# What size are mountain bike tubes?

Contents

## How do I know my bike tube size?

The size is almost always written somewhere on the sidewall of the tyre. Inner tubes typically state a wheel diameter and width range for which they will work, e.g. 26 x 1.95-2.125″, indicating that the tube is intended to fit a 26 inch tyre with a width of between 1.95 inches and 2.125 inches.

## How do I choose a tube for my mountain bike?

MTB tubes must be the correct width as well – also measured in inches. This is to allow the tube to expand to the correct size for your tires, and can range from as narrow as an inch right up to a tire width of 2.5″ or greater. If you had a 26 x 2.3″ tire, you would need a 26″ tube that can expand to a width of 2.3″.

## Can a 26 inch inner tube fit a 27.5 wheel?

26″ tubes work perfectly well with 27.5″ wheels.

## Will a 27.5 tube fit a 29 wheel?

They will both fit into 29, but at a stretch, literally. I’d not use it as a permanent fix, but as an emergency get you home with no alternatives, you’d probably be ok.

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## What size inner tube do I need for 700x40c?

Since the size of an inner tube can vary depending on the amount of air that you fill it up with, they are sold by a range of sizes that they will definitely fit. So if you have bike tires that are 700 x 40C, you need to get inner tubes which come with a size range of 700 x 35 c to 70 x 43c.

## Will a 1.75 tube fit a 1.5 tire?

#1. All tires of 26″ will fit on a 26″ rim. The diameter 1.5″, 1.75″,1.95″ etcetera have tubes which will fall into the range, ie, tire = 26″ x 1.75″ so you can use a tube in the range of 1.5″ – 1.75″. … Match the tube to the tire size.

## What size inner tube do I need for 27.5 wheel?

Inner tube size examples for road and mountain bikes

Mountain Bike Inner Tube Sizes
Wheel Size Tyre Width (inches) Inner Tube Size (inches)
27.5” or 650b 2.3” 650b x 1.75 – 2.4 or 27.5 x 1.75 – 2.4
27.5”+ or 650b+ 2.8” 650b x 2.3 – 3.0
29” 2.4” 29 x 1.75 – 2.5

## Can you put a 26-inch tube in a 24 inch tire?

Divide at least 5-8mm from each measurement to ensure that the wheels won’t rub. … If the size of the wheels exceeds the findings, you won’t be able to install your current 26-inch wheels. The only option left would be to use a narrower tire such as 1″ (the smaller the tire, the smaller the wheel) and try again.

## Does inner tube width matter?

No, tubes and tires don’t need to match exactly. Tubes are made from butyl rubber which can stretch. Bike inner tubes will accommodate a limited range of sizes. Larger tubes may be more susceptible to getting pinched between the tire and rim.

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## Can I use a smaller inner tube?

Can I use a smaller or bigger inner tube than the tire? An inner tube that is 10 millimeters or half an inch wider or narrower can be used as long as it matches the rim diameter. A 700×25 inner tube works in a 700X32 tire, but in a 700X45 could experience issues.