# Frequent question: How are motorcycle wheel sizes measured?

Contents

The first number (180) is the width of the tire in millimeters. The second number (70) is the aspect ratio, which is the height of the sidewall. … The third number (16) is the rim size. In this case, the rim size is 16 Inches in diameter.

## How do I know my motorcycle wheel size?

How to Measure a Motorcycle Rim

1. Remove the tire from the rim.
2. Lay the rim on a flat surface.
3. Measure the diameter of the rim. Do this by measuring the distance between the widest point of the rim. Measure from the bed where the tire will sit. …
4. Measure the width of the rim. Do this by measuring the distance from one side of the tire bed to the other.

## How are wheel sizes measured?

The diameter of the wheel is the diameter of the cylindrical surface on which the tire bead rides. The width is the inside distance between the bead seat faces. The offset is the distance from the wheel’s true centerline (half the width) to the wheel’s mounting surface.

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## What size are motorcycle wheels?

There are two types: 8 mm and 10 mm. The larger one, which actually fits an 11.3 mm hole in the wheel, is by far the most common size.

## Are wider motorcycle tires better?

Having a wide rear tire helps to prevent slippage in wet, rainy conditions. Wide tires provide a smoother ride. They are more capable of absorbing the bumps on the road. Wider tires are great because they provide help with power transfer and help handle stronger motorcycle engines.

## How wide is a 180 motorcycle tire?

TIRE SIZE CONSIDERATIONS

So, because there’s an allowable tolerance on the nominal width, a 180 labeled tire can measure 170 mm or 190 mm.

## How do I measure my wheel width?

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. Measure the farthest distance between the bolt holes to determine the bolt pattern.

## How do you measure a wheel diameter?

Wheel Diameter

When measuring for the Actual Diameter, you will want to measure from the inside of the Barrel of the wheel (Shown by the Red Line in the above photo). Example: A wheel with an actual Diameter of 18” will have an overall diameter of around 19.5”.

## How do you read wheel 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.

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## Why are front wheels smaller?

Also, because a tractor is usually pulling things, the heavy weight behind it pushes the rear wheels down, increasing their grip by providing more contact and less slippage. The two smaller wheels at the front have a much better steering radius which means it’s easier to turn sharp corners.

## Why do motorcycles have different size wheels?

In general motorcycles intended for dual purpose or off road use have larger front wheels. … Motorcycles have wider wheels/tires in the rear because that’s where the power is put down, and more weight is carried there. Street bikes fronts are usually the same diameter as the rear (17″ rim), but smaller across.

## Can I put bigger tires on my motorcycle?

When considering wider tires, you must factor in clearance for width and diameter, the effect on stability and handling, along with whether your rim is wide enough. If wider tires are approved for a motorcycle, it is usually permissible to increase by only one size designation.

## Are fat bikes harder to ride?

Fat bikes may be known for floating over tricky surfaces, but don’t be fooled: they’re much heavier than mountain bikes, which are heavier than standard road bikes. The increased weight makes fat bikes harder to pedal on normal terrain, like asphalt and pavement.

## Can I put a bigger tire on my rim?

As a general rule of thumb, it’s safe to fit a tire up to 20 millimeters wider than stock on the original rim. The actual width of the tire will vary depending on the width of the rim: The tire will expand 5 millimeters for every half inch (12.5 millimeters) increase in rim width.

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## How wide is a 240 motorcycle tire?

The tire has a section width of 8.23″ (209mm) when mounted on a 6.0″ wide wheel.