Ask Miles, our Setup AI that’s been trained on the SBX-425.
Setups
Gearing
Stock gearing for the Corally SBX-425, with common pinions and their ratios.
| Pinion | Spur ÷ pinion | FDR |
|---|---|---|
| 16T | 5.06 | 12.66 |
| 17T | 4.76 | 11.91 |
| 18T | 4.50 | 11.25 |
| 19T | 4.26 | 10.66 |
| 20T | 4.05 | 10.13 |
| 21T | 3.86 | 9.64 |
| 22T | 3.68 | 9.20 |
| 23T | 3.52 | 8.80 |
| 24T | 3.38 | 8.44 |
| 25T | 3.24 | 8.10 |
| 26T | 3.12 | 7.79 |
| 27T | 3.00 | 7.50 |
| 28T | 2.89 | 7.23 |
Shaded rows are the pinions most 1/10 4WD buggy setups run on the stock spur.
What pinion should I run?
Tell us your motor and track and get a starting pinion for the Corally SBX-425, with the range racers in the class run.
Get a recommendation →Shop pinion gears at AMain →What pinion gear should I use on the Corally SBX-425?
It depends on your motor and the track. In the 1/10 4WD buggy class, racers gear by final drive ratio: 6T and below near 10.66, 7.5–8.5T near 10.00, 13.5T near 7.95. On the SBX-425's stock 81T spur that is about 19T for 6T and below, 20T for 7.5–8.5T, 25T for 13.5T. Tight tracks gear down, open tracks gear up. For a starting pinion matched to your motor, use the So Dialed Pinion Recommender with the SBX-425 selected.
What is the internal ratio (transmission ratio) of the Corally SBX-425?
The SBX-425 has an internal ratio of 2.5:1. Final drive ratio = spur ÷ pinion × 2.5. With the stock 81T spur, a 16T pinion gives an FDR of 12.66 and a 28T gives 7.23.
How many teeth is the stock spur gear on the Corally SBX-425?
81 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 (Carpet). Part numbers link to AMain.
- Front
- Med #00140-075 →
- Rear
- Med #00140-074 →
- Front
- 2 x 1.6mm
- Rear
- 2 x 1.7mm
What springs does the Corally SBX-425 come with?
The kit springs are Med (#00140-075) front, Med (#00140-074) rear. Stiffer springs suit high grip and big jumps; softer springs add grip on slick or bumpy tracks.
Setup Help
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