# Frequent question: What does 700x38c mean on a bike tire?

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700x38c is the size of your bicycle tire. 700 is the nominal diameter of the tire in millimeters. 38 is the width of the tire (as seen if you were looking at your bike from the front/back). C refers to the old French system of classifying wheels according to their Bead Seat Diameter.

## What size bike tire is 700x38c?

What Size Is 700x38c? A 700x38c tire is a bicycle tire with a nominal diameter of 700mm (roughly 27.5 inches) and a width of 38mm (approximately 1.5 inches).

## Is 700x38c same as 700×38?

In basic terms, a 700x38c tire is approximately 27 1/2 inches by 1 1/2 inches (or 1.50 inches). … Well, if the bike tires that you have on your bicycle currently say that they’re “700x38c” then only ever swap them for tires that are the exact same size i.e. “700x38c”.

## What does C mean in bike tire size?

The letter “C” indicates that the rim is the crochet type – the most common rim these days. (Note that those parameters describe the rim rather than the tire.) Therefore, if the letter “C” in rim descriptions signifies the rim type, it may indicate the same in a tire listing (e.g., 700x25c).

## What size is 40 622 700 38C?

Table of bicycle tires sizes

ETRTO English Size FRENCH SIZE
47-622 28 x 1,75 700 x 47C
40-622 28 x 1-5/8 x 1-3/4 700 x 40C
38-622 28 x 1-5/8 x 1½ 700 x 38C
37-622 28 x 1-5/8 x 1-3/8 700 x 35C

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

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.

## 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).

## How wide is a 38c TYRE?

“The 38c (40mm) width is by far the most popular now, but things keep getting wider,” said Nathan Forbes, Schwalbe brand manager.

## How do you read bike tire sizes?

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.

## What size wheel is 700c?

700C is used to refer to any tire, rim, or wheel with a 622mm BSD, but it could be on a skinny-tired road bike where the wheel has an actual diameter of only 660mm (which is actually a little LESS than 26 inches!), or a mountain bike with a wheel diameter of over 29 inches.

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## Is a 28 inch wheel the same as 700c?

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.

## Is a 700c wheel 29 inches?

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.

## Is 622 the 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). … While the diameter for both 29″ and 700c wheels is the same at 622mm, rims made for mountain bikes are generally wider to accommodate wider tires.

## 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 tire is 700x45c?

The second measurement type (700x45c) is a 45 mm wide tire that also fits on a rim with a 622 mm bead seat diameter, the 700c is an old French sizing nomenclature based on the final external diameter being 700 mm for width class of tire (e.g., a, b, c widths).

## What PSI should 700C tires be?

Tire inflation basics

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A typical road tire should be inflated to something between 90 and 120 PSI.