Ask Miles, our Setup AI that’s been trained on the Slash Mudboss Dirt Oval.
Setups
Have a setup for the Slash Mudboss Dirt Oval?
Share your setup sheet with the community — we'll fill in the details automatically.
Gearing
Stock gearing for the Traxxas Slash Mudboss Dirt Oval, with common pinions and their ratios.
| Pinion | Spur ÷ pinion | FDR |
|---|---|---|
| 15T | 5.73 | 15.59 |
| 16T | 5.38 | 14.62 |
| 17T | 5.06 | 13.76 |
| 18T | 4.78 | 13.00 |
| 19T | 4.53 | 12.31 |
| 20T | 4.30 | 11.70 |
| 21T | 4.10 | 11.14 |
| 22T | 3.91 | 10.63 |
| 23T | 3.74 | 10.17 |
| 24T | 3.58 | 9.75 |
| 25T | 3.44 | 9.36 |
| 26T | 3.31 | 9.00 |
| 27T | 3.19 | 8.66 |
| 28T | 3.07 | 8.35 |
| 29T | 2.97 | 8.07 |
| 30T | 2.87 | 7.80 |
| 31T | 2.77 | 7.55 |
| 32T | 2.69 | 7.31 |
| 33T | 2.61 | 7.09 |
| 34T | 2.53 | 6.88 |
| 35T | 2.46 | 6.68 |
What pinion should I run?
Tell us your motor and track and get a starting pinion for the Traxxas Slash Mudboss Dirt Oval, with the range racers in the class run.
Get a recommendation →Shop pinion gears at AMain →What pinion gear should I use on the Traxxas Slash Mudboss Dirt Oval?
It depends on your motor and the track. A hotter motor (lower turns, higher Kv) takes a smaller pinion; a tight track wants a lower gear than an open one. Start near the middle of the pinions the Slash Mudboss Dirt Oval shipped with, run a few minutes, and check motor temperature before going up a tooth. The So Dialed Pinion Recommender gives a starting pinion for your motor where we have class data.
What is the internal ratio (transmission ratio) of the Traxxas Slash Mudboss Dirt Oval?
The Slash Mudboss Dirt Oval has an internal ratio of 2.72:1. Final drive ratio = spur ÷ pinion × 2.72. With the stock 86T spur, a 15T pinion gives an FDR of 15.59 and a 35T gives 6.68.
How many teeth is the stock spur gear on the Traxxas Slash Mudboss Dirt Oval?
86 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 (Slash Kit Setup). Part numbers link to AMain.
- Front
- 50 wt
- Rear
- 60 wt
- Front
- Kit #TRA2458 →
- Rear
- Kit #TRA3757 →
- Front
- 2-hole
- Rear
- 2-hole
What shock oil does the Traxxas Slash Mudboss Dirt Oval come with?
Out of the box the Slash Mudboss Dirt Oval runs 50 wt front, 60 wt rear (Traxxas oil), 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 Traxxas Slash Mudboss Dirt Oval come with?
The kit springs are Kit (#TRA2458) front, Kit (#TRA3757) rear. Stiffer springs suit high grip and big jumps; softer springs add grip on slick or bumpy tracks.
Setup Help
All Oval Race Cars →
Free to start · iOS & Android
Setup App & Race Log
Your Traxxas Slash Mudboss Dirt Oval is in the RC Setup App
Save every setup change you make to your Traxxas Slash Mudboss Dirt Oval, get AI tuning answers for that exact car, and log your races — at the track or back in the pits.
- Setup Tracking
- AI Mechanic answers
- Find & Share Setups
- Race Log
- Gear Ratio Calculator
- Free to use
