Gustav “Dangerholm” Gullholm, renowned for his innovative custom bike builds, has recently unveiled a remarkable Scott Spark RC HMX Gravel Project. This creation seamlessly blends cross-country (XC) mountain bike technology with gravel riding capabilities, resulting in a lightweight and high-performance machine.<\/p>\n
Frame and Geometry:<\/strong> Cockpit and Components:<\/strong> Drivetrain:<\/strong> Braking System:<\/strong> Wheels and Tires:<\/strong> Saddle and Seatpost:<\/strong> This custom build exemplifies Dangerholm’s commitment to pushing the boundaries of bike design, resulting in a unique and high-performance gravel machine that challenges traditional classifications.<\/p>\n
\nStarting with a Scott Spark RC HMX full-suspension frame, Dangerholm downsized to a Medium size to achieve a shorter reach and wheelbase, enhancing gravel-oriented handling. The frame underwent significant modifications, including cutting and reinforcing the chainstay to accommodate a larger 46T chainring, deviating from the standard 38T compatibility. (bikeradar.com<\/a>)<\/p>\n
\nThe bike features a custom Darimo Nexum Drag gravel cockpit with an 80mm stem and 380mm width, tailored to the frame’s geometry. A unique -12-degree stem angle complements the slacker head tube angle of the Scale frame. The integrated headset hardware ensures a clean and aerodynamic setup. (road.cc<\/a>)<\/p>\n
\nEquipped with a SRAM Red XPLR AXS 13-speed groupset, the bike includes a 10-46t cassette and a 44T Red Aero chainring with a power meter. The Wert StW-M titanium crankset, featuring hollow crank arms, contributes to a reduced weight of 314g. CeramicSpeed OSPW X Alpha jockey wheels and a CeramicSpeed Alpha bottom bracket enhance performance and efficiency. (road.cc<\/a>)<\/p>\n
\nThe braking system comprises SRAM Red E1 levers paired with 612-Parts post-mount aero calipers, offering an aerodynamic advantage. Carbon-Ti X-Rotor Aero rotors further reduce weight while maintaining braking performance. (road.cc<\/a>)<\/p>\n
\nA standout feature is the custom wheelset with prototype 45mm internal-width, 70mm-deep wave-profile rims, developed in collaboration with Canadian firms. These rims are designed for aerodynamics and tire stability with 2.25-inch MTB tires. The wheels are built onto Extralite HyperSmart 3 hubs with Alpina Hyperlite spokes, featuring a Boost adaptor kit and compatibility with a SRAM XDR freehub. (bikeradar.com<\/a>)<\/p>\n
\nThe bike is equipped with a Berk Lupina Monocoque saddle, weighing 99g, mounted on an aero seatpost sourced from a crashed Scott Foil RC aero road bike. This integration maintains the bike’s clean silhouette and contributes to its lightweight design. (bikeradar.com<\/a>)<\/p>\n