"Like the SRAM XX1 crankset, the new X01 has carbon fiber crank arms. The primary difference between the two sets is their bolt circle diameter, or BCD. The X01 crank uses a slightly larger BCD than XX1, making the chainrings the only items that aren’t cross-compatible between SRAM’s two 11-speed mountain bike groupsets.
According to SRAM, the 76mm BCD rings and spiders used on XX1 are significantly more expensive to produce. To keep the price in check, SRAM opted to use a simpler and easier-to-produce 94mm BCD for X01". bikeradar (rewiev)
Built for total chain control, each tooth’s thickness is CNC-machined to fit better into the chain’s inner and outer links. All the X-SYNC chain rings work with the same spider—which lets you to change them without removing the crank arm.
note: SRAM’s X01 and XX1 cranksets have different bolt circle diameters
crank arm length
- New X-SYNC™ tooth profile provides maximum chain control
Carbon arms with forged aluminum spider
Chainring guard option
New spider design allows for easier ring changes
CNC- X-SYNC machined rings (30-32-34-36-38)