# Question: How do I know my bike rim size?

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## How do I find out my rim size?

Locate the stamped size on the back of the hub on the rim. This is the assigned measured size of the rim, and it is broken into three sizes: diameter, width and bolt pattern. For example, a 14 by 6 by 4.5 reading on the rim indicates that the diameter of the rim is 14 inches, and it will accommodate most 14-inch tires.

## How do you measure bike rims?

Lay your measuring tape or ruler across the rim from one side to the other. Get the largest measurement, between two points directly opposite one another. Slide one end of the tape back and forth along the rim until the measurement is largest.

## Is tire size the same as rim size?

Wheels and tires are not interchangeable words. … 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. That being said, a vehicle with bigger rims will often be able to fit larger tires than other vehicles.

## What do rim size numbers mean?

The wheel diameter (in inches or millimeters) is the fifth set of numbers and letters. What do rim size numbers mean? This number represents the distance between the two bead seat areas where the tire is sealed onto the wheel. The wheel size also includes its width and offset.

## How do you measure rim width?

Luckily, measuring rim width is pretty simple to do! Just take a ruler, yardstick or tape measure and measure the distance from bead seat to bead seat. The rim width is also included in the wheel size, which you can find stamped on the back of the wheel, or in your owner’s manual.

## What size are 650b wheels?

A 650b wheel is one that’s about 27.5 inches in diameter, when measured from tyre edge to tyre edge. This compares to 26in for a standard mountain bike wheel and 29in for so-called ’29er’ wheels (700c road wheels are also 29in in diameter).

## What is the standard size of a bicycle wheel?

29″ / 700c (ISO 622 mm)

The standard modern road bike wheel has an ISO diameter of 622 mm and is referred to as 700c (makes sense, right? /s).

## Can I replace 15 inch wheels with 17 inch?

15″ would usually be used on base models with 16″ or 17″ offered as options on the higher end models. If there is a 17″ option you can use that rim and tire size and be good to go. Many tire store web sites will provide a list of rim and tire options that are safe to use on your make and model of car.

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## Are all 16 inch rims the same?

Common rim sizes include 15, 16 and 17 inches. Rim size will vary depending on the make and model of the car and manufacturers may release different models of the same car with different rim size options.

## Can you put 20 inch rims on 18 inch tires?

The wheel size will not affect your speedometer, the overall tire size will. As long as the overall tire diameter is the same, you won’t have to re calibrate anything. If you use the factory size tires for the 18″ wheels, you should be fine.

## What is J in rim size?

The letters J and H2 in the letter and number combination

The letter “J” means a tyre bead profile. This is the marking used to define the wheel collar profile you should never ignore. Wheel collars and tyres must be compatible.

## How do you read rim markings?

The wheels width is usually written beside the flange shape marking – e.g: 7j, 7.5j, 8.0j. The width of the wheel is basically the area shown on the photo above and it is measured in inches. In other words, the bigger the number, the “thicker” your wheels are.