The Rocket Sprocket Chain Guide will reduce chain loss and sprocket damage when you drop a wheel or hit a curb. Don't let your race end early. It can also help keep the chain from falling off due to minor miss alignments. Hardware included.
| Size | Diameter | #35 Tooth | #219 Tooth |
| XS | 8 | 52T - 62T | 65T -76T |
| S | 8 3/4 | 63T - 70T | 77T - 85T |
| M | 9 1/4 | 70T - 74T | 86T - 91T |
| L | 10 | 74T - 81T | 92T - 95T |