Often asked: How To Determine Rim Size For Tires?

How do I find out my rim size?

The diameter is measured from the bottom of the bead on one side of the back of the rim to the other side of the back of the rim. The width is measured from the bottom of the bead on the back side of the rim to the bottom of the bead on the front side of the rim.

How do I know if a tire will fit my rim?

Width and diameter are the two factors that determine tire and rim compatibility. For diameter you’ll need to be sure that your tires and wheels are an exact match, e.g. a 215/65R17 tire will only fit on a 17″ diameter wheel. For example a tire size 285/35-19 has a tread width of 9.9″.

What size tires and rims do I need?

Tire widths for a wheel/rim size chart – Equivalency table

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Rim width (inch) Min. tire width (mm) Max. tire width (mm)
Rim width (inch) Min. tire width (mm) Max. tire width (mm)
6,5 185 215
7,0 195 225
7,5 205 235

Do your rims have to be the same size as your tires?

It depends. Wheels and tires are not interchangeable words. Tires are a part of the wheel setup. For instance, your vehicle has a set size of rims, but you can buy different sizes of tires to fit those rims, as long as the middle of the tires is the correct size.

How do you read rim markings?

The first number indicates the number of bolts, or lug nuts used on the wheel (usually four or five). The second number is the Pitch Circle Diameter (PCD). This is an imaginary diameter (in millimeters) of a circle that runs through the center hole of the screws that hold the mounted wheels.

How do you read a wheel offset?

Measurement of wheel offset can be positive or negative and is described in millimeters. An offset of 0 describes a wheel mounting pad positioned in the center of the wheel. A negative offset indicates the mounting pad is is positioned on the hub side of the centerline, closer to the vehicle.

What size tires fit 18×9 wheels?

In this case you can put a 255/40/18 tire on a wheel between the sizes of 18×8. 5 and 18×10. It also indicates that an 18×9 will be a perfect squared look meaning that the tire will not bulge beyond the wheel, and will not be stretched either. If you put this tire on a wheel more narrow than 18×8.

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Can I change tire size without changing rims?

It’s possible to change the size of your tires without actually changing the diameter. One example is if you want larger rims – you can buy tires that compensate for the larger rims by reducing the “height” of the outer tire.

Are all 17 inch rims the same?

Wheel dimensions are measured in diameter (15,16- 17 – inches, etc.) Replacement wheels that are the same size as stock should go on without a problem. You can fit larger diameter and wider wheels, but you may run into clearance issues.

Can I use 235 tires instead of 225?

Yesthat size will work 100% perfectly, as it is the exact same diameter as the 225 /75-16. 235 /70-16 is actually a shorter tire.

Can I use 225 tires instead of 215?

The car will be a little bit more resistant to hydroplaning in the rain, and have a little better traction in wet and slick conditions. Unless you’re exploring the limits of the car’s performance, most drivers probably wouldn’t notice a difference between a 225 and a 215, all else being equal.

Can I put 225 tires on 205 rims?

Short answer, it will be fine. Long answer, it will be fine as long as the load rating is equal or higher capacity. Not many high load rated tires in those sizes, so probably ok. Tire sizes are metric, and are read as follows: 205 (tread width in mm)/65(side wall ratio, so 65% of tread width)R15( rim 15 inch diameter).

Can I put 2 different size tires on my car?

Long story short: Yes, it is a problem to have two tires of different sizes on the front (or back) of your car. Having two different – sized tires on the same axle is generally not a good thing. Sometimes, people choose to put larger tires on the rear axle of their vehicle for handling reasons, cosmetic reasons, etc.

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Can you put a 19 inch tire on a 20 inch rim?

Yes you can, provided you keep the overall tire circumference the same. For instance, I also swapped from 18 to 20 inch wheels, but the tires changed in diameter and profile as well. On the 18’s, the OEM front tires are 245/45/18, whereas they are 255/35/ 20 on the 20 inch wheels.

Can you put 18 inch tires on 17 inch rims?

No, a tire with a 17 or 18 ″ diameter will not work on a rim with a 17.5″ diameter. Putting a 17 ″ tire on the rim will tear it up and the bead will not seat if you attempt to put the 18 ″ tire on the rim. You will never get it to take and hold air.

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