345/30R21 tires
1 tire line. 345/30R21 tires sized to your wheels and your car.
About 345/30R21 tires
A 345/30R21 is the kind of size that comes with a big wheel. The sidewall is short, so the steering gets crisper and you'll hear every pothole. A tire size only means something next to a wheel width and a car, because the wheel decides what'll mount and the car decides what'll fit.
Tell us the car and the wheel set and you'll only see the 345/30R21 lines that mount and fit.
Common questions
- What does 345/30R21 mean?
- Width first, then sidewall, then the wheel it goes on. The tread's 345 mm across, and the sidewall is 30 percent of that. The R just means it's a radial, like everything else on the road now. Stood next to a tape it's about 29.1 inches tall.
- Will 345/30R21 fit your car?
- Tell us the year, make and model and you'll only see sizes that suit it. The wheel has to be wide enough to carry the tread, and the overall height has to stay near where the car started.
- What wheel width fits 345/30R21?
- It's a range, not one number. Anything from about 11.5 to 13 inches wide will take it, and every product page shows what that line's maker approves. Pick a wheel set first and the sizes narrow to it.