Gear Ratios / Sprocket Changes
From the factory, the Rush SR ships with a 14T front sprocket and a 44T rear sprocket. The front sprocket is easy to change with a 32mm socket, and you can buy extra sprockets directly from RAW.
See the attached gear calculator for ratios. In short, if you are redlining in 6th, you should run a longer (higher-tooth) front sprocket. If you are not even making it into 6th, you should consider a shorter sprocket.
Our owners have also enjoyed changing sprockets to avoid “awkward” shift points. Sometimes it is better to redline 6th for a moment and enjoy shorter ratios on the rest of the track!
📥 Download: RUSH SR Gear Calculator.xlsx
Recommended Sprockets by Track (2026 Season)
Section titled “Recommended Sprockets by Track (2026 Season)”These are community-tested starting recommendations. When in doubt, 14T is the safer choice — you’ll occasionally rev-limit in 6th, but the tighter ratios are faster overall at most tracks.
| Track | Recommended | Notes |
|---|---|---|
| Carolina Motorsports Park | 14T | Technical track, short straights |
| Road Atlanta | 15T | Long back straight |
| Gingerman Raceway | 14T | Mix of low and medium speed |
| Watkins Glen | 15T | Frontstretch and bus stop straight |
| Lime Rock Park | 14T | Very technical, no long straights |
| Laguna Seca | 14T | Corkscrew section punishes tall gearing |
Rule of thumb: If you’re hitting the rev limiter in 6th for more than a few seconds, go up one tooth. If you never make it into 6th, go down one tooth.