yea i was kinda on some pain meds when i read that....
this is where you got me tho, the larger tire should be spining slower at the same speeds vs a smaller tire on a car going the same speed. take a down hill durby car, add some tiny wheels on it, there spining like crazy going down that hill (spining faster), now put some big wheels on it, there spining slower but the car is still going down the hill at the same rate. elementry physics.
a larger tire does not need to turn as fast (rpm) to achive the same speed as a smaller wheel on a car going down the road.
to turn both tires at 100 revolutions per min, yes its gonna take more distance to do that with a larger tire, but that does not apply to vehicle speed.