Ask Miles, our Setup AI that’s been trained on the Rocket 5.
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Gearing
Stock gearing for the Custom Works Rocket 5, with common pinions and their ratios.
| Pinion | Spur ÷ pinion | FDR | Rollout |
|---|---|---|---|
| 18T | 4.50 | 11.74 | 18.3 mm |
| 19T | 4.26 | 11.13 | 19.4 mm |
| 20T | 4.05 | 10.57 | 20.4 mm |
| 21T | 3.86 | 10.07 | 21.4 mm |
| 22T | 3.68 | 9.61 | 22.4 mm |
| 23T | 3.52 | 9.19 | 23.4 mm |
| 24T | 3.38 | 8.81 | 24.5 mm |
| 25T | 3.24 | 8.46 | 25.5 mm |
| 26T | 3.12 | 8.13 | 26.5 mm |
| 27T | 3.00 | 7.83 | 27.5 mm |
| 28T | 2.89 | 7.55 | 28.5 mm |
| 29T | 2.79 | 7.29 | 29.6 mm |
Shaded rows are the pinions most 1/10 2WD late model setups run on the stock spur. Rollout at a 68.6 mm tire.
What pinion should I run?
Tell us your motor and track and get a starting pinion for the Custom Works Rocket 5, 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 Rocket 5?
It depends on your motor and the track. Racers in the 1/10 2WD late model class run a 20–27 tooth pinion in most setups, usually on a 81T spur for a final drive ratio near 8.81. Hotter motors (lower turns, higher Kv) take a smaller pinion; tight tracks gear down, open tracks gear up. For a starting pinion matched to your motor, use the So Dialed Pinion Recommender with the Rocket 5 selected.
What is the internal ratio (transmission ratio) of the Custom Works Rocket 5?
The Rocket 5 has an internal ratio of 2.61:1. Final drive ratio = spur ÷ pinion × 2.61. With the stock 81T spur, a 18T pinion gives an FDR of 11.74 and a 29T gives 7.29.
How many teeth is the stock spur gear on the Custom Works Rocket 5?
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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