Setups
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Gearing
Stock gearing for the Race Opt MTS FFV4S 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 FFV4S 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 FFV4S 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 FFV4S 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 FFV4S Dolphin selected.
What is the internal ratio (transmission ratio) of the Race Opt MTS FFV4S Dolphin?
The MTS FFV4S 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 FFV4S Dolphin?
84 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
- 500 cst
- Rear
- 500 cst
- Front
- 2-hole
- Rear
- 2-hole
What shock oil does the Race Opt MTS FFV4S Dolphin come with?
Out of the box the MTS FFV4S Dolphin runs 500 cst front, 500 cst rear, on 2-hole front, 2-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 Race Opt MTS FFV4S Dolphin come with?
The kit springs are 1.4mm 3.0kg Silver (#129455) front, 1.4mm 3.0kg Silver (#129455) rear. Stiffer springs suit high grip and big jumps; softer springs add grip on slick or bumpy tracks.
Setup Help
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Setup App & Race Log
Your Race Opt MTS FFV4S Dolphin is in the RC Setup App
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