Ask Miles, our Setup AI, trained on RC manuals and setup guides.
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.
Setup Help
All Bashers →
Kraton 1/5 questions
Why won’t my ARRMA Kraton 1/5 respond to the remote?
First, put the Kraton on a stand with all wheels clear, then check that the transmitter has fresh batteries and is switched on before connecting the truck’s drive batteries. Make...
Oct 7, 2026
Part number for long internal chassis brace on Arrma Kraton 1/5?
I can’t verify the part number for the Kraton 1/5’s internal long chassis brace. If you share the exact version or a photo of the brace, I can help identify it without guessing.
Oct 3, 2026
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