>>1084685> motorcycle tyres are going to hold up better than bicycle tyres, but that's probably going to require a custom frame and forkNah, you can use 19" motorcycle rim (use on 125cc kids frames) laced into a mtb hub. It will be the same circumference as a 26" mtb tire and still fit 135mm dropouts. 3"+ wide tires will require special mods/frames - but plenty of people out there on motorcylce rims.
https://endless-sphere.com/forums/viewtopic.php?t=55458and
https://endless-sphere.com/forums/viewtopic.php?f=6&t=65293>>108468120" tires will make more torque - but speed is really dependent on battery pack voltage and gearing.