Setups
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Gearing
Stock gearing for the Race Opt MTS FFV4 Dolphin, with common pinions and their ratios.
| Pinion | Spur ÷ pinion | FDR |
|---|---|---|
| 36T | 2.33 | 3.73 |
| 37T | 2.27 | 3.63 |
| 38T | 2.21 | 3.54 |
| 39T | 2.15 | 3.45 |
| 40T | 2.10 | 3.36 |
| 41T | 2.05 | 3.28 |
| 42T | 2.00 | 3.20 |
| 43T | 1.95 | 3.13 |
| 44T | 1.91 | 3.05 |
| 45T | 1.87 | 2.99 |
| 46T | 1.83 | 2.92 |
| 47T | 1.79 | 2.86 |
Shaded rows are the pinions most 1/10 FWD 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 Race Opt MTS FFV4 Dolphin, with the range racers in the class run.
Get a recommendation →Shop pinion gears at AMain →What pinion gear should I use on the Race Opt MTS FFV4 Dolphin?
It depends on your motor and the track. In the 1/10 FWD touring/gt class, racers gear by final drive ratio: 17.5T near 4.51. On the MTS FFV4 Dolphin's stock 84T spur that is about 30T 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 MTS FFV4 Dolphin selected.
What is the internal ratio (transmission ratio) of the Race Opt MTS FFV4 Dolphin?
The MTS FFV4 Dolphin has an internal ratio of 1.6:1. Final drive ratio = spur ÷ pinion × 1.6. With the stock 84T spur, a 36T pinion gives an FDR of 3.73 and a 47T gives 2.86.
How many teeth is the stock spur gear on the Race Opt MTS FFV4 Dolphin?
84 teeth. Changing the spur moves every pinion's ratio at once; most racers leave the spur and tune with the pinion.
Setup Help
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