Which Lehner

[glassdoctor]

I think the 2200kv and 12,14,16 pinions would give you a good range to work with. 16/46 would be stupid fast... maybe too fast for racing if that's possible :)
A really fast nitro might top out near the same speed, mid 40's... but you will acclerate so much harder it won't be funny.

I think the finned can Neus start to rub on the diff cups with an 11T pinion... or maybe a 12T, I can't remember. But if it does, just file the first fin and it's all good. I would guess even a 10T could work... I ran a 10T with a Hacker C50 fat can...