How To Measure Rim Width? (With Expert Tips)

There are a few ways to measure rim width. The easiest is to use a ruler or yardstick and measure the circumference of the wheel at its widest point.

Another way is to use a rim gauge. Rim gauges are specially designed to measure rim width, and they usually come in sets of three.

To measure the width of a wheel using a rim gauge, you first need to remove the tire or tube from the wheel. Then you place one arm of the gauge against one side of the wheel and screw it into place.

The other arm measures how wide that side is compared with the widest part of the other arm. Here’s what you need to know about measuring rim width and which one you should get.

What’s the most accurate way to measure rim width?

What's the most accurate way to measure rim width?

There is no one definitive answer to this question since rim width can be measured in a variety of ways. However, some methods that may be more accurate than others include:

  • Measuring the width of the wheel at the widest point.
  • Measuring the width of the wheel at the middle of its tread.
  • Measuring the width of the wheel at its narrowest point. In the case of cars and trucks with a single tire, there is no perfect way to measure rim width.

How To Measure Rim Width

Method 1

how to measure car rim width

To measure a rim’s width, you’ll need either a ruler or yardstick and a rim gauge. Simply place the measuring device against the widest part of the wheel and screw it into place.

The other arm of the gauge should then read how wide that specific area is compared to the widest point on that particular instrument.

If using a yardstick, simply hold it at waist height and look for where your tire would sit if mounted on said wheel. If using a ruler, the measurement should be taken from the center of one edge to the opposite edge.

Method 2

how to measure rims size

In order to determine a rim’s bolt pattern, you’ll need the dimensions of your car and the wheels it will be using. Once you have those details, use this chart to find out which size bolt goes where:

The X-size is for 15×6 inches or 33×15 cm rims only! The Y-size bolts are for 16×7 inches or 40×18 cm rims.

Once you know which bolt size goes where measure the distance between the holes on each wheel and use that number to find out what size hex head bolts, you’ll need. Again, make sure to get a set of 16×7 inch or 40×18 cm bolts – NOT 15×6 inches or 33×15 cm.

If all of this is too confusing, don’t worry – many retail stores carry wheels and tires in both bolt patterns.

Method 3

There are actually two different rim widths that you’ll encounter on wheels – 6 inches and 5.5 inches. Most vehicles use the 5.5-inch rim, but for cars with an offset wheel such as a Chevrolet Suburban or Cadillac Escalade, the manufacturer will install a 6-inch-wide wheel in order to compensate for the car’s lowered ride height.

In order to determine which size, you need, subtract .8125 inches from the width of the offset wheel. For example, if your car has an offset wheel that measures 19 inches wide by .75 inches thick, you would need a 5.25-inch rim to fit it correctly.

Now that you know the circumference and width of your particular rim, you can find out the backspacing by subtracting 1 inch from the inside diameter of the bolt pattern. So, for a 22-inch-diameter bolt pattern, the backspacing would be 21.625 inches.

Finally, you’ll need to find the size of hex head bolts that will fit your wheel. The bolt pattern typically has 6 holes per inch, so a .8125-inch-diameter bolt would need a 7/64-inch hex nut.

What does rim width mean?

What does rim width mean?

Rim width is the measured edge around your wheel. The rim can be either 6 inches or 5.5 inches wide, and this dictates which backspacing you need to know. If your car or truck has an offset wheel, you might also need to use the 6-inch width.

If a rim is described as radial, then it is wider at one end than the other, and there will be a bead seat along that part of the edge where no spoke holes are drilled (the inside corner). This describes wheels used on flatbed trailers rather than cars and trucks.

Rim depth only affects rough road conditions when it comes to comparing tire pressure. A deeper rim means more flexible materials and therefore greater resistance to bending, warping, and blowout when under extreme loading; however, this depth also adds weight.

How do you measure the rim size?

how to measure rims size

Rim width is the width of a wheel from one side to the other. Measuring the rim diameter is an easy process you can do at home with a few basic tools.

Sidewall measurements give drivers a broad sense of durability, tire height, and performance expectations when comparing tires.

The rim width is the most important factor in measuring a tire. If you are thinking about buying new tires, call a local tire shop and ask them to measure your rim widths for you so you can compare prices online.

The tire size is located on the sidewall of each tire and reads something like this: ‘P205/55R16’ The first number before the forward-slash (/) is the width of the tire (in millimeters). The second number, between the forward-slash and after the letter R, is the aspect ratio of your vehicle’s tire.

To measure the rim width, you will simply take a tape measure and place one edge at the inside of the rim on one side and then measure to the inner edge of the rim on the opposite side. Take your measurement and use our handy Rim Size Calculator to determine what size you need.

How do you measure the tire width?

How do you measure the tire width?

The width of your tires is measured in millimeters from sidewall to sidewall, and this measurement is known as the tire width. The rim size refers to the diameter of the wheel, measured in inches.

The tire sidewall dimensions correspond to the aspect ratio or cross-section height of the tire expressed as a percentage of the width. The rim width must be taken into account when choosing a tire because it influences overall tire performance.

The dimensions of a tire are heavily dependent on rim width. While the aspect ratio is an expression of a tire’s sidewall height as a percentage of its width. How wide a tire will actually measure is contingent upon how wide its rim is.

For example, if you install a 215/50-17 tire on a 6-inch-wide alloy wheel at the stock air pressure, that tire will likely measure in the range of 8.5 to 9 inches wide, instead of the 8.9 to 9.3, it would be if installed on a 7- or 8-inch-wide rim. Rim size matters because it influences the width and shape of your SUV or truck’s contact patch.

How much does the width of a tire depend on rim width?

How much does the width of a tire depend on rim width?

Tire width is a measurement made up of two components: the tire’s internal section and the tire’s external section. Both these sections vary, depending on whether they are measured from the inside or from the outside of the tire.

To understand how to measure tire width, it can help to think of a highly inclined cone – in between top and bottom lies the base.

The rim is positioned on the base of the tire. Rim diameter is a fixed value that cannot be affected by tire pressure and must always remain constant.

There are a few different ways to measure your rim width. You can use a digital caliper to get the most accurate reading, or you can use a standard ruler if you do not have access to a caliper. It is best to start by measuring the outside of the rim, which includes the tire bead.

How can I make sure my measurements are correct and accurate?

How can I make sure my measurements are correct and accurate?

There are a few things that you can do to make sure your measurements are accurate and correct.

The first thing is to use a calibrated measuring tape. This will ensure that your measurements are consistent and accurate every time.

Another way to make sure your measurements are accurate is to use a digital scale. This will allow you to measure weight in grams and ounces, as well as volume in milliliters or liters.

Finally, it is important to take pictures of the items that you are measuring so that you can track their progress over time. This will help you to improve your accuracy and consistency when measuring future items.

Frequently Asked Questions

1. Can you find out the rim size without taking off the tire? 

It is not possible to find out the rim size without taking off the tire. This is because the rim size is printed on a sticker that is attached to the inside of the wheel.

2. What are some other ways to measure rim width besides using a tape measure?

There are a few other ways to measure rim width besides using a tape measure. One way is to use a ruler to measure the width of the tire at the edge of the tread. Another way is to take a picture of your tire and use a computer program to measure the width of the tire.

3. Why do I need to check the width of the rim?

Checking the width of the rim allows you to ensure that you are buying a rim that will fit your car or truck properly.

If the rim is too wide, it will not fit within your wheel’s bolt pattern. If the rim is too narrow, it may be difficult to put on and could damage your car or truck.

4. How do you measure tire sidewall dimensions?

In order to calculate the overall diameter of a tire, you must first determine the sidewall height. Tire manufacturers include this measurement in their product descriptions, but if you don’t have your tires in front of you and are wondering how to measure tire rim width at home, all you need is a ruler.


Tire width is a very important measurement because it affects the overall stability and performance of your vehicle. By taking accurate measurements and following a few simple tips, you can ensure that your tire widths are always correct.

In summary, to measure your tire’s width, you will need to first use a digital caliper or ruler to get the outside measurement of the rim.

Next, you will need to measure the internal section of the tire using either an online calculator or a standard ruler. Finally, take pictures of all of your measurements so that you can track their progress over time.

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