Originally posted by dhiracing.com
The biggest 48p spur a barracuda can take is 72, if I am not mistaken. So I suggest for stock and modified racing nos 70, 71 or 72. Then you set the final gearing ratio with a different pinion ey
hey you can run a 68 spur all the way to 75 with no mods standard from the factory on the R2s
and in pinion from 14 teeth to 42 teeth
thats what the maunel has got in it