CAN I REPLACE THE 15INCH RIMS ON MY 89 MERCEDES 300CE WITH 20 INCH RIMS AND TIRES?

 

you can go up to 18" wheels for your car, tire size for this wheel is 215/40-18 or 225/40-18. personally, i like aspect ratios of "50" or better, go below 50 and you risk wheel/tire damage. i had a friend with 40's and he always was riding on a flat, and he didn't know it! i'd say "hey Maui, you know you got a flat?" "not again!"

i'd recommend 17" wheels and 215/50-17 tires, if you want 20's you'd have to paint the rubber on the rims.