What pitch is the pinon on the M05?
The Tamiya hardened 20T pinion has been a disappointment - after 1 race the thread for the grub screw completely cracked and fell apart. Others at my series tell me it is a common failure. So I have to buy a new pinion, and the Tamiya hardened one was expensive so rather unhappy with it and won't be getting that again!
RE tire size: the most popular size is 55D, why? I would have thought that the larger diameter of the 60D makes for higher top speed. Winter season is over and we are moving outdoors now and i have the choice of either, but am thinking on the longer outdoor tracks I will be slower than the rest if I used 55D. We race handout 540 stock.