Bike check: Stefan Sahm's Cape Epic 2025 Bulls Vuca Evo AM

Stefan Sahm is a celebrated figure in mountain biking and has left an indelible mark on the sport – particularly within the demanding realm of stage racing. Known for his exceptional endurance, tactical acumen, and spirited approach, Sahm became a familiar presence at events such as the Absa Cape Epic.
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Representing various prominent team pairings throughout his career, his participation consistently injected a blend of experience and competitive fire into the field.
Sahm's Cape Epic campaigns were often characterised by his unwavering determination and ability to navigate the challenging terrain of the Western Cape. Whether partnering with seasoned veterans or emerging talents, his strategic insights and relentless pacing made him a key player in the dynamics of the race. His contributions frequently saw his teams vying for top positions, showcasing a deep understanding of multi-day racing.
Beyond the results, Sahm is a proven engineering mind with products such the Sahmurai Sword, a quick-access tubeless plug system that is the choice of many riders. Sahm has also been instrumental in improving race coverage, making use of bikes and mobilised broadcast equipment to capture live footage as part of the broader production package.
Shimano XT four-pot calipers with cooling fins.
Schwalbe Magic Mary front and rear, running on the softest, grippiest compound.
The control interface offers easy change over and is weather proofed.
Fox 38 fork with 150mm of travel. Pretty solid for an 'all-rounder'.
Bulls and the media team are working on a new board mount. The 3d-printed construction can simply bolt onto an integrated cockpit or bracket, providing a clean mount for number boards. The cowling behind the board can double as storage.
If you're going to see a Sahmurai Sword, it's going to be on the inventor's bike at least.
Bulls in-house one-piece cockpit setup, note the mounting underneath for the board mount.
Fizik perch, a regular choice.
Pinion's E1.12s gearbox motor has 12 integrated gears and can run up to a claimed 10,000km maintenance-free.
The belt drive is solid and reliable, running on a 32T Gates sprocket. The black hangar works like a chain keeper and can be rotated upwards in the event a wheel needs to be removed.
The Pinion shifter unit is a straightforward, simple-to-use unit, and shifts can be made while freewheeling.
Spring-loaded pulley wheels keep the belt in tension.
Sahm congratulates Marco Joubert on an exceptional Epic.