Setups
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Gearing
Stock gearing for the Serpent SRX8E, with common pinions and their ratios.
| Pinion | Spur ÷ pinion | FDR |
|---|---|---|
| 12T | 3.67 | 12.41 |
| 13T | 3.38 | 11.46 |
| 14T | 3.14 | 10.64 |
| 15T | 2.93 | 9.93 |
| 16T | 2.75 | 9.31 |
| 17T | 2.59 | 8.76 |
| 18T | 2.44 | 8.27 |
| 19T | 2.32 | 7.84 |
Shaded rows are the pinions most 1/8 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 Serpent SRX8E, with the range racers in the class run.
Get a recommendation →Shop pinion gears at AMain →What pinion gear should I use on the Serpent SRX8E?
It depends on your motor and the track. In the 1/8 4WD buggy class, racers gear by final drive ratio: 1800–2300 kV near 10.06. On the SRX8E's stock 44T spur that is about 15T for 1800–2300 kV. Tight tracks gear down, open tracks gear up. For a starting pinion matched to your motor, use the So Dialed Pinion Recommender with the SRX8E selected.
What is the internal ratio (transmission ratio) of the Serpent SRX8E?
The SRX8E has an internal ratio of 3.385:1. Final drive ratio = spur ÷ pinion × 3.385. With the stock 44T spur, a 12T pinion gives an FDR of 12.41 and a 19T gives 7.84.
How many teeth is the stock spur gear on the Serpent SRX8E?
44 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
- 300 cst
- Front
- 7,000 cst
- Center
- 7,000 cst
- Rear
- 5,000 cst
What shock oil does the Serpent SRX8E come with?
Out of the box the SRX8E runs 500 cst front, 300 cst rear (Serpent oil), on 6 holes (#600818) front, 6 holes (#600818) 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 Serpent SRX8E come with?
The kit springs are 4.9 lb Pink (#600856) front, 3.4 lb Pink (#600863) rear. Stiffer springs suit high grip and big jumps; softer springs add grip on slick or bumpy tracks.
What diff fluid does the Serpent SRX8E come with?
The kit diff fluid is 7,000 cst front, 7,000 cst center, 5,000 cst rear. Thicker front adds steering on power; thicker center sends more drive rearward; thicker rear stabilizes the car under throttle.
Setup Help
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Setup App & Race Log
Your Serpent SRX8E is in the RC Setup App
Save every setup change you make to your Serpent SRX8E, get AI tuning answers for that exact car, and log your races — at the track or back in the pits.
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