The Dangermule
Every Dangerholm project has a specific goal in mind – whether it's a challenging system weight to achieve or a technical integration to implement. The bike is planned out on paper, a list of specifications is drawn up, and construction begins. After that, the bike usually stays as it is – or is completely dismantled and prepared for an upcoming project, such as the Priorbikes, which were intermediate builds.
This bike breaks out of this mould, as it will serve as a test bed for future ideas and will be regularly rebuilt. Dangerholm wanted a good XC bike for everyday use on which he could easily test various components, be it exciting tyre combinations or brake discs...
He adapted the idea from the automotive world, where such setups are known as ‘test mules’. This is how the ‘Dangermule’ project came about.
The Spark RC frame comes from an earlier project. The Ferrari red ‘Visione’ had suffered some paint damage after its first season. So Dangerholm decided to dismantle the bike, sand down the frame and repaint it.
The paint job with its striking neon colours (Dangerholm's favourite combination of yellow and pink on white) is inspired by bikes from the 1990s. The graphics (in Y2K style) provide a playful contrast. The work was quite time-consuming in the end, but it was a lot of fun.
Most of the parts come from old projects, but there are some interesting additions here and there. After all, the Dangermule serves as a test bike! The crank assembly, for example, reveals some exciting details. The left crank arm is from an SRAM XX with an integrated power meter in the shaft. The right crank arm is from an XX SL, combined with a RadoxX Bergakungen chainring to reduce weight. This gives the Dangermule a classic look, but it has all the necessary details for the Flight Attendant system.
Dangerholm is also testing the new Jagwire Pro LR2 brake discs on this bike for the first time, which are visually appealing and also deliver impressive performance. If you are looking for new discs, then you should definitely consider the Jagwire. All in all, the Dangermule weighs in at a solid 10.71 kg. This is partly due to the previous generation SID suspension fork. The (current) 2026 models have a new, lighter crown. However, this does not detract from the fun factor of the Dangermule.
Bike Presentation
SCOTT Spark RC Dangermule
| Frame | SCOTT Spark RC, L |
| Fork | RockShox SID Ultimate Flight Attendant |
| Rear shock | RockShox SIDLuxe Ultimate Flight Attendant |
| Headset | Syncros +/- 0,6° adjustable |
| Handlebar | Bike Ahead Composites The Wonderbar |
| Stem | Intend Grace XC |
| Aheadcap | Radoxx Oknytt |
| Shifter | Zirbel ZShift 01 with SRAM BlipBox in the stem |
| Grips | Syncros Foam |
| Brakes | Trickstuff Piccola Carbon |
| Brake discs | Jagwire Pro LR2 160+180mm |
| Brake bolts | Meti |
| Saddle | Björn Setka |
| Seatpost | RockShox Reverb AXS 125mm |
| Crank | SRAM XX Power Meter Upgrade + SRAM XX SL drive side crank |
| Bottom bracket | CeramicSpeed PF41 DUB |
| Chainring | RadoxX Components Bergakungen 38Z |
| Chain | SRAM XX SL T-Type |
| Cassette | SRAM X0 Transmission |
| Rear derailleur | SRAM X0 Transmission with HOPP parallelogram and skid plate |
| Rear derailleur cage | CeramicSpeed OSPW X for Transmission |
| Bottle Cage | Syncros Tailorcage 1.0 |
| Pedals | Xpedo M-Force 8Ti |
| Wheelset | Syncros Silverton SL |
| Tires | Schwalbe Rick XC 29x2,4” |
| Weight | 10,71 kg |