- Prevents chain derailment when shifting to inner ring
- Adjustable hose-type clamp fits 1-1/8" to 1-3/8" seat tubes
*We do our best to ship your order same day. If you order falls outside of our normal business hours (11A - 5P everyday except Thursdays 11A - 7P, we are closed on Mondays) your order will ship next day. All orders shipped via USPS priority mail.