Elegant and secure direct-mount X-SYNC chainrings from the company that originated the 1x drivetrain for the ultimate in consistent chain control over the long haul.
MODEL ID: FC-RIV-1W-D1
- Direct mount chainrings in 38T through 46T
- DUB bottom bracket adds durability and simplicity
- Wide chainline crankset to fit the biggest gravel tires
- Longer DUB crank spindle accommodates both Road and MTB width frame bottom bracket standards for unmatched cross-compatibility across brands
- Compatible with 135, 142 and BOOST rear spacing
The relationship between bottom bracket spindle and bearing is the core of DUB technology. It’s where stiffness meets durability. SRAM took it a step beyond conventional thinking and made everything simpler—better integrating the relationship between chainring, crank, spindle and bottom bracket. It’s this approach to developing a complete system that equals better drivetrain performance.
Road bikes are faster and more capable than ever before, and riders are expanding what’s possible with drop bar bikes. X-Range is gearing for today’s road riding. SRAM completely reimagined road gearing for wider range, more useful and smoother gear progression, as well as smarter shift settings—enabled by AXS. With X-Range, you’re always in the right gear.
|CRANK ARM LENGTH||160mm, 165mm, 170mm, 172.5mm, 175mm|
|BB SPINDLE INTERFACE||DUB|
|BB COMPATIBILITY||All SRAM Road WIDE DUB BBs|
|BOLT CIRCLE DIAMETER (BCD)||Direct Mounts (DM)|
|CHAINRING SIZE||40T, 46T
160mm / 40T 00.6118.612.008
165mm / 40T 00.6118.612.000
170mm / 40T 00.6118.612.001
172.5mm / 40T 00.6118.612.002
175mm / 40T 00.6118.612.003
160mm / 46T 00.6118.612.009
165mm / 46T 00.6118.612.004
170mm / 46T 00.6118.612.005
172.5mm / 46T 00.6118.612.006
175mm / 46T 00.6118.612.007