How To Read Bike Tire Tube Size?

How do I know my bike tube size?

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.

Is a bike tube the same size as the tire?

The tube should match the tire size diameter closely. However, tires that are close in bead diameter may use the same inner tube. For example, an inner tube for an ISO 630 tire (27-inch) will also fit an ISO 622 (700c) tire.

How much does a bike inner tube cost?

The average price of a bike tube costs between $5 and $9. You can find tubes for as little as $2 and up and even some models beyond the $35. Specialized tubes and puncture-resistant tubes will cost more than traditional bike tubes.

Can I use a smaller tube in my bike tire?

Bike inner tubes will accommodate a limited range of sizes. Larger tubes may be more susceptible to getting pinched between the tire and rim. It’s always best to try and match as close as you can, but there is some flexibility. Having a slightly smaller or larger tube will be quite fine.

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Do bike tire tubes have to be exact?

Since tubes are flexible and stretchy, they’re typically sold in a range of widths. You just need to make sure the tire diameter for the tube is exact. While these are a few of the common tube widths you may see at stores and online retailers — like REI and Amazon — always go by what’s written on your bike.

Is 27.5 the same as 700C?

Just as a 700C wheel is the same diameter as a 29” (29er) wheel, 650B shares the exact same rim diameter as 27.5”. 27.5”/650B rims have a bead seat diameter of 584mm, and 29”/700C rims have a bead seat diameter of 622mm.

What size tube fits a 700x35c tire?

Here’s the quick answer: Pick a tube that says 700 x [Width range], where the width range includes 35. For example, a tube that says “700×35-42” would be perfect for your bike.

Can a bike tire go flat without a hole?

To answer the question directly, yes, if your tube is losing air that quickly, it needs repair. It is not a matter of simply being too old. There is likely a very small hole or a leak in the valve.

How often should bike tubes be replaced?

Expect the inner tubes to last 2-4 years if you ride casually and 1-2 years if you race or freestyle with the bike. You have to replace the tires often because the stunts have a massive impact on the tires and inner tubes.

Why do bike tires go flat when not in use?

When not in use, tires get deflated over time. This is mainly due to the permeability of the tube and the small size of air molecules. Slowly air molecules find there way through the tube and valve seal.

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Can I use smaller inner tubes?

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.

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

You’re wondering whether 26-inch wheels will fit on a 24-inch frame and fork that you already have. Condensed answer: Most 24-inch bikes are too small and narrow to accommodate a 26-inch wheel unless the model is specifically designed for multiple wheel sizes.

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