Hi everyone. I am currently building a vehicle for a competition but I can't seem to find the right wheels. Between each pair of wheels on this vehicle, I need a single, solid axle. I would like the wheels to be rubber because the vehicle has to move quickly and reverse direction. I also need the axle and the wheel to fall within a certain ratio (3 to 64 or lower). For instance, I found an 8" diameter wheel and 1/4" axle would give me the right ratio, but I can't find any wheels that will fit that diameter axle. Does anyone have any suggestions? I'm open to changing wheel type, but I don't think I can avoid having a strict ratio. Thank you!