Setups
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Gearing
Stock gearing for the Schumacher Mi7/Mi7 Pro, with common pinions and their ratios.
| Pinion | Spur ÷ pinion | FDR |
|---|---|---|
| 20T | 4.25 | 7.73 |
| 21T | 4.05 | 7.36 |
| 22T | 3.86 | 7.02 |
| 23T | 3.70 | 6.72 |
| 24T | 3.54 | 6.44 |
| 25T | 3.40 | 6.18 |
| 26T | 3.27 | 5.94 |
| 27T | 3.15 | 5.72 |
| 28T | 3.04 | 5.52 |
| 29T | 2.93 | 5.33 |
| 30T | 2.83 | 5.15 |
| 31T | 2.74 | 4.98 |
| 32T | 2.66 | 4.83 |
| 33T | 2.58 | 4.68 |
| 34T | 2.50 | 4.54 |
| 35T | 2.43 | 4.42 |
| 36T | 2.36 | 4.29 |
| 37T | 2.30 | 4.18 |
| 38T | 2.24 | 4.07 |
| 39T | 2.18 | 3.96 |
| 40T | 2.13 | 3.86 |
| 41T | 2.07 | 3.77 |
| 42T | 2.02 | 3.68 |
| 43T | 1.98 | 3.59 |
| 44T | 1.93 | 3.51 |
| 45T | 1.89 | 3.43 |
| 46T | 1.85 | 3.36 |
| 47T | 1.81 | 3.29 |
| 48T | 1.77 | 3.22 |
| 49T | 1.73 | 3.15 |
| 50T | 1.70 | 3.09 |
| 51T | 1.67 | 3.03 |
| 52T | 1.63 | 2.97 |
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 Schumacher Mi7/Mi7 Pro, with the range racers in the class run.
Get a recommendation →Shop pinion gears at AMain →What pinion gear should I use on the Schumacher Mi7/Mi7 Pro?
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 Mi7/Mi7 Pro's stock 85T spur that is about 21T for 6T and below, 34T for 13.5T, 34T for 17.5T, 42T 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 Mi7/Mi7 Pro selected.
What is the internal ratio (transmission ratio) of the Schumacher Mi7/Mi7 Pro?
The Mi7/Mi7 Pro has an internal ratio of 1.818:1. Final drive ratio = spur ÷ pinion × 1.818. With the stock 85T spur, a 20T pinion gives an FDR of 7.73 and a 52T gives 2.97.
How many teeth is the stock spur gear on the Schumacher Mi7/Mi7 Pro?
85 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.
- Rear
- 5,000 cst
What springs does the Schumacher Mi7/Mi7 Pro come with?
The kit springs are Mi6 EVO 3.0 (#U7539) front, Mi6 EVO 3.0 (#U7539) rear. Stiffer springs suit high grip and big jumps; softer springs add grip on slick or bumpy tracks.
What diff fluid does the Schumacher Mi7/Mi7 Pro come with?
The kit diff fluid is 5,000 cst rear. Thicker front adds steering on power; thicker center sends more drive rearward; thicker rear stabilizes the car under throttle.
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