Ask Miles, our Setup AI that’s been trained on the RTA V3.1.
Setups
Gearing
Stock gearing for the RTRC RTA V3.1, with common pinions and their ratios.
| Pinion | Spur ÷ pinion | FDR |
|---|---|---|
| 4T | 13.25 | 13.25 |
| 5T | 10.60 | 10.60 |
| 6T | 8.83 | 8.83 |
| 7T | 7.57 | 7.57 |
| 8T | 6.63 | 6.63 |
| 9T | 5.89 | 5.89 |
| 10T | 5.30 | 5.30 |
| 11T | 4.82 | 4.82 |
| 12T | 4.42 | 4.42 |
| 13T | 4.08 | 4.08 |
| 14T | 3.79 | 3.79 |
| 15T | 3.53 | 3.53 |
| 16T | 3.31 | 3.31 |
Shaded rows are the pinions most 1/24-1/28 2WD touring/gt setups run on the stock spur.
What pinion should I run?
Tell us your motor and track and get a starting pinion for the RTRC RTA V3.1, with the range racers in the class run.
Get a recommendation →Shop pinion gears at AMain →What pinion gear should I use on the RTRC RTA V3.1?
It depends on your motor and the track. Racers in the 1/24-1/28 2WD touring/gt class run a 6–14 tooth pinion in most setups, usually on a 53T spur for a final drive ratio near 5.30. 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 RTA V3.1 selected.
What is the internal ratio (transmission ratio) of the RTRC RTA V3.1?
The RTA V3.1 has an internal ratio of 1:1. Final drive ratio = spur ÷ pinion × 1. With the stock 53T spur, a 4T pinion gives an FDR of 13.25 and a 16T gives 3.31.
How many teeth is the stock spur gear on the RTRC RTA V3.1?
53 teeth. Changing the spur moves every pinion's ratio at once; most racers leave the spur and tune with the pinion.
Kit setup
Kit shock setup. Part numbers link to AMain.
- Front
- Green
- Side
- Green
What springs does the RTRC RTA V3.1 come with?
The kit springs are Green front, Green side. Stiffer springs suit high grip and big jumps; softer springs add grip on slick or bumpy tracks.
Setup Help
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Setup App & Race Log
Your RTRC RTA V3.1 is in the RC Setup App
Save every setup change you make to your RTRC RTA V3.1, get AI tuning answers for that exact car, and log your races — at the track or back in the pits.
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