Single-ring cranksets eliminate the front derailleur, but that simplicity only works if the chainring stays put under power. The Force 1 D2 DUB crankset from SRAM uses their X-Sync 2 tooth profile with alternating wide and narrow teeth that wrap the chain with enough grip to hold it in place over rough terrain without a chain guide. The hollow carbon fiber arms keep weight competitive with double-ring setups while the DUB spindle interface works across SRAM's current bottom bracket ecosystem.

The D2 designation indicates compatibility with SRAM's current 12-speed Flattop chain, which uses a different roller width than previous 11-speed and 10-speed chains. The direct-mount chainring interface lets you swap ring sizes without replacing the entire crankset. Available chainring sizes range from 38T to 46T depending on your gearing needs, and the 8-bolt direct mount pattern accepts aftermarket rings if you want something outside SRAM's stock options.

DUB spindle diameter measures 28.99mm, which is larger than traditional 24mm GXP spindles. This increased diameter improves stiffness through the pedaling stroke without adding significant weight. The spindle works with DUB-specific bottom brackets in threaded, press-fit, and T47 shell configurations, so you'll need to match your frame's bottom bracket shell to the correct DUB unit.... Read More