The tire size comparison application is a user-friendly tool that allows you to quickly and easily compare the sizes of different tires. Overall, the tire size comparison application is a useful tool for anyone looking to make informed decisions when selecting tires for their vehicle. Compare Tire - Diameter - Width - Tire Circumference - Sidewall - Speedometer Error For both FWD & RWD vehicles (front & rear wheel driven) - Calculate Power from Engine to Wheels - Calculate Power from Wheels to