I dropped a sphere/neo brushlesss setup in a standard xxx-s (non-graphite)
used a 8000 lipo, hit exactly 40mph on the radar, could have geared ithe crap out of it (maybe get it up to the high 40's , but needed power on an infield section. i ran it with a 3600 and dropped a couple of mph, i could run it about the same with the nitros on the infield section, but lost time on the straight when the nitros hit second gear.