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Setups
Gearing
Stock gearing for the CRC MetriCKs FMJ, with common pinions and their ratios.
| Pinion | Spur ÷ pinion | FDR | Rollout |
|---|---|---|---|
| 22T | 3.27 | 3.27 | 39.0 mm |
| 23T | 3.13 | 3.13 | 40.7 mm |
| 24T | 3.00 | 3.00 | 42.5 mm |
| 25T | 2.88 | 2.88 | 44.3 mm |
| 26T | 2.77 | 2.77 | 46.1 mm |
| 27T | 2.67 | 2.67 | 47.8 mm |
| 28T | 2.57 | 2.57 | 49.6 mm |
| 29T | 2.48 | 2.48 | 51.4 mm |
| 30T | 2.40 | 2.40 | 53.1 mm |
| 31T | 2.32 | 2.32 | 54.9 mm |
| 32T | 2.25 | 2.25 | 56.7 mm |
| 33T | 2.18 | 2.18 | 58.5 mm |
| 34T | 2.12 | 2.12 | 60.2 mm |
| 35T | 2.06 | 2.06 | 62.0 mm |
| 36T | 2.00 | 2.00 | 63.8 mm |
| 37T | 1.95 | 1.95 | 65.5 mm |
| 38T | 1.89 | 1.89 | 67.3 mm |
| 39T | 1.85 | 1.85 | 69.1 mm |
| 40T | 1.80 | 1.80 | 70.9 mm |
| 41T | 1.76 | 1.76 | 72.6 mm |
| 42T | 1.71 | 1.71 | 74.4 mm |
| 43T | 1.67 | 1.67 | 76.2 mm |
| 44T | 1.64 | 1.64 | 77.9 mm |
| 45T | 1.60 | 1.60 | 79.7 mm |
| 46T | 1.57 | 1.57 | 81.5 mm |
| 47T | 1.53 | 1.53 | 83.3 mm |
| 48T | 1.50 | 1.50 | 85.0 mm |
| 49T | 1.47 | 1.47 | 86.8 mm |
| 50T | 1.44 | 1.44 | 88.6 mm |
| 51T | 1.41 | 1.41 | 90.3 mm |
| 52T | 1.38 | 1.38 | 92.1 mm |
| 53T | 1.36 | 1.36 | 93.9 mm |
| 54T | 1.33 | 1.33 | 95.7 mm |
| 55T | 1.31 | 1.31 | 97.4 mm |
| 56T | 1.29 | 1.29 | 99.2 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 CRC MetriCKs FMJ, with the range racers in the class run.
Get a recommendation →Shop pinion gears at AMain →What pinion gear should I use on the CRC MetriCKs FMJ?
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 MetriCKs FMJ's stock 72T spur that is about 20T for 6T and below, 28T for 7.5–8.5T, 42T for 13.5T, 50T 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 MetriCKs FMJ selected.
What is the internal ratio (transmission ratio) of the CRC MetriCKs FMJ?
The MetriCKs FMJ has an internal ratio of 1:1. Final drive ratio = spur ÷ pinion × 1. With the stock 72T spur, a 22T pinion gives an FDR of 3.27 and a 56T gives 1.29.
How many teeth is the stock spur gear on the CRC MetriCKs FMJ?
72 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.
- Side tubes
- 15,000
What shock oil does the CRC MetriCKs FMJ come with?
Out of the box the MetriCKs FMJ runs 15,000 side tubes. That is the kit setup; you will need to adjust it for your track conditions. The RC Setup App can help dial it in.
Setup Help
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Setup App & Race Log
Your CRC MetriCKs FMJ is in the RC Setup App
Save every setup change you make to your CRC MetriCKs FMJ, get AI tuning answers for that exact car, and log your races — at the track or back in the pits.
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