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Setups
Gearing
Stock gearing for the ARRMA Kraton 1/5, with common pinions and their ratios.
| Pinion | Spur ÷ pinion | FDR |
|---|---|---|
| 14T | 3.36 | 10.91 |
| 15T | 3.13 | 10.18 |
| 16T | 2.94 | 9.55 |
| 17T | 2.76 | 8.99 |
| 18T | 2.61 | 8.49 |
| 19T | 2.47 | 8.04 |
| 20T | 2.35 | 7.64 |
| 21T | 2.24 | 7.27 |
| 22T | 2.14 | 6.94 |
| 23T | 2.04 | 6.64 |
| 24T | 1.96 | 6.36 |
What pinion should I run?
Tell us your motor and track and get a starting pinion for the ARRMA Kraton 1/5, with the range racers in the class run.
Get a recommendation →Shop pinion gears at AMain →What pinion gear should I use on the ARRMA Kraton 1/5?
It depends on your motor and the track. A hotter motor (lower turns, higher Kv) takes a smaller pinion; a tight track wants a lower gear than an open one. Start near the middle of the pinions the Kraton 1/5 shipped with, run a few minutes, and check motor temperature before going up a tooth. The So Dialed Pinion Recommender gives a starting pinion for your motor where we have class data.
What is the internal ratio (transmission ratio) of the ARRMA Kraton 1/5?
The Kraton 1/5 has an internal ratio of 3.25:1. Final drive ratio = spur ÷ pinion × 3.25. With the stock 47T spur, a 14T pinion gives an FDR of 10.91 and a 24T gives 6.36.
How many teeth is the stock spur gear on the ARRMA Kraton 1/5?
47 teeth. Changing the spur moves every pinion's ratio at once; most racers leave the spur and tune with the pinion.
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