MST TCR-M

Q&A, gearing, manual, and guides

On-road•Touring/GT•1/10 scale•2WD

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Gearing

Stock gearing for the MST TCR-M, with common pinions and their ratios.

Stock spur

75T

Internal ratio

1:1

Class

1/10 2WD touring/gt

No class gearing data yet

Pinion	Spur ÷ pinion	FDR
15T	5.00	5.00
16T	4.69	4.69
17T	4.41	4.41
18T	4.17	4.17
19T	3.95	3.95
20T	3.75	3.75
21T	3.57	3.57
22T	3.41	3.41
23T	3.26	3.26
24T	3.13	3.13
25T	3.00	3.00
26T	2.88	2.88
27T	2.78	2.78
28T	2.68	2.68
29T	2.59	2.59
30T	2.50	2.50
31T	2.42	2.42
32T	2.34	2.34
33T	2.27	2.27
34T	2.21	2.21
35T	2.14	2.14

What pinion should I run?

Tell us your motor and track and get a starting pinion for the MST TCR-M, with the range racers in the class run.

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What pinion gear should I use on the MST TCR-M?

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 TCR-M 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 MST TCR-M?

The TCR-M has an internal ratio of 1:1. Final drive ratio = spur ÷ pinion × 1. With the stock 75T spur, a 15T pinion gives an FDR of 5.00 and a 35T gives 2.14.