Setups
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Gearing
Stock gearing for the 3Racing Cero Ultra-Ace 2.0, with common pinions and their ratios.
| Pinion | Spur ÷ pinion | FDR |
|---|---|---|
| 20T | 5.60 | 10.64 |
| 21T | 5.33 | 10.13 |
| 22T | 5.09 | 9.67 |
| 23T | 4.87 | 9.25 |
| 24T | 4.67 | 8.87 |
| 25T | 4.48 | 8.51 |
| 26T | 4.31 | 8.18 |
| 27T | 4.15 | 7.88 |
| 28T | 4.00 | 7.60 |
| 29T | 3.86 | 7.34 |
| 30T | 3.73 | 7.09 |
| 31T | 3.61 | 6.86 |
| 32T | 3.50 | 6.65 |
| 33T | 3.39 | 6.45 |
| 34T | 3.29 | 6.26 |
| 35T | 3.20 | 6.08 |
| 36T | 3.11 | 5.91 |
| 37T | 3.03 | 5.75 |
| 38T | 2.95 | 5.60 |
| 39T | 2.87 | 5.46 |
| 40T | 2.80 | 5.32 |
| 41T | 2.73 | 5.19 |
| 42T | 2.67 | 5.07 |
| 43T | 2.60 | 4.95 |
| 44T | 2.55 | 4.84 |
| 45T | 2.49 | 4.73 |
| 46T | 2.43 | 4.63 |
| 47T | 2.38 | 4.53 |
| 48T | 2.33 | 4.43 |
| 49T | 2.29 | 4.34 |
| 50T | 2.24 | 4.26 |
| 51T | 2.20 | 4.17 |
| 52T | 2.15 | 4.09 |
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 Cero Ultra-Ace 2.0, 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 Cero Ultra-Ace 2.0?
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 Cero Ultra-Ace 2.0's stock 112T spur that is about 29T for 6T and below, 47T for 13.5T, 47T for 17.5T, 58T 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 Cero Ultra-Ace 2.0 selected.
What is the internal ratio (transmission ratio) of the 3Racing Cero Ultra-Ace 2.0?
The Cero Ultra-Ace 2.0 has an internal ratio of 1.9:1. Final drive ratio = spur ÷ pinion × 1.9. With the stock 112T spur, a 20T pinion gives an FDR of 10.64 and a 52T gives 4.09.
How many teeth is the stock spur gear on the 3Racing Cero Ultra-Ace 2.0?
112 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 (Med grip asphalt). Part numbers link to AMain.
- Front
- 350 cst
- Rear
- 350 cst
- Front
- 2.7C Yellow
- Rear
- 2.8C Green
- Front
- 4 x 1.1mm
- Rear
- 4 x 1.1mm
What shock oil does the 3Racing Cero Ultra-Ace 2.0 come with?
Out of the box the Cero Ultra-Ace 2.0 runs 350 cst front, 350 cst rear, on 4 x 1.1mm front, 4 x 1.1mm 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 Cero Ultra-Ace 2.0 come with?
The kit springs are 2.7C Yellow front, 2.8C Green 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 3Racing Cero Ultra-Ace 2.0 is in the RC Setup App
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