How do I read my inner tube size?

Asked by: Christie Brown

The first number is the diameter of your wheel. Sizes such as 26, 24, 20, 27.5, 29 and 700c are common tire diameters. The second number (after the X) is the width of your tire. The range for widths is usually between 1 and 3 inches.

How do I know what size my inner tube is?

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.

What do inner tube size numbers mean?

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 big is an 18 inch inner tube?

Bell Standard Schrader Replacement Bicycle Inner Tube, 18″ x 1.75-2.25″

What does 700x28c mean?

700x28c simply means the size of your bicycle tire, according to what’s known as the ‘French system’. “700” is the overall diameter of the bike tire, measured in millimeters. The “c” is part of the old French system that classified widths of tires from “a” (being the narrowest) to “d” (which was the widest).

What does 4.00 mean on a tire?

4″ = refers to the diameter of the rim, in inches

For example, a 4.80/4.00-8″ tire typically has a 15.5″ diameter rather than the 16″ diameter you would expect.

What does 700X23c mean?

As I mentioned, 700X23c means a bicycle tire or wheel has a nominal diameter of 700m and a width of 23mm. I’ve used the word nominal because a 700c tire has a deflated diameter of 668mm. Note that all road bikes and cyclocross two-wheels come with 700c wheels, which are mostly 29 inches.

What does 700×23 28c mean?

“700” is the overall diameter of the bike tire, measured in millimeters. “28” is the width of the tire, again in millimeters and “c” refers to the width code of the tire (like you’d see when you look at your bike either from behind or in front).

IS 700c and 28 the same?

28”/700C/29er

The tyres can differ, but the 28”, 700C and 29er are all the exact same rim diameter. The 700 markings will be followed by the width in mm, and the 28 or 29 markings will be followed by the width in inches. This is the most common wheel size, so look out for familiar markings (such as 28×1.

What does 700×20 28c mean?

For example, 700×20/28c means that the tube can be used with 700cc tires range from 20cc to 28cc wide. I can answer the first part of your question. The second set of number is the width of the tires. For example, 700×20/28c means that the tube can be used with 700c tires range from 20c to 28c wide.

Is 622 same as 700c?

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

Will 700x28C fit 700x23C?

A: 700x23C & 700x28C are the same tire sizes (diameter). The 23 & 28 denote different tire widths, not tire diameter. Both of these will fit the same diameter rim (700). However the 23c usually is installed on 1… see more.

What is the difference between 700×25 and 700x25c?

All those tire sizes you list are the same. If there were different prices for the “700×25” and the “700x25c”, it’s because there was some other difference between the tires, like model, threads per inch, bead type (wire or kevlar), etc… The other widths were designated 700a, 700b, 700c… you get the picture.

What does 700×23 25c mean?

Some manufacturers (e.g., Specialize) offer two width measurements (e.g., 700×23/25c) to indicate that the carcass is 25 mm wide, but that the tread patch is equivalent to a 23 mm tire.

What does 700x40c mean?

700x40c is the measurement of your bicycle tire and is sized according to what used to be known as the ‘French system’. ‘700’ is the nominal diameter of your tire, measured in millimeters. ‘x’ just means multiplied by. ’40’ is the second number and is the nominal tire width, also measure in millimeters.

Will a 700×23 fit an 700×25?

Both sizes will work on the same rims.

What’s the difference between 700x23c and 700x25c?

There is very little difference between most 700×23 and 700×25 tires. Some manfacturers tires tend to run a little small in some models (my latest continentai 23’s are actually more like 20’s) If your bike came with 23’s you can run 25’s with no worries. and vice-versa.

Can you use a 23mm inner tube in a 25mm tyre?

No problem at all.

Can I put 23c Tyres on an 25c rim?

Should a 25c tyre fit where I previously had a 23c tyre? If you mean should it fit on the same rim then the answer is yes, it should.

Will 700x25c tube fit 700x23c?

They’ll be fine – I’d certainly use them without question in a 23mm tyre. Most tubes cover a range like 18-25 and 25-38.

What does 700x25c mean?

700x25c indicates a tire with a 700mm outer diameter and a 25mm width. A third type of tire size might appear on either a mountain or a road tire: 25-622 is the International Standardization Organization (ISO) way of identifying the 700x25c tire in the example above.