The easiest way to measure a tire's rim size is by looking on the side of the tire for the information. Look for a tire's rim size to be the last number listed on a tire with help from a certified master mechanic in this free video on car maintenance.
Good afternoon. My name is Tom Brintzenhofe, certified master mechanic, out of Redding, PA. Today, we're going to talk about how to measure your vehicle's rim size. The easiest way of doing this, if you can find yourself a decent tire, that's not too abused on your vehicle, is to find your tire size, it's marked on the side. You have a whole bunch of information here, regarding your tire. It's all around the outside of your, the inside edge of your tire here, right where it connects onto your rim, but right over here, you have your tire size, the width size, and your rim size. Now, the first number, gives your a P, it's 235. Now, that's the width of your tire. Your 65 here, is your sidewall height, and the 17 on the end, the rim size is always on the end. It's your last two digits, so if it's 13, 14, 15, 16, or 17, it's always on the trailer, the last two digits here, and all that is, is your measurement from one point here, to one point here. This one here is particularly, 17 inches long. The only other information you might need, is your bolt pattern. This one here particularly, is a five bolts, and if you measure from here, your furthest point across, whether it's these two or these two, is, we'll say this is four and a quarter, so it would be five by four and a quarter, a seventeen inch rim. The other one you would have to keep in mind, is your rim width. Now, this one here, is typically an eight inch rim, but that's basically all you need to do. You measure across here, just eight inches, across here to here, and it's probably about four and a half, four and a quarter, and then your total rim is right here, your last two numbers on your tire. If you have any questions outside of that, if you can't find it anywhere on here, if you look on the inside of your driver's side door, it's usually on a pillar on the inside of the door, is a white sticker. It will tell you what specifically rim size and tire size you need, for that vehicle. If you have any other questions after that, contact your local dealership, give them your VIN number, and they'll be able to help you out. That's about all there is to it, and finding yourself your vehicle's rim size.