Setups
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Gearing
Stock gearing for the XRAY X1 '25, with common pinions and their ratios.
| Pinion | Spur ÷ pinion | FDR | Rollout |
|---|---|---|---|
| 26T | 3.08 | 3.08 | 63.3 mm |
| 27T | 2.96 | 2.96 | 65.7 mm |
| 28T | 2.86 | 2.86 | 68.2 mm |
| 29T | 2.76 | 2.76 | 70.6 mm |
| 30T | 2.67 | 2.67 | 73.0 mm |
| 31T | 2.58 | 2.58 | 75.5 mm |
| 32T | 2.50 | 2.50 | 77.9 mm |
| 33T | 2.42 | 2.42 | 80.3 mm |
| 34T | 2.35 | 2.35 | 82.8 mm |
| 35T | 2.29 | 2.29 | 85.2 mm |
| 36T | 2.22 | 2.22 | 87.7 mm |
| 37T | 2.16 | 2.16 | 90.1 mm |
| 38T | 2.11 | 2.11 | 92.5 mm |
| 39T | 2.05 | 2.05 | 95.0 mm |
| 40T | 2.00 | 2.00 | 97.4 mm |
| 41T | 1.95 | 1.95 | 99.8 mm |
| 42T | 1.90 | 1.90 | 102.3 mm |
| 43T | 1.86 | 1.86 | 104.7 mm |
| 44T | 1.82 | 1.82 | 107.1 mm |
| 45T | 1.78 | 1.78 | 109.6 mm |
| 46T | 1.74 | 1.74 | 112.0 mm |
| 47T | 1.70 | 1.70 | 114.4 mm |
Shaded rows are the pinions most 1/10 2WD f1 setups run on the stock spur. Rollout at a 62 mm tire.
What pinion should I run?
Tell us your motor and track and get a starting pinion for the XRAY X1 '25, with the range racers in the class run.
Get a recommendation →Shop pinion gears at AMain →What pinion gear should I use on the XRAY X1 '25?
It depends on your motor and the track. In the 1/10 2WD f1 class, racers gear by final drive ratio: 21.5T and up near 2.19. On the X1 '25's stock 80T spur that is about 37T 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 X1 '25 selected.
What is the internal ratio (transmission ratio) of the XRAY X1 '25?
The X1 '25 has an internal ratio of 1:1. Final drive ratio = spur ÷ pinion × 1. With the stock 80T spur, a 26T pinion gives an FDR of 3.08 and a 47T gives 1.70.
How many teeth is the stock spur gear on the XRAY X1 '25?
80 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. Part numbers link to AMain.
- Center
- 550 cst
- Side tubes
- 15,000
- Front
- 3.0C Grey
- Center
- 2.3-2.6C #308263 →
- Side
- 0.9C Gold
What shock oil does the XRAY X1 '25 come with?
Out of the box the X1 '25 runs 550 cst center, 15,000 side tubes (XRAY oil). 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 XRAY X1 '25 come with?
The kit springs are 3.0C Grey front, 2.3-2.6C (#308263) center, 0.9C Gold side. Stiffer springs suit high grip and big jumps; softer springs add grip on slick or bumpy tracks.
Setup Help
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