- Monocoque carbon composite arms/spider, no drilling for granny ring
- Integrated bottom bracket spindle, external bearing-type alloy cups
- 29/44t covers 90% of the useable range allowed by triple cranks, but at less weight
- 94mm BCD CNC 7075 aluminum rings with ramps/pins on the outer
- Includes 7075 aluminum chainring bolts. 725g (175mm with BB)
Confused about bottom bracket standards and what it is you need? Here's a comprehensive look at the subject:
The Bottom Bracket (Un)Standard blog post.