# How do I know what size inner tube I need for my bike?

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The best way to check what size inner tube you need is to look on the sidewall of your tyre. Tyre manufacturers print the size on the sidewalls, so look out for numbers such as ‘700x23c’ for a road bike, or ’26×1. 75′ which is for mountain bikes.

## What size inner tube do I need for 700x32c?

Just like balloons, the dimensions of inner tubes vary with the volume of air that you put into them. So you’ll find that tubes are labeled with the diameter and a width range, e.g. “700×28-32”. In that case, a tube with the size 700×28-35 would be great for tires from 700×28 right up to, and including, 700×35.

## What size inner tube do I need for 700x38c?

700x38c Inner Tube Conversion (Simple Answer)

The simple answer is: 700x38c converts to around 27.5” x 1.5”. The even simpler answer is to stick with the 700x38c sizing and buy a tube that’s labeled with that size.

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## What inner tube do I need for 700x35c?

The simple answer is that you need to: Pick an inner tube that says it is 26 x Width Range* *this ‘Width Range’ should include 1.95, for example, an inner tube that says it is “26 x 1.75-2.25”, would be the ideal tube for your bicycle wheel.

## Will a 29 inch tube fit a 700c?

So a 29 inch MTB tube will have the same diameter as a 700c road wheel, while a 27.5 inch tube will be the same diameter as a 650b road wheel.

## Is the inner tube the same size as the TYRE?

Inner tubes vary in size depending on the circumference of the wheel, and the width of the tyre: Wheel Diameter/Circumference: Depending on whether your bike is a road bike, touring bike, mountain bike, or child’s bike, the diameter and circumference of the wheel can vary.

## Can I use a smaller inner tube?

Yes, you can, as long as you don’t go more than one size smaller, or the differential is not too extreme. A 1.25 in a 1.5 is fine. A 1.25 in a 2.25 is likely to have issues with flats. Your LBS will have tubes.

## Will a 2.125 tire fit a 1.75 rim?

They should fit with no problems. When I was a kid, a lot of us into BMX all ran 20 x 1.75 rims, but the front tire would be a 2.125 and the rear was a 1.75.

## IS 700C the same as 29?

29″ (ISO size 622) is actually the same rim diameter as 700C, although most 29″ tires will not fit 700C road rims because they’re too wide. 29″ tires are popular with mountain bikers; search for 29″ MTB. … 700C (ISO size 622) is the most commonly used size for modern road bikes.

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## Which is better Presta or Schrader valve?

Presta valves are easier to pump than Schrader, because they have no valve spring to overcome. … In narrow rims, clincher tires also leave insufficient space between tire beads for larger Schrader valves. In contrast Schrader valves are more robust, universally used, and have an easily removable core.

## How do I know what inner tube to buy?

Checking the Inner Tube Size You Need

The best way to check what size inner tube you need is to look on the sidewall of your tyre. Tyre manufacturers print the size on the sidewalls, so look out for numbers such as ‘700x23c’ for a road bike, or ’26×1. 75′ which is for mountain bikes.

## How much does a bike inner tube cost?

​Inner tubes typically cost \$8. Specialty tubes (extra long valves, odd sizes, thorn proof, etc.) may cost more. Bikes with internally geared hubs or full chain cases cost more due to extra time, complexity, or component rarity.

## Can I use bigger inner tubes?

Yes, it’s perfectly safe to use the next larger size tube in a smaller tire. It’s a common trick used by bike messengers to reduce the chance of flats. The only downside is a slightly heavier wheel since you’re using more tube that you really need.

## Will a 27.5 tube fit a 29 wheel?

No, it’ll be fine. Have you played the innertube-pump-until-it-blows game? 26ers end up like tractor tyres before they let go. Always carry a presta-valved 27.5 tube with me as a spare, can be used for 26/27.5/29 wheels with presta/schrader size valve holes so covers all bases.

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## Can you use 28 inch tubes for 25 tires?

Yeah, just make sure it’s not pinched between the rim & tyre. Helps if you pump it up slightly first so it’s round rather than flat. No problem at all, the tube likely fits a range of tires anyway.

## What does 700c mean?

700c is the size of your bike tire, according to the ‘French system’. The “700” number is the stated diameter of the bicycle tire in millimeters. “c” is the width code of the tire (as you would see if you looked at your bike from behind or in front).