Rotor eKAPIC Crank Arms - eMTB | ISIS - for Bosch Gen4 (QF 171 mm) - black

With the eKAPIC crank arms, mountain bikers come a significant step closer to the dream of a lighter E-Bike. To achieve a design specifically adapted to E-MTBs, Rotor has specifically developed the design and technologies of its proven MTB cranksets. Trinity Drilling System. Thanks to three holes along the longitudinal axis of each arm, excess material is removed. Thus, the TDS process reduces to a significant extent the weight of the crank arms made of forged and CNC-machined aluminum, without negatively affecting the stiffness. Narrow Q-factor. When it comes to tackling climbs, the eMTB clearly plays to its strengths, but is usually at a disadvantage in terms of pedaling feel compared to conventional bikes. With the realization of a Q-Factor that is as narrow as possible for E-Bikes, Rotor has not only addressed this circumstance, but also actively contributes to preventing biomechanical damage when riding off-road as well as problems with hips and knees. Technical details of the Rotor eKAPIC crank arms range of use: E-Bike / E-MTB material: aluminum 6082 (forged, CNC-machined) axle profile drive unit: ISIS chain ring type: Direct Mount chain line: 52 mm outer Q-Factor: 171 mm inner Q-Factor: 146 mm compatibility: Bosch drive unit (generation 4) weight: approx. 415 g (170 mm; manufacturer's specification) Scope of supply: 1 pair of crank arms incl. spacer (1 mm) and black bumper set (protection caps) without chainring