Setups
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Gearing
Stock gearing for the SWORKz S12-3, with common pinions and their ratios.
| Pinion | Spur ÷ pinion | FDR |
|---|---|---|
| 18T | 4.50 | 11.70 |
| 19T | 4.26 | 11.08 |
| 20T | 4.05 | 10.53 |
| 21T | 3.86 | 10.03 |
| 22T | 3.68 | 9.57 |
| 23T | 3.52 | 9.16 |
| 24T | 3.38 | 8.78 |
| 25T | 3.24 | 8.42 |
| 26T | 3.12 | 8.10 |
| 27T | 3.00 | 7.80 |
| 28T | 2.89 | 7.52 |
| 29T | 2.79 | 7.26 |
| 30T | 2.70 | 7.02 |
| 31T | 2.61 | 6.79 |
| 32T | 2.53 | 6.58 |
Shaded rows are the pinions most 1/10 2WD buggy setups run on the stock spur.
What pinion should I run?
Tell us your motor and track and get a starting pinion for the SWORKz S12-3, with the range racers in the class run.
Get a recommendation →Shop pinion gears at AMain →What pinion gear should I use on the SWORKz S12-3?
It depends on your motor and the track. In the 1/10 2WD buggy class, racers gear by final drive ratio: 6T and below near 9.40, 7.5–8.5T near 9.22, 17.5T near 6.48. On the S12-3's stock 81T spur that is about 22T for 6T and below, 23T for 7.5–8.5T, 33T for 17.5T. Tight tracks gear down, open tracks gear up. For a starting pinion matched to your motor, use the So Dialed Pinion Recommender with the S12-3 selected.
What is the internal ratio (transmission ratio) of the SWORKz S12-3?
The S12-3 has an internal ratio of 2.6:1. Final drive ratio = spur ÷ pinion × 2.6. With the stock 81T spur, a 18T pinion gives an FDR of 11.70 and a 32T gives 6.58.
How many teeth is the stock spur gear on the SWORKz S12-3?
81 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 (Dirt). Part numbers link to AMain.
- Front
- 500 cst
- Rear
- 500 cst
- Front
- 5 dot
- Rear
- 2 dot #SWC-115162 →
- Front
- 2 x 1.7mm
- Rear
- 2 x 1.8mm
What shock oil does the SWORKz S12-3 come with?
Out of the box the S12-3 runs 500 cst front, 500 cst rear (SWORKz oil), on 2 x 1.7mm front, 2 x 1.8mm rear pistons. That is the kit setup; you will need to adjust it for your track conditions. The RC Setup App can help dial it in.
What springs does the SWORKz S12-3 come with?
The kit springs are 5 dot front, 2 dot (#SWC-115162) rear. 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 SWORKz S12-3 is in the RC Setup App
Save every setup change you make to your SWORKz S12-3, get AI tuning answers for that exact car, and log your races — at the track or back in the pits.
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