BattCave JOK3R

Q&A, gearing, manual, and guides

On-road•Touring/GT•1/12 scale•2WD

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Gearing

Stock gearing for the BattCave JOK3R, with common pinions and their ratios.

Stock spur

48T

Internal ratio

1:1

Typical pinion

32–36T

1/12 2WD touring/gt setups. For your motor and track →

Pinion	Spur ÷ pinion	FDR	Rollout
30T	1.60	1.60	84.4 mm
31T	1.55	1.55	87.2 mm
32T	1.50	1.50	90.1 mm
33T	1.45	1.45	92.9 mm
34T	1.41	1.41	95.7 mm
35T	1.37	1.37	98.5 mm
36T	1.33	1.33	101.3 mm
37T	1.30	1.30	104.1 mm
38T	1.26	1.26	106.9 mm

Shaded rows are the pinions most 1/12 2WD touring/gt setups run on the stock spur. Rollout at a 43 mm tire.

What pinion should I run?

Tell us your motor and track and get a starting pinion for the BattCave JOK3R, with the range racers in the class run.

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What pinion gear should I use on the BattCave JOK3R?

It depends on your motor and the track. Racers in the 1/12 2WD touring/gt class run a 32–36 tooth pinion in most setups, usually on a 66T spur for a final drive ratio near 1.96. Hotter motors (lower turns, higher Kv) take a smaller pinion; tight tracks gear down, open tracks gear up. For a starting pinion matched to your motor, use the So Dialed Pinion Recommender with the JOK3R selected.

What is the internal ratio (transmission ratio) of the BattCave JOK3R?

The JOK3R has an internal ratio of 1:1. Final drive ratio = spur ÷ pinion × 1. With the stock 48T spur, a 30T pinion gives an FDR of 1.60 and a 38T gives 1.26.

How many teeth is the stock spur gear on the BattCave JOK3R?

48 teeth. Changing the spur moves every pinion's ratio at once; most racers leave the spur and tune with the pinion.

Setup Help

Reference chart — Touring / GT

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