Setups
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Gearing
Stock gearing for the 3Racing M4 Pro 2018, with common pinions and their ratios.
| Pinion | Spur ÷ pinion | FDR |
|---|---|---|
| 20T | 5.10 | 9.69 |
| 21T | 4.86 | 9.23 |
| 22T | 4.64 | 8.81 |
| 23T | 4.43 | 8.43 |
| 24T | 4.25 | 8.07 |
| 25T | 4.08 | 7.75 |
| 26T | 3.92 | 7.45 |
| 27T | 3.78 | 7.18 |
| 28T | 3.64 | 6.92 |
| 29T | 3.52 | 6.68 |
| 30T | 3.40 | 6.46 |
| 31T | 3.29 | 6.25 |
| 32T | 3.19 | 6.06 |
| 33T | 3.09 | 5.87 |
| 34T | 3.00 | 5.70 |
| 35T | 2.91 | 5.54 |
| 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 |
| 48T | 2.13 | 4.04 |
| 49T | 2.08 | 3.96 |
| 50T | 2.04 | 3.88 |
| 51T | 2.00 | 3.80 |
| 52T | 1.96 | 3.73 |
Shaded rows are the pinions most 1/10 4WD 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 3Racing M4 Pro 2018, with the range racers in the class run.
Get a recommendation →Shop pinion gears at AMain →What pinion gear should I use on the 3Racing M4 Pro 2018?
It depends on your motor and the track. In the 1/10 4WD touring/gt class, racers gear by final drive ratio: 6T and below near 7.34, 13.5T near 4.51, 17.5T near 4.51, 21.5T and up near 3.65. On the M4 Pro 2018's stock 102T spur that is about 26T for 6T and below, 43T for 13.5T, 43T for 17.5T, 53T for 21.5T and up. Tight tracks gear down, open tracks gear up. For a starting pinion matched to your motor, use the So Dialed Pinion Recommender with the M4 Pro 2018 selected.
What is the internal ratio (transmission ratio) of the 3Racing M4 Pro 2018?
The M4 Pro 2018 has an internal ratio of 1.9:1. Final drive ratio = spur ÷ pinion × 1.9. With the stock 102T spur, a 20T pinion gives an FDR of 9.69 and a 52T gives 3.73.
How many teeth is the stock spur gear on the 3Racing M4 Pro 2018?
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 (Outdoor asphalt). Part numbers link to AMain.
- Front
- 400 cst
- Rear
- 400 cst
- Front
- 3.1C Red
- Rear
- 2.95C Blue
- Front
- 4-hole
- Rear
- 4-hole
- Rear
- 10,000 cst
What shock oil does the 3Racing M4 Pro 2018 come with?
Out of the box the M4 Pro 2018 runs 400 cst front, 400 cst rear, on 4-hole front, 4-hole 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 3Racing M4 Pro 2018 come with?
The kit springs are 3.1C Red front, 2.95C Blue rear. Stiffer springs suit high grip and big jumps; softer springs add grip on slick or bumpy tracks.
What diff fluid does the 3Racing M4 Pro 2018 come with?
The kit diff fluid is 10,000 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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