please note, 40's are not good for racing 90% of the time, so if you plan to race buy standard size. The 40's are unstable and unpredictabe on most tracks unless the track it relly bumpy and rutted out. This is just my experience with them. You will have faster lap times with the standards at tracks around here. If you are just planning on bashing, buy what you like.
edit relly = really
edit relly = really
Mugen MBX5T
RBS5
RB2045
Futaba 3PM
Hitec 5955, 5965
RBS5
RB2045
Futaba 3PM
Hitec 5955, 5965