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Gearing
Stock gearing for the Tamiya TT-02 Type-SR, with common pinions and their ratios.
| Pinion | Spur ÷ pinion | FDR |
|---|---|---|
| 20T | 3.50 | 9.10 |
| 21T | 3.33 | 8.67 |
| 22T | 3.18 | 8.27 |
| 23T | 3.04 | 7.91 |
| 24T | 2.92 | 7.58 |
| 25T | 2.80 | 7.28 |
| 26T | 2.69 | 7.00 |
| 27T | 2.59 | 6.74 |
| 28T | 2.50 | 6.50 |
| 29T | 2.41 | 6.28 |
| 30T | 2.33 | 6.07 |
| 31T | 2.26 | 5.87 |
| 32T | 2.19 | 5.69 |
| 33T | 2.12 | 5.52 |
| 34T | 2.06 | 5.35 |
| 35T | 2.00 | 5.20 |
| 36T | 1.94 | 5.06 |
| 37T | 1.89 | 4.92 |
| 38T | 1.84 | 4.79 |
| 39T | 1.79 | 4.67 |
| 40T | 1.75 | 4.55 |
| 41T | 1.71 | 4.44 |
| 42T | 1.67 | 4.33 |
| 43T | 1.63 | 4.23 |
| 44T | 1.59 | 4.14 |
| 45T | 1.56 | 4.04 |
| 46T | 1.52 | 3.96 |
| 47T | 1.49 | 3.87 |
| 48T | 1.46 | 3.79 |
| 49T | 1.43 | 3.71 |
| 50T | 1.40 | 3.64 |
| 51T | 1.37 | 3.57 |
| 52T | 1.35 | 3.50 |
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 Tamiya TT-02 Type-SR, with the range racers in the class run.
Get a recommendation →Shop pinion gears at AMain →What pinion gear should I use on the Tamiya TT-02 Type-SR?
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 TT-02 Type-SR's stock 70T spur that is about 25T for 6T and below, 40T for 13.5T, 40T for 17.5T, 50T 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 TT-02 Type-SR selected.
What is the internal ratio (transmission ratio) of the Tamiya TT-02 Type-SR?
The TT-02 Type-SR has an internal ratio of 2.6:1. Final drive ratio = spur ÷ pinion × 2.6. With the stock 70T spur, a 20T pinion gives an FDR of 9.10 and a 52T gives 3.50.
How many teeth is the stock spur gear on the Tamiya TT-02 Type-SR?
70 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.
- Front
- 900 cst
- Rear
- 900 cst
- Front
- Gold #19805676 →
- Rear
- Gold #19805676 →
- Front
- 1-hole
- Rear
- 1-hole
What shock oil does the Tamiya TT-02 Type-SR come with?
Out of the box the TT-02 Type-SR runs 900 cst front, 900 cst rear, on 1-hole front, 1-hole 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 Tamiya TT-02 Type-SR come with?
The kit springs are Gold (#19805676) front, Gold (#19805676) rear. Stiffer springs suit high grip and big jumps; softer springs add grip on slick or bumpy tracks.
Setup Help
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