Well the overall diameter is not that far off of the stock wheels and, tires(50 series off road tire)Not enough anyway to hinder it in this manner.The 24's were quite a bit taller and alot heavier.I would estimate them at approx 90lbs a piece.The 20's were alot lighter but,as i said no real gain in performance.This truck is at 2200 rpm's at 80mph,seems like really tall gearing.