[suicideneil]

I think its all to do with gear ratios & the torque required. For example, an Emaxx tranny gives a truck about a 25:1 reduction ratio, since it needs a lot of torque at the wheels fro weedy 550 motors. Alot of vehicles which just use a centre diff/spur arrangement are generally alot lighter, so donr need so much torque at the wheels; that, or they have a stonking greatbig nitro/BL motor with a low kv rating so not as much speed reduction is required in the form of gearing down. I think....