Kyosho RB7

Q&A, gearing, kit settings, manual, and guides

Off-road•Buggy•1/10 scale•2WD

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Gearing

Stock gearing for the Kyosho RB7, with common pinions and their ratios.

Stock spur

76T

Internal ratio

2.6:1

Typical pinion

≤6T ≈ 21T · 7.5–8.5T ≈ 21T · 17.5T ≈ 30T

Class medians on the stock spur. For your motor and track →

Pinion	Spur ÷ pinion	FDR
18T	4.22	10.98
19T	4.00	10.40
20T	3.80	9.88
21T	3.62	9.41
22T	3.45	8.98
23T	3.30	8.59
24T	3.17	8.23
25T	3.04	7.90
26T	2.92	7.60
27T	2.81	7.32
28T	2.71	7.06
29T	2.62	6.81
30T	2.53	6.59
31T	2.45	6.37
32T	2.38	6.17

Shaded rows are the pinions most 1/10 2WD 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 Kyosho RB7, with the range racers in the class run.

Get a recommendation →Shop pinion gears at AMain →

What pinion gear should I use on the Kyosho RB7?

It depends on your motor and the track. In the 1/10 2WD buggy class, racers gear by final drive ratio: 6T and below near 9.40, 7.5–8.5T near 9.22, 17.5T near 6.48. On the RB7's stock 76T spur that is about 21T for 6T and below, 21T for 7.5–8.5T, 30T for 17.5T. Tight tracks gear down, open tracks gear up. For a starting pinion matched to your motor, use the So Dialed Pinion Recommender with the RB7 selected.

What is the internal ratio (transmission ratio) of the Kyosho RB7?

The RB7 has an internal ratio of 2.6:1. Final drive ratio = spur ÷ pinion × 2.6. With the stock 76T spur, a 18T pinion gives an FDR of 10.98 and a 32T gives 6.17.

How many teeth is the stock spur gear on the Kyosho RB7?

76 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.

Springs

Front: Gold #XGS003 →
Rear: Gold #XGS013 →

Pistons

Front: 2 x 1.6mm #W5303-09 →
Rear: 2 x 1.7mm #W5303-13 →

What springs does the Kyosho RB7 come with?

The kit springs are Gold (#XGS003) front, Gold (#XGS013) rear. Stiffer springs suit high grip and big jumps; softer springs add grip on slick or bumpy tracks.