Will smith

Hi,

I have 2 yokomo bd7s (stock and superstock)

Here in NZ we ran 21.5 blinky for stock and 13.5 boosted for superstock

Now I need some pinion/spur combo suggestions

both cars for tight small track and med-high speed track

Currently i am using sp v3.0 for the 21.5 and reedy sonic for the 13.5

I know there lots of variables for what im asking but im just looking for a good base to start from for both cars. Or at least point me towards the right direction.

Any help would be appreciated

Thanks