Ask Miles, our Setup AI that’s been trained on the Asphalt Late Model 1/18.
Setups
Gearing
Stock gearing for the 1RC Asphalt Late Model 1/18, with common pinions and their ratios.
| Pinion | Spur ÷ pinion | FDR |
|---|---|---|
| 10T | 4.90 | 4.90 |
| 11T | 4.45 | 4.45 |
| 12T | 4.08 | 4.08 |
| 13T | 3.77 | 3.77 |
| 14T | 3.50 | 3.50 |
| 15T | 3.27 | 3.27 |
| 16T | 3.06 | 3.06 |
| 17T | 2.88 | 2.88 |
| 18T | 2.72 | 2.72 |
| 19T | 2.58 | 2.58 |
| 20T | 2.45 | 2.45 |
| 21T | 2.33 | 2.33 |
| 22T | 2.23 | 2.23 |
What pinion should I run?
Tell us your motor and track and get a starting pinion for the 1RC Asphalt Late Model 1/18, with the range racers in the class run.
Get a recommendation →Shop pinion gears at AMain →What pinion gear should I use on the 1RC Asphalt Late Model 1/18?
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 Asphalt Late Model 1/18 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 1RC Asphalt Late Model 1/18?
The Asphalt Late Model 1/18 has an internal ratio of 1:1. Final drive ratio = spur ÷ pinion × 1. With the stock 49T spur, a 10T pinion gives an FDR of 4.90 and a 22T gives 2.23.
How many teeth is the stock spur gear on the 1RC Asphalt Late Model 1/18?
49 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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