The e*Thirteen Guidering is perfect for any single chainring application -- singlespeed or 1 x configurations, with or without a chainguide. It's CNC machined from long wearing 7075-T6 aluminum. It's made to fit any four arm crank with a 104mm bolt circle. It's also compatible with 8-, 9-, and 10-speed chains. Guiderings are available in even and odd tooth counts from 32t to 40t, they come in anodized Black.

• Ultra-tough aluminum construction lasts for seasons of abuse
• A 104-millimeter bolt circle diameter offers compatibility with nearly all mountain cranks and chainguides
• Variety of anodized colors lend some bling to your rig