Originally Posted by e_lm_70
Take on eBay the ToBee gears for the M03 ... you can go as long as 4.63 !
With a the 34T spoor you will have a quite nice choise of gear for 27T motors:
23T -> 4.63
21T -> 5.07
19T -> 5.61
With a 23T pinion and a silver stock tamiya motor the mini should be flying
e_lm_70
I have the 34T Tobee Craft spur, and it's quite a bit smaller than the stock 37T spur. So with a big 23T pinion, it is almost a perfect fit using the 19T mounting holes. I've enlarged one of the 19T holes slightly for a better mesh.
With 60D tyres it gets a 40mm rollout. It should go pretty good, I haven't driven it yet in this setup tho
My car's an M04M though, not a Mini Cooper.