Ask Miles, our Setup AI that’s been trained on the TRF420.
Setups
Kit setup
Kit shock setup. Part numbers link to AMain.
- Front
- 400 cst
- Rear
- 400 cst
- Rear
- 3,000 cst
What shock oil does the Tamiya TRF420 come with?
Out of the box the TRF420 runs 400 cst front, 400 cst rear, on 4-hole (#54728) front, 4-hole (#54728) 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 Tamiya TRF420 come with?
The kit springs are Dark Grey-Green Short (#42306) front, Dark Grey-Green Short (#42306) rear. Stiffer springs suit high grip and big jumps; softer springs add grip on slick or bumpy tracks.
What diff fluid does the Tamiya TRF420 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
All Touring Cars →
Free to start · iOS & Android
Setup App & Race Log
Your Tamiya TRF420 is in the RC Setup App
Save every setup change you make to your Tamiya TRF420, 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
