ROTOR crank 3D + 130/74 mm 3-fold for race
Based on the successful 3D crank rotor has built the 3D + crank system. The "Trinity Drilling System" was + extended in 3D that the crank has 3 holes in the entire length. With the bores material was removed from the center, the "neutral fiber" of the crank arm. This material contributes only to the least extent to sustainability of a component and can be omitted without any negative consequences. The necessary stiffness and stability is achieved with lightweight construction oversized outer diameter!
The shaft is designed with 30 mm outside diameter as BB30 and can always use the inner bearing in frame with BSA, BBright (Cervélo) and BB30 are driven.
The combination of three chainrings increases gear possible variations, ideal for tours with steep climbs.
bolt circle diameter : 130/74 mm | 5 hole
Standard shaft: BB30
Material crank arms, Spider: 7055 aluminum
Material shaft: aluminum
Length crank arm: 170, 172.5, or 175 mm
Weight: from 454 g (weighed in 5-arm, 110 mm)
Delivery: crank arms (left, right), shaft, spacer, chain ring bolts and operating instructions
INFO: contrary to the picture delivery with OCP Spider!