On your XC or cyclocross rig, Salsa's Ring Dinger Guard is a lightweight way to keep your chain in place. It's made out of CNC-machined aluminum and pairs well with a chain keeper device for a simple single front-ring setup.
To choose the correct chainring, 1) determine the number of teeth (they're usually marked, or simply count them), 2) determine how many bolt holes there are (usually 4 or 5), and 3) determine the Bolt Circle Diameter (BCD; see diagram).
Common BCDs include:
130mm (Shimano Road)
135mm (Campagnolo Road)
110mm (Compact Road)
104mm, 94mm, and 64mm (Mountain)
Finding the number of teeth and bolts holes is easy. If you don't know your chainring's BCD, measuring it is tricky. So, instead, measure the exact distance (center to center) between 2 adjacent bolt holes. Then find that number on the correct chart below to determine the BCD for your chainring.
|BCD Chart for 5-bolt Chainrings|
|Bolt to Bolt (measure center to center)||Bolt Circle Diameter (BCD)|
|BCD Chart for 4-bolt Chainring|
|Bolt to Bolt (measure center to center)
||Bolt Circle Diameter (BCD)|
If you have any questions concerning chainring compatibility, please contact us.
For use with chainrings up to 36T.
This is not a bash guard.
|110mm BCD, 5-bolt||657993018880||CR0408|
|104mm BCD, 4-bolt||657993018873||CR0406||4381|
|94mm BCD, 4-bolt||657993018866||CR0404|