Dangerholm’s Scott Lumen eRide 900 SL: Fun at the Extreme

Opinions differ about Gustav Gullholm. The bike tuner with the pen name “Dangerholm” is considered one of the most colorful figures in the bike scene. He is a specialist when it comes to transforming a series model into a freaky, usually extremely lightweight custom bike. The results of his work are currently viewed by around 175,000 followers on his Instagram channel.

Superfluous playfulness or playful art?

Some look at the pictures and afterwards think about how much better could have been done with the money Dangerholm puts into his bikes. A wheelset for just under 3,000 euros, a handlebar for 600 euros, a suspension fork for 1,800 euros – all this is part of the man’s livelihood. Often he also works on the components to reduce their weight again or to create a special look. In the process, of course, any warranty for the component expires, so that it should actually no longer be ridden. The name Dangerholm is no coincidence. At least he himself usually points out that an imitation should be well considered, is in no way in the sense of the manufacturer and is always at one’s own risk. Nevertheless, the question arises as to how helpful it is to put together a bike that may not be rideable or, in the end, may simply be far too precious to be chased over trails and roads after all.

The answer of his fans to this is, for example, because the appeal lies precisely in this exaggeration. In the craftsmanship that Dangerholm undoubtedly brings to the table. In his feeling for the interaction of components. And in his creativity, in playing around with what other manufacturers have already thought of.

On to the record

One of his fans is obviously the bicycle manufacturer Scott. Dangerholm has taken many a model from their range and redesigned it. Now, for the first time, an ebike. His latest challenge was to turn the Scott Lumen eRide 900 SL into the lightest full-suspension cross-country mountain bike in the world. And do it in a way that would make it fully operational.

By his own admission, Dangerholm must have had a lot of fun with the endeavor. In a press release originating from Scott, he talks about how he wanted the project to change people’s attitudes toward ebikes as such. And he did so in two ways. First, that he’s setting up something that very few people realize at first glance is actually an ebike. And secondly, that an ebike doesn’t lose any of its riding fun when the battery is empty. In the end, the result exceeded his own already high expectations. It’s not quite clear which result he means. Because in his zeal, Dangerholm didn’t leave it at just one custom bike. Starting with the Scott Lumen eRide 900 SL, he designed another trail/down country version in addition to the XC model.

For this post, we’ll limit ourselves to the cross-country version originally requested by Scott. Dangerholm slimmed that down from a starting weight of 15.5 kilograms to 12.9 kilograms. Unfortunately, the press release is silent on the cost of the build. We briefly describe where and how the tuner has lowered the mentioned weight. Where it is stated, we mention the weight savings resulting from the work step.

1. Frame
2. Suspension system
3. E-drive
4. Drivetrain and gears
5. Wheelset
6. Brakes
7. Cockpit
8. Seatpost
9. Dangerholm’s Scott Lumen eRide 900 SL in detail
10. Dangerholm’s Scott Lumen eRide 900 SL in the trail version

1. Frame

From the frame, made of carbon fiber, Dangerholm has scraped off most of the paint with knives in his typical style. This takes longer than sanding, but gives him the option of removing all the primer and any fillers with minimal impact on the carbon fiber.
Weight savings: about 150 grams

2. Suspension system

From a Scott Spark RC, the tuner “borrows” a remote 3-position RockShox Nude 5 RLC3 shock and swaps it for the original Fox shock.
Weight savings: almost 40 grams

For the fork, he switches to the Intend Samurai TR. To his knowledge, this is the lightest suspension fork with a travel of 130 millimeters that is currently available. The upside-down fork weighs just 1,537 grams. However, it also lacks a lockout and a remote control.

Intend Samurai TR suspension fork

3. E-drive

The research and development team from motor manufacturer TQ lent a hand in slimming down the ebike system. It developed a lighter main cable than on the production model. The battery was given a carbon fiber housing.
Weight savings: 206 grams

All bearings on the motor were replaced with special bearings from CeramicSpeed.
Weight saving: 40 grams

In addition, the standard steel bolts were replaced with hollow titanium mounting bolts from the Italian titanium expert Meti.
Weight savings: 31 grams

4. Drivetrain and gears

The gearing clearly shows Dangerholm’s own thought processes. He opted for a derailleur with eleven gears instead of the standard twelve. However, he did not go for a ready-made solution. Instead, he took parts from a Sram Red AXS XPLR 12-speed derailleur and a Sram Red eTap 11-speed derailleur and combined them to create his very own 11-speed rear derailleur. As a shifter, a Zirbel Twister WE05 is used.

Rear derailleur custom designed from two Sram rear derailleurs

As a cassette, the Asian manufacturer SixWheel provides an early production sample, which is not even in series production. Over the Garbaruk as a single piece manufactured directly mountable chainring runs a PYC 1101 SL chain.

On the e*thirteen e*spec Race Carbon crank with a length of 170 millimeters Dangerholm has also removed the paint.
Weight saving: 328 grams

e*thirteen e*spec Race Carbon crankarms

Unknown is how much he saves with CrankBrothers Eggbeater 11 Ti SL pedals compared to stock models.

5. Wheelset

Among the noblest and at the same time most modern components on this record bike are certainly the wheels from Pi Rope. They weigh a remarkable 945 grams. Among other things, spokes made of synthetic fiber ropes are responsible for this. The hubs come from the still fairly new German brand Nonplus. The rims are Duke Lucky Jack SLS4 Ultra in the size 28 inches. The tire choice seems unusual. Dangerholm has chosen the Kenda Rush Pro TR in the width of 2.4 inches. At least their weight of 620 grams proves him right.

Duke Lucky Jack SLS4 Ultra 28 rims

6. Brakes

Anyone who is more intensively involved in tuning bikes themselves will probably be familiar with the Trickstuff and Carbon-Ti brands. On the Scott “DangerLumen” Trickstuff Piccola Carbon two-piston brakes are installed. In addition, there are the X-Rotor SteelCarbon brake discs from Carbon-Ti in the size of 180 millimeters. The associated bolts are made of Carbon-Ti-Titan.

7. Cockpit

For the headset, the standard Syncros cups remain in the frame. Only the bearings have been replaced. The upper one comes from CeramicSpeed, the lower one from Extralite. The Ahead cap is a custom made for Dangerholm by German CNC experts RadoxX. Thanks to a hollow bolt it brings it to just four grams.

Immediately eye-catching is the handlebar stem unit Darimo Epsilon handlebar. Although 740 millimeters wide and 70 millimeters long, it weighs just 174 grams.

Darimo Epsilon handlebar-stem unit

If you’re looking for something that can be transferred from this extreme example to your own bike as cost-effectively as possible, we clearly recommend the grips. They cost less than 20 euros, are made of foam and weigh only 11.8 grams, including the end plugs. It’s best to glue them to the handlebars, just like the tuner, to prevent them from slipping. This can be done with wooden glue or hairspray, for example.

8. Seatpost

On the other hand, the saddle does without foam and other softer materials. The model of MCFK consists entirely of carbon fiber. According to Dangerholm, the flex of the seat feel strongly reminiscent of a conventional leather saddle.

Carbon is also the material of choice for seatpost and seat clamp. The Podio post from Swiss YEP Components offers a travel of 80 millimeters. You can even shorten it, resulting in a weight of between 320 and 340 grams, depending on the length. Even in comparison, the four grams for the saddle clamp from Darimo seem almost ridiculous. Nevertheless, you can tighten their bolts with a torque of five Newton meters.

Darimo SUB4 seat post clamp

The bolts for the bottle cage probably don’t need that much. The filigree construction of CarbonWorks weighs only 9.6 grams including the rubber coating against abrasion and the bolts.

CarbonWorks bottle cage

9. Dangerholm’s Scott Lumen eRide 900 SL in detail

• Frame: Scott Lumen 900 SL, Large
• Fork: Intend Samurai TR 130 mm
• Rear shock: RockShox Nude 5 RLC3
• Headset: Syncros + CeramicSpeed SLT + Extralite UltraBottom
• Top cap: RadoxX Dangerholm Signature
• Spacers: Extralite UltraStar 4
• Handlebar: Darimo Epsilon 70 mm x 740 mm, 12 degrees
• Grips: ExtraLite HzperGrips
• Saddle: MCFK Saddle, 130 mm
• Seatpost: YEP Podio, 80 mm
• Seat clamp: Darimo SUB4
• Dropper remote: YEP JoyStick
• Crankarms: e*thirteen e*spec Race Carbon, 170 mm
• Chainring: Garbaruk 34T, Custom made for TQ HPR50
• Pedals: Crankbothers Eggbeater 11 Ti
• Chain: PYC SL
• Cassette: Sixwheel 10-44T, 11-speed
• Rear derailleur: Sram Red XPLR Special with CeramicSpeed OSPW
• Shifter: Zirbel Twister WE03 + Sram BlipBox
• Cables: Jagwire
• Brakes: Trickstuff Piccola Carbon
• Brake discs: Carbon-Ti X-Rotor SteelCarbon 2, 180 mm
• Brake disc bolts: Carbon-Ti Titanium bolts
• Brake hardware: Extralite rear, Intend front
• Wheels: PI Rope Light + Nonplus + Duke Lucky Jack SLS4 Ultra 28
• Rim tape: OrangeSeal
• Valves: No name
• Tires: Kenda Rush Pro TR 2,4″
• Sealant/ Tubes: Syncros Eco/ RevoLoop Ultra
• Bottle cage: CarbonWorks
• Ebike drive system: TQ HPR50 custom, Meti titanium screws + CeramicSpeed
• Total weight: 12.90 kg

At the aforementioned trail / down country version of the Scott Lumen eRide 900 SL Dangerholm has made changes to the wheels, tires, cockpit, drive and seatpost. As a result, the weight increases to pretty much 14 kilograms.

Scott Lumen eRide 900 SL ebike by Dangerholm in trail mountain bike version

10. Dangerholm’s Scott Lumen eRide 900 SL in the trail version

• Frame: Scott Lumen 900 SL, Large
• Fork: Intend Samurai TR 130 mm
• Rear shock: RockShox Nude 5 RLC3
• Headset: Syncros + CeramicSpeed SLT + Extralite UltraBottom
• Top cap: RadoxX Dangerholm Signature
• Spacers: Extralite UltraStar 4
• Handlebar: MCKF 10 mm Riser 760 mm Extralite HyperStem 60 mm
• Grips: ExtraLite HzperGrips
• Saddle: MCFK Saddle, 130 mm
• Seatpost: Fox Transfer SL 150
• Seat clamp: Darimo SUB4
• Dropper remote: YEP JoyStick
• Crankarms: e*thirteen e*spec Race Carbon, 170 mm
• Chainring: Garbaruk 34T, Custom made for TQ HPR50
• Pedals: Expedo Baldwin
• Chain: PYC SL
• Cassette: Sram XX1 10-42T, 11-speed
• Rear derailleur: Sram Red XPLR Special with CeramicSpeed OSPW
• Shifter: Zirbel Twister WE03 + Sram BlipBox
• Cables: Jagwire
• Brakes: Trickstuff Piccola Carbon
• Brake discs: Carbon-Ti X-Rotor SteelCarbon 2, 180 mm
• Brake disc bolts: Carbon-Ti Titanium bolts
• Brake Hardware: Extralite rear, Intend front
• Wheels: Syncros Silverton SL 30 mm
• Valves: No name
• Tires: Schwalbe Wicked Will 2,4″, optional Kenda Karma 2 SCT 2,4″
• Sealant: Syncros Eco
• Bottle cage: CarbonWorks
• Ebike drive system: TQ HPR50 custom, Meti titanium screws + CeramicSpeed
• Total weight: 14,04 kg

Pictures: Gustav Gullholm