Setups
No setups found
No public setups have been shared for this car model yet.
Have a setup for the R12FF?
Share your setup sheet with the community — we'll fill in the details automatically.
Gearing
Stock gearing for the ARC R12FF, with common pinions and their ratios.
| Pinion | Spur ÷ pinion | FDR |
|---|---|---|
| 36T | 2.83 | 5.38 |
| 37T | 2.76 | 5.24 |
| 38T | 2.68 | 5.10 |
| 39T | 2.62 | 4.97 |
| 40T | 2.55 | 4.84 |
| 41T | 2.49 | 4.73 |
| 42T | 2.43 | 4.61 |
| 43T | 2.37 | 4.51 |
| 44T | 2.32 | 4.40 |
| 45T | 2.27 | 4.31 |
| 46T | 2.22 | 4.21 |
| 47T | 2.17 | 4.12 |
Shaded rows are the pinions most 1/10 FWD 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 ARC R12FF, with the range racers in the class run.
Get a recommendation →Shop pinion gears at AMain →What pinion gear should I use on the ARC R12FF?
It depends on your motor and the track. In the 1/10 FWD touring/gt class, racers gear by final drive ratio: 17.5T near 4.51. On the R12FF's stock 102T spur that is about 43T 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 R12FF selected.
What is the internal ratio (transmission ratio) of the ARC R12FF?
The R12FF has an internal ratio of 1.9:1. Final drive ratio = spur ÷ pinion × 1.9. With the stock 102T spur, a 36T pinion gives an FDR of 5.38 and a 47T gives 4.12.
How many teeth is the stock spur gear on the ARC R12FF?
102 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 (MediumGrip). Part numbers link to AMain.
- Front
- 500 cst
- Rear
- 500 cst
- Front
- 20mm 2.5-2.8C Red #R127110 →
- Rear
- 20mm 2.7C Silver #R127101 →
- Front
- Kit #R104018 →
- Rear
- Kit #R104018 →
What shock oil does the ARC R12FF come with?
Out of the box the R12FF runs 500 cst front, 500 cst rear, on Kit (#R104018) front, Kit (#R104018) 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 ARC R12FF come with?
The kit springs are 20mm 2.5-2.8C Red (#R127110) front, 20mm 2.7C Silver (#R127101) rear. Stiffer springs suit high grip and big jumps; softer springs add grip on slick or bumpy tracks.
Setup Help
All Touring Cars →
Free to start · iOS & Android
Setup App & Race Log
Your ARC R12FF is in the RC Setup App
Save every setup change you make to your ARC R12FF, get AI tuning answers for that exact car, and log your races — at the track or back in the pits.
- Setup Tracking
- AI Mechanic answers
- Find & Share Setups
- Race Log
- Gear Ratio Calculator
- Free to use
