- 2-piece aluminum crank arms with Ultra-Torque semi-axles in AISI 630 steel for strength and light weight
- Semi-axles with Hirth ProTech technology are strong, efficient and self-aligning
- Lightweight resistant chainrings in premium 7075 aluminum are easily interchangeable: simply unscrew them off the four arms of the crank with no need to dismantle the crankset
- Optimized tooth design for efficient transmission and maximum chain reliability
- The four arms are arranged symmetrically for optimum load distribution and have a 104 mm bolt circle diameter
Single chainrings are obviously simple to use: no front derailleur, considerably less weight, fewer moving components that gather dirt and may cause blockages and better chain security with no useless overlapping chainrings - the perfect solution for gravel.
