chamber and is extra path oriented, making it the logical alternative for the inventory Lumen, however the RockShox continues to be an excellent performing shock. And saving near 40g it made sense for this particular venture.

Up entrance you discover an Intend Samurai TR 130mm fork. At 1,537g it’s so far as I do know the lightest 130mm fork presently in the marketplace, however there’s much more to it than simply low weight.

Intend is a small firm out of Germany, and was for a very long time run as a one-man present by the founder Cornelius Kapfinger. From the very starting, upside-down forks had been the primary product as a result of he was a agency believer in the advantages they provide.

Considered one of these advantages is definitely particularly appropriate for e-bikes which are typically heavier and see larger masses than regular bikes: the crown part which turns into tremendous sturdy due to its greater proportions. So whereas the Samurai is marketed as a XC/Path fork it has been examined to method more durable requirements. Different advantages of such a fork design is for instance nice lubrication, decrease unsprung mass and fewer binding throughout heavy compressions.

As for upside-down forks having a bit extra wheel flex than typical forks, properly, that is the place it comes down to non-public desire. As for myself, I believe it’s a great factor for efficiency. That tiny little bit of flex permits the entrance wheel to trace and comply with the terrain higher, that means there’s much less probability of getting pushed off from rocks and roots. This ends in higher grip and a smoother journey with much less arm pump.

However, if you need an extremely stiff bike or for those who’re a heavy rider who loves nothing higher than pushing berms within the bike park, then perhaps they’re not for you. As soon as once more, for those who’re constructing a customized bike for your self it’s best to optimize it in your using and pleasure. The TR model comes with Intend’s personal cartridge, not that includes any lockout or distant.

Drive Unit

Now we’re actually attending to the guts of the bike – the TQ HPR50 drive unit.

To my huge luck I used to be capable of work intently with the extremely passionate group at TQ for this venture, leading to a brilliant mild one-off setup with zero compromise in efficiency.

However let’s begin with the already spectacular inventory HPR50 because it’s such a vital a part of the Lumen. Because the title suggests, the drive unit has a 50Nm max torque which is greater than sufficient for lots of riders and forms of using. It has a really easy and good energy supply, however what’s actually cool is how silent it’s and the way little you discover it with the help turned off. You possibly can barely hear it in any respect even at max output, and also you’d have a tough time in a blind check to inform that it’s there when using above the max assisted velocity or with the system turned off.

It comes with a 360Wh battery hidden contained in the down tube, with an elective bottle-style 160Wh vary extender. The system can after all be configured and personalised through the TQ app.

The TQ HPR50 already is likely one of the most compact and light-weight drive unit methods in the marketplace, so how do you enhance what’s already nice? That is the place the TQ group got here in, with a little bit of assist from CeramicSpeed and METI.

To begin with, the bike was upgraded with a lighter than inventory important cable. Then the really subsequent degree tuning started.

As a R&D venture TQ got down to make a one-off carbon fiber housing for the inner battery, full with correct shielding and so forth. The result’s a battery that retains its 360Wh capability however weighs 206g much less. A major instance of the most effective form of weight saving, the place you lose zero efficiency.

As a bonus it additionally seems to be completely lovely, and it’s fairly the disgrace to cover it away contained in the body.

The HPR50 drive unit additionally bought to see some prototype one-off tuning, with all of the bearings being changed with CeramicSpeed bearings particular to this venture. Not solely does it barely assist with effectivity and making the bike really feel much more like a daily bike, but it surely additionally saves a whopping 40g.

Lastly, the Italian titanium professional METI manufactured customized hole titanium mounting bolts for it. Virtually half the burden of the inventory metal bolts, with 32g versus 63g. All in all of the tuned TQ-HPR50 system on this bike is available in at 3,783g, with an additional 26g for the distant.

Drivetrain and Shifting

One other space the place I knew there was weight to be saved, was the drivetrain. Early on I made a decision to go for 11-speed, because it’s light-weight and in my very own opinion loads of gears contemplating it’s an e-bike. My authentic concept was to make use of a carbon-tuned mechanical derailleur since it will be the completely lightest, however because it felt a bit outdated for such a contemporary bike I began wanting into an digital resolution.

This led me to give you a really distinctive, and fairly experimental, derailleur setup. In essence it’s two totally different derailleurs mixed into one.

The principle base is a SRAM RED AXS XPLR 12-speed derailleur. That is the place the parallelogram comes from, in addition to the “b-nuckle”, which is the half that bolts onto the hanger and the size of that is a part of what decides who huge of a cassette the derailleur can deal with. On this case it has a 10-44T most cassette vary capability.

However learn how to make it 11-speed? That is the place it turned actually difficult, as I didn’t simply need to mechanically restrict a 12-speed derailleur and danger harm down the highway.

The answer got here to make use of a “p-knuckle”, which is the black composite half housing the electronics and clutch system, from the up to date SRAM RED eTap 11-speed highway derailleur. It bought an entire overhaul a few years in the past, and now options the identical outer dimensions and Orbital Clutch system because the 12-speed XPLR. However the internals is what makes it 11-speed.

So I merely (ahem…) took each derailleurs aside and made one distinctive wide selection 11-speed derailleur out of them to make use of on this bike. And within the course of I gave it a brushed regarded and a little bit of Dremel motion.

It must be acknowledged that whereas I bought it to work alone bike, it’s extremely experimental and naturally guarantee voiding customized setup. The whole lot matches collectively completely as such, but when I’ve accomplished my residence work accurately there’s an ever so small distinction in cassette spacing between the 2 methods. This might end in setup points and probably shortened drivetrain put on life.

In case you’re an actual tech nerd you’re most likely asking your self by now: How did he get an eTap derailleur system to shift on a flat bar mountain bike?

Fortunately for me these eTap derailleurs turned suitable with the most recent AXS highway shifters and extra importantly, the most recent SRAM AXS BlipBox, throughout this product replace.

So, for shifting I’m operating a Zirbel Tornado WE05 controller which is plug-and-play with the BlipBox. These tremendous cool little controllers are available a number of variations, and regardless of their minimalistic look they’re truly extremely ergonomic and simple to make use of out on the paths.

The shifter ring rotates on a bearing, and the clicking mechanism is small however has sturdy magnets. This provides the Twisters a bit extra “journey” in comparison with different digital controllers, making the motion very distinct whereas nonetheless feeling extra pure like conventional mechanical shifters.

The SRAM BlipBox itself is then hidden contained in the body, simply behind the steerer tube, wrapped in foam to maintain issues good and silent.

The cassette is one other considerably experimental half, because it’s an early manufacturing pattern from an Asian model known as SixWheel. They’re presently transforming their catalogue with up to date designs and sizings, so I received’t go an excessive amount of in depth at this level. However shifting is easy, it’s a high-end and positively costly product and it’s additionally extremely mild. The chain is a PYC 1101 SL.

On the entrance there’s the tremendous mild ethirteen espec Race Carbon crank arms in 170mm size. These the place additionally stripped from paint, revealing an attractive and tremendous cool wanting 3k carbon weave end and introduced the burden right down to 328g.

The chainring is one other prototype half. Having used Garbaruk chainrings for a few years now with nice outcomes, I reached out to them to examine if it will be doable to make a TQ suitable direct mount chainring for this bike. To no huge shock, they got here again with a completely lovely chainring that’s half the burden of the usual spider setup.

In case you take a more in-depth look you’ll see that the spokes truly develop into the broad enamel, that means that each dimension incorporates a totally different variety of spokes. You’ll see extra of this design sooner or later because the plan is to supply it for their very own cranksets, however I certain hope that e-bike variations will hit the market as properly.

When going for the completely lowest weight, few pedals can beat the tried and examined Crankbrothers Eggbeater 11 Ti SL which is what I’m utilizing for this XC model of the bike.

Wheels

At simply 945g these Pi Rope wheels that includes Duke rims and Nonplus hubs usually are not your bizarre e-bike wheels.

Because the title suggests, Pi Rope doesn’t construct their wheels with typical metal spokes however as a system with artificial fiber rope spokes. Holding considered one of these spokes in your hand feels utterly surreal, as they really feel identical to any tremendous mild string and also you actually can tie a knot with one. On the similar time these Vectran fiber spokes have a better tensile energy than a traditional metal spoke.

The hubs are one other German creation, from the reasonably new model known as Nonplus. Not solely are they a few of the lightest hubs in the marketplace normally, however their distinctive freewheel mechanism that includes a ratchet system with a a lot greater than regular contact floor space makes them the lightest you will get for an e-bike.

The Pi Rope model incorporates a particular spoke drilling, however for comparability their conventional J-bend spoke hubs weighs simply 167g and 86g, respectively. It is a 50g or extra weight discount on the rear hub alone in comparison with most different hubs on the market.

To finish the wheels you discover the DUKE Fortunate Jack SLS4 Extremely 28 rims. That is the fourth light-weight technology of the French model’s XC oriented rim, and Extremely signifies that it’s the lightest model supplied. The non-Extremely rims tip the scales barely larger however then again comes with a better 110kg max system weight restrict.

28 signifies that it’s the 28mm inside rim width model, which is a bit lighter than the 30mm Fortunate Jack’s. Personally I don’t thoughts the marginally narrower width, in actual fact I believe there’s rather a lot to this dialogue. For instance I like using my downhill bike with 25mm inside width rims simply due to the sensation you get out of the bike, however as soon as once more this stuff come down to non-public desire.

For tires I went with the Kenda Rush Professional TR in 2.4” width. A few of you could be shocked to see Kenda tires on one of the high-end bikes ever, however the model has really stepped it up in recent times and now provide some very fascinating thread patterns in numerous casings.

The Rush is the all-round XC tire with low rolling resistance mixed with first rate dimension aspect lugs for cornering grip, and the burden is a formidable 620g. I even have an elective Kenda Karma 2 with a grippier tread sample to make use of as entrance tire, and in case you’re heading into notably tough terrain these tires additionally are available a strengthened SCT casing model.

The bike is especially setup tubeless with Syncros Eco Sealant, which I’ve had good luck with up to now. However for those who really need to rely grams I even have some Revoloop Extremely MTB tubes for it, which truly places the full weight of the bike right down to 12.85kg. These usually are not simply extremely mild but additionally tremendous compact making them the proper spare tube to carry in your journey.

However generally, for instance when having huge coaching blocks of using in simpler terrain, I nonetheless use tubes on my XC and gravel bikes after which these are a fantastic alternative.

Brakes

The world’s lightest e-bike after all wants the world’s lightest brakes, that are the Trickstuff Piccola Carbon. However the most effective half with these, together with the amazingly easy and good lever really feel, is that they’re additionally a few of the extra highly effective 2-piston brakes obtainable.

Having the bottom weight whereas sustaining high efficiency is a uncommon feat, and as a bonus the absolutely machined design may be very lovely as properly.

One fascinating element is the Flat Mount entrance C22 caliper, made doable for MTB use due to the Intend fork. It offers a really clear look, and is ever so barely lighter.

Italian model Carbon-Ti makes the really distinctive brake discs, known as X-Rotor SteelCarbon which I run in 180mm entrance and rear dimension. One other incredible wanting element, that I’ve in actual fact been dreaming about for years.

The carbon fiber service is after all tremendous mild, that means you can have extra materials within the metal braking floor than on an equal weight conventional brake disc.

On the XC model of the bike I’m operating the 2nd technology of those, put in with Carbon-Ti titanium bolts. The Path model options the third and newest, simply launched, technology which has seen some small modifications. There was some optimizing of the design, in addition to the discs getting rounded edges on the metal part. These are additionally now obtainable with middle lock adapters, which is why you see them on Syncros wheels setup additional under.

In case you’re fearful about seeing carbon components in a brake system, these discs are literally very properly confirmed and likewise being raced on the highest degree in for instance Tour de France seeing riders hit 100km/h earlier than slamming on the brakes.

Cockpit

Beginning with the headset, I’m operating the usual Syncros cups, however with a CeramicSpeed SLT higher headset bearing. SLT is brief for Stable Lubrication Know-how, that means that there’s no conventional grease contained in the bearing however a strong plastic polymer filling. Which means there’s no grease that may get pushed away or dry out, and as such no dust can enter.

When you may assume that these are ceramic bearings, they’re truly absolutely created from chrome steel as they deemed it finest on this utility. All in all it ought to provide a really lengthy and basically service free bearing life.

The decrease bearing has been modified to an Extralite UltraBottom bearing package which saves weight.

On high there’s a Darimo Epsilon one-piece handlebar unit in 740mm width and 70mm stem size weighing a mere 174g. Made in Spain, these are a few of the lightest handlebar setups you will get.

Whereas they’re supplied in quite a few stem lengths and angles, the actually cool factor is that anybody can customized order these to swimsuit their very own preferences. Need the lightest doable? No downside. Bolstered for a heavy rider? No downside.
They’ll make a customized carbon layup relying on the shoppers wants, which is a uncommon and very nice service to see.

The very mild and really cool wanting high cap is definitely the primary take a look at my Dangerholm Signature high cap from German CNC-experts RadoxX. It weighs simply 4g partly due to a hole particular made bolt, so hold a watch out for extra on this and lots of different particular components to comply with.

Grips are Extralite HyperGrips which weigh simply 11.8g together with the tip plugs and are glued (wood glue or hairspray from my punk hair fashion days…) on to remain in place.

The rear shock distant on the left aspect of the handlebar is a custom-made Scott Twinloc.

Seat Publish Combo

Up high there’s an MCFK full carbon fiber saddle in 130mm width. That is truly considered one of my all time favorites and I first used it again in 2017. When you may assume that such a saddle may be very uncomfortable and like sitting on a rock, this couldn’t be farther from the reality.

The skinny carbon fiber saddle shell truly gives a whole lot of flex, very like an old-school leather-based saddle, and you may simply press it down utilizing your thumbs to check it. One other profit is that the carbon floor signifies that your bibs or shorts will slide on the saddle when pedaling, reasonably than creating friction and probably chafing your physique.

The seat submit comes from Swiss YEP Parts and is named Podio that includes 80mm drop. This may be shortened so the burden normally varies between round 320-340g relying in your setup, making it one of many lightest in the marketplace. The dropper motion is extraordinarily easy and simply actuated, and you may simply disconnect the cable interface from the seat submit for those who for instance must take away it when touring.

A small however spectacular element is the SUB4 seat clamp from Darimo. As minimalistic because it will get, it weighs lower than 4g and nonetheless permits for five Nm of bolt torque.

To complete the construct package there’s a bottle cage from CarbonWorks. Because of the intelligent design with hole carbon fiber tubes, which has a rubber coating to fight abrasion put on, it weighs simply 9.6g together with the bolts.

The Path Model

As talked about earlier I additionally determined to construct a extra succesful and enjoyable oriented path or downcountry model of the bike. Whereas the loopy mild XC spec for certain appears like a rocket, it makes a whole lot of sense to go for a extra all-round construct on an e-bike. However after all the objective was nonetheless to maintain weight to a minimal, and the result’s a 13.94-14.04kg path bike relying on tire setup.

The modifications are the next:

• Wheelset: At 1,256g the Syncros Silverton SL wheels are nonetheless featherweights however on the similar time surprisingly sturdy and sturdy. The total carbon development, with carbon spokes the place the fibers go from one aspect of the rim all the best way over to the opposite, makes them very distinctive wheels for a mountain bike. The edges, spokes and hub flanges are molded in a single step with the hub part then inserted which creates pressure within the spokes. Their stiffness and centered weight makes them extraordinarily responsive and enjoyable to journey.

• Tires: I’ve two important tire setups for this spec. First is the Schwalbe Depraved Will in 2.4” width as you see pictured. To be sincere it’s partially as a result of they appear wonderful in opposition to the uncooked carbon fiber with their skinwall fashion, however they’re additionally fairly mild and superb using tires. Particularly with the tender compound model up entrance. Then there’s the Kenda Karma 2 2.4” in SCT casing. These have in my view an excellent all-round thread sample, the SCT casing supplies a whole lot of sturdiness and as a bonus they’re barely lighter as properly bringing the burden right down to 13.94kg. Each are setup tubeless with Syncros Eco Sealant.

• Cockpit: To have extra enjoyable on the downhills and a extra relaxed place on the bike, I needed a barely shorter, taller and wider handlebar setup.

The handlebar is an MCFK 10mm riser in 760mm width. This XC and Path centered handlebar is available in an attractive weave end and can be supplied in numerous flat in addition to 20mm and 30mm rise choices. The stem is the Extralite HyperStem in 60mm size and a 6 diploma constructive angle. The entire combo weighs 186.7g.

• Drivetrain: To supply a greater and extra confidence inspiring using expertise I’m operating Xpedo Baldwin pedals, which have a extra distinct clip-in mechanism and naturally provide extra assist than the Eggbeaters. At 358g they’re nonetheless fairly mild, and I even have a set of Crankbrothers Mallet E 11 Ti which truly are slightly bit lighter whereas having a fair greater platform. I’m presently operating this setup with the marginally heavier however properly confirmed 11-speed SRAM XX1 10-42T cassette.

• Seat submit: 80mm drop is on the shorter finish of the spectrum, so for the path model I put in a 150mm Fox Switch SL. Having simply two mounted positions it’s a bit totally different in comparison with most different dropper seat posts, but it surely works very properly.
  We’ll see nevertheless sooner or later if I’ll take the burden penalty and select to run a daily Switch in 175mm simply to get a bit extra drop and the choice to run the seat barely lowered when pedaling very technical terrain.

Abstract

Ultimately this construct exceeded my already excessive expectations, each within the weights that had been achieved and likewise in how extremely enjoyable this bike is to journey.

It feels a lot like a daily bike and I dare say that many would have a tough time, if not unimaginable, to inform that it’s an e-bike when using it with out the help. And this was additionally an idea I actually needed to push with this construct, to maybe change individuals’s notion about e-bikes slightly bit. That an e-bike doesn’t need to be “unrideable” for those who run out of battery, and that you simply throughout a journey can decide to simply have the help turned on while you really feel prefer it.

Positive at this level it is a customized constructed one-off bike, however I’m guessing that sooner or later we’ll see one class of e-bikes going far into this path.

And by the best way, the unbelievable TQ-HPR50 drive unit already gives this which I’m certain riders on inventory SCOTT Lumen and different bikes are having fun with already as I write this. As for myself I used to be really amazed how a lot allow you to get out of “simply” 50Nm, and I’d say that is greater than sufficient for loads of riders.

All in all, my SCOTT Lumen eRIDE 900 SL ended up being a factor of goals. So is the inventory mannequin, however this construct takes one thing already nice and pushes it to the subsequent degree.

And if I could say so myself, the path model particularly is one superb wanting bike…

Weights together with pedals:

XC Model:
12,85kg with tubes
12.90kg tubeless

Path Model:
13.93kg with Kenda Karma 2 SCT 2.4”
14.04kg with Schwalbe Depraved Will 2.4”

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