# Question: What do the numbers on my bike tire mean?

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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. … For example, a 26 x 1.75 size means the tire diameter is 26 inches and the tire width is 1.75 inches.

## 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.

## What does 700c mean for bike tires?

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.

## What does 60 TPI mean on a bike tire?

The quality of the cord casing is indicated by the TPI (threads per inch) or EPI (ends per inch). Generally, the higher the threads per inch (TPI) the higher the quality of the tire. In the Kenda line of tires, entry level tires have 22tpi and they rise to 30, 60, and 120tpi at the premium level.

## Is 28 inch the same as 700c?

28”/700C/29er

The wheel sizes 28”, 700C and 29er or 29” all refer to the same rim size: ETRTO 622. 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 700c same as 622?

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.

## What is a 650b bike?

A 650b wheel is one that’s about 27.5 inches in diameter, when measured from tyre edge to tyre edge. This compares to 26in for a standard mountain bike wheel and 29in for so-called ’29er’ wheels (700c road wheels are also 29in in diameter).

## What size bike tire is 40 622?

Table of bicycle tires sizes

ETRTO English Size FRENCH SIZE
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
32-622 28 x 1-5/8 x 1-1/4 700 x 32C 700C Course

## What is a 42c tire?

The c number, as in 42c is a marketing number, so it tells you what the manufacturer thinks you want to hear, which is probably going to be fairly accurate when interpreted as millimeters. Tires also have ISO numbers, and sometimes a tire will even list two widths, i.e. for the casing and the tread.

## Are 29 inch wheels the same as 700c?

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.

## What does 35c tire mean?

35c means that the tire is roughly 35mm wide.

## What’s the difference between 700c and 29er wheels?

No! 700c is not a size for wheel nor tires. 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 higher or lower TPI better?

Lower-end tires have lower counts which tend to make them heavier and provide a harsher ride. Higher-end tires have higher thread counts which allow them to ride smoother and contour to bumps on the road better. … It is important to note that a higher TPI tire is not more prone to flats than a lower TPI tire.

## What is the difference between 60 TPI and 120 TPI?

The higher 120 TPI casing is lighter, thinner and will be able to better conform to the shape of the terrain. However, the 60 TPI casing is more resistant to puncture, abrasions and cuts.

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## What does 60tpi mean?

The TPI designation stands for threads per inch and represents the number of threads per inch of tire casing. Hence, a 60 TPI has greater durability but is heavier than a 120 TPI-designated tire.