Setups
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Gearing
Stock gearing for the XRAY X12 '26, with common pinions and their ratios.
| Pinion | Spur ÷ pinion | FDR | Rollout |
|---|---|---|---|
| 22T | 3.64 | 3.64 | 35.1 mm |
| 23T | 3.48 | 3.48 | 36.7 mm |
| 24T | 3.33 | 3.33 | 38.3 mm |
| 25T | 3.20 | 3.20 | 39.9 mm |
| 26T | 3.08 | 3.08 | 41.5 mm |
| 27T | 2.96 | 2.96 | 43.0 mm |
| 28T | 2.86 | 2.86 | 44.6 mm |
| 29T | 2.76 | 2.76 | 46.2 mm |
| 30T | 2.67 | 2.67 | 47.8 mm |
| 31T | 2.58 | 2.58 | 49.4 mm |
| 32T | 2.50 | 2.50 | 51.0 mm |
| 33T | 2.42 | 2.42 | 52.6 mm |
| 34T | 2.35 | 2.35 | 54.2 mm |
| 35T | 2.29 | 2.29 | 55.8 mm |
| 36T | 2.22 | 2.22 | 57.4 mm |
| 37T | 2.16 | 2.16 | 59.0 mm |
| 38T | 2.11 | 2.11 | 60.6 mm |
| 39T | 2.05 | 2.05 | 62.2 mm |
| 40T | 2.00 | 2.00 | 63.8 mm |
| 41T | 1.95 | 1.95 | 65.4 mm |
| 42T | 1.90 | 1.90 | 67.0 mm |
| 43T | 1.86 | 1.86 | 68.6 mm |
| 44T | 1.82 | 1.82 | 70.2 mm |
| 45T | 1.78 | 1.78 | 71.7 mm |
| 46T | 1.74 | 1.74 | 73.3 mm |
| 47T | 1.70 | 1.70 | 74.9 mm |
| 48T | 1.67 | 1.67 | 76.5 mm |
| 49T | 1.63 | 1.63 | 78.1 mm |
| 50T | 1.60 | 1.60 | 79.7 mm |
| 51T | 1.57 | 1.57 | 81.3 mm |
| 52T | 1.54 | 1.54 | 82.9 mm |
| 53T | 1.51 | 1.51 | 84.5 mm |
| 54T | 1.48 | 1.48 | 86.1 mm |
| 55T | 1.45 | 1.45 | 87.7 mm |
| 56T | 1.43 | 1.43 | 89.3 mm |
Shaded rows are the pinions most 1/12 2WD gp setups run on the stock spur. Rollout at a 40.6 mm tire.
What pinion should I run?
Tell us your motor and track and get a starting pinion for the XRAY X12 '26, 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 X12 '26?
It depends on your motor and the track. In the 1/12 2WD gp class, racers gear by final drive ratio: 6T and below near 3.67, 7.5–8.5T near 2.59, 13.5T near 1.72, 17.5T near 1.44. On the X12 '26's stock 80T spur that is about 22T for 6T and below, 31T for 7.5–8.5T, 47T for 13.5T, 56T for 17.5T. Tight tracks gear down, open tracks gear up. For a starting pinion matched to your motor, use the So Dialed Pinion Recommender with the X12 '26 selected.
What is the internal ratio (transmission ratio) of the XRAY X12 '26?
The X12 '26 has an internal ratio of 1:1. Final drive ratio = spur ÷ pinion × 1. With the stock 80T spur, a 22T pinion gives an FDR of 3.64 and a 56T gives 1.43.
How many teeth is the stock spur gear on the XRAY X12 '26?
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
- 450 cst
- Side tubes
- 10,000
What shock oil does the XRAY X12 '26 come with?
Out of the box the X12 '26 runs 450 cst center, 10,000 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 X12 '26 come with?
The kit springs are 1.8-2.0 Silver (#372187) front, 0.6C Silver (#373584) side. Stiffer springs suit high grip and big jumps; softer springs add grip on slick or bumpy tracks.
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