For instance the tires on my car reads245/R45What does that mean?
245/R45; The size of the Tire in Millimeters and 'R' means in Radial Belt. It's a sport tire. It's very expensive. There's another thing missing. Size of tire to the wheel rim. The wheel rim size. eg. Size 10, 12, 13, 14, 15, 16, and 17 for cars only. (so far there's no size 11) e.g. Your tire should read 245/R45/15. (Redial Belt) Meaning; Your tire is 245 millimeters x Radial Belt 45 millimeters wheel rim size 15. (e.g. high, broad, thin in height, etc). Your Tire is very broad and very thin in height. You're using sporty tire to the wheel rim and looks very sporty.
Treadwidth/Type/Height of Profile/Diameter Let's breakdown a typical tire size: 245/R45/17 245 Refers to the width of the tire in millimeters. R refers to the fact that it is a tire with a radial belt type of tire construction. 45 is the height of the tire sidewall, from the rim bead to the top of the tread -- expressed as a percentage of the tire's width. So 45 in this case means 45% of 245 mm or about 110mm in sidewall height. 17 refers to the size rim that the tire is designed for. Hope that helps! Take care.
