Do I have a 3-bolt or 8-bolt crank?
Look at your crank spider where the chainring bolts on. If you see 3 bolt holes arranged in a triangle pattern, you have a 3-bolt direct mount. If you see 8 bolt holes in a circle pattern, you have an 8-bolt. Not sure? Look up your specific crank on the SRAM Service Site.
Watch the how to install Ochain for more on installing to a crank:
What chainring do I need?
Ochain R and N has a built-in 3mm offset and works with any 104 BCD chainring (not included). Need a chainring? We've got you: SRAM XX 104 BCD T-Type Chainring
Watch the how to install a chainring on Ochain for more on spacer installation:
What chainline will I get?
With any 104 BCD chainring and Ochain R / N:
- DUB Wide spindle crankset = 55mm chainline
- Standard DUB spindle crankset = 52mm chainline
- DUB DH spindle crankset = add 3mm spacers and long bolt hardware to achieve 56.5mm DH chainline
Do I need the 3mm spacers?
Only if you're running a DUB DH spindle crank and need 56.5mm chainline. The spacers and long bolt hardware are included with the SRAM XX 104 BCD T-Type Chainring or available separately in the Ochain Chain Bolt Kit.
What travel setting should I run?
Start with 9° for most trail and enduro riding. Dial it back toward 3° or Lock if you want a snappier, more efficient feel on smoother terrain. Go to 12° for chunky, rough DH-style riding where you want maximum feedback reduction.
What's included with Ochain R and N?
Ochain R and N spider and spider-to-crank mounting bolts. Chainring, chainring bolts, and spacer hardware are not included.
How often does it need service?
Elastomer replacement at 100 hours, full service at 200 hours -- same interval as your suspension service. Most home mechanics can handle it.