The biggest problem with belt drives is that the rear wheel has to be 100% centered and aligned in the rear drop outs or else the belt will keep falling off the rear sprocket. This was a problem when the belt drives first came out. I don't know if the manufacturers corrected the problem or not...There is nothing wrong with chain drives. Chains are simple and easy to maintain or replace when they wear out. Why waste money on something that has no advantages...As for patching a tube without removing a wheel. Really ?? ...Try patching your tube in sub-freezing temps with snow and sleet or pouring rain.