Ask Miles, our Setup AI that’s been trained on the R12.1.
Setups
Kit setup
Kit shock setup (Medium grip). Part numbers link to AMain.
- Front
- 500 cst
- Rear
- 500 cst
- Front
- 20mm 2.7C Silver #R127101 →
- Rear
- 20mm 2.7C Silver #R127101 →
- Front
- Kit #R104018 →
- Rear
- Kit #R104018 →
- Rear
- 3,000 cst
What shock oil does the ARC R12.1 come with?
Out of the box the R12.1 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 R12.1 come with?
The kit springs are 20mm 2.7C Silver (#R127101) front, 20mm 2.7C Silver (#R127101) rear. Stiffer springs suit high grip and big jumps; softer springs add grip on slick or bumpy tracks.
What diff fluid does the ARC R12.1 come with?
The kit diff fluid is 3,000 cst rear. Thicker front adds steering on power; thicker center sends more drive rearward; thicker rear stabilizes the car under throttle.
Setup Help
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Setup App & Race Log
Your ARC R12.1 is in the RC Setup App
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