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Setups
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Gearing
Stock gearing for the Custom Works Bullet, with common pinions and their ratios.
| Pinion | Spur ÷ pinion | FDR |
|---|---|---|
| 19T | 4.26 | 11.13 |
| 20T | 4.05 | 10.57 |
| 21T | 3.86 | 10.07 |
| 22T | 3.68 | 9.61 |
| 23T | 3.52 | 9.19 |
| 24T | 3.38 | 8.81 |
| 25T | 3.24 | 8.46 |
| 26T | 3.12 | 8.13 |
| 27T | 3.00 | 7.83 |
| 28T | 2.89 | 7.55 |
| 29T | 2.79 | 7.29 |
| 30T | 2.70 | 7.05 |
| 31T | 2.61 | 6.82 |
| 32T | 2.53 | 6.61 |
Shaded rows are the pinions most 1/10 2WD sprint setups run on the stock spur.
What pinion should I run?
Tell us your motor and track and get a starting pinion for the Custom Works Bullet, with the range racers in the class run.
Get a recommendation →Shop pinion gears at AMain →What pinion gear should I use on the Custom Works Bullet?
It depends on your motor and the track. In the 1/10 2WD sprint class, racers gear by final drive ratio: 7.5–8.5T near 8.13. On the Bullet's stock 81T spur that is about 26T for 7.5–8.5T. Tight tracks gear down, open tracks gear up. For a starting pinion matched to your motor, use the So Dialed Pinion Recommender with the Bullet selected.
What is the internal ratio (transmission ratio) of the Custom Works Bullet?
The Bullet has an internal ratio of 2.61:1. Final drive ratio = spur ÷ pinion × 2.61. With the stock 81T spur, a 19T pinion gives an FDR of 11.13 and a 32T gives 6.61.
How many teeth is the stock spur gear on the Custom Works Bullet?
81 teeth. Changing the spur moves every pinion's ratio at once; most racers leave the spur and tune with the pinion.
Setup Help
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