Bike Tire Size report

City-Bike TiresAs the public's awareness of environmental protection continues to increase, green cycling has been sought after and loved by more and more people. The most crucial step is to choose a bike that suits you first. Faced with different riding styles, you need to learn about various bicycles, such as mountain bikes, children's bikes, and cross-country bikes. Similarly, choosing the right tire is one of the essential skills you need. In addition to knowing what size tires are for your bike, there are some tips for measuring tires.

It is essential to avoid excessive tire wear. A flattened tire will increase the probability of a tire blowout during riding. Check the tire wear in time and replace the severely worn tire in time, effectively enhancing your riding experience.

A great set of tires can enhance the riding experience. Our guide covers the basics of bicycle tires, including size, structure, and how to know when to change tires. In this article, you will get a small guide on choosing the right tire size for your bike and how to measure bike tires.

What are bicycle tires?

A bicycle tire is a rubber ring with a tread fixed on the wheel. The tires are in contact with the ground and play a vital role in the riding process. For example, a tire that is too smooth for the terrain will not provide enough grip and traction. Conversely, a tire that is too smooth for the landscape will slow down the speed. Bikes can go almost anywhere, so there are many tires to choose from, covering nearly every type of riding condition you can think of, from freshly paved smooth and flat asphalt roads to muddy mountain bike trails.

Details About Bike-Tire-Size You Should Know

Bike Tire Size Chart

If you are facing and should change the tires on your bike, you must choose the correct bicycle tire sizes for your bike wheels. Each tire size is very variable depending on the type of bicycle tire you want and what kind of bike you have. While this is a non-exhaustive list of all the bike tires out there, we encourage you to use this as a general guide to quickly understanding bike tire sizing systems. Bike tires come in a variety of sizes. With time, the International Organization for Standardization has developed a universal approach to understand better and regulate tire and rim sizing.

Note that the "c" in the size chart does not stand for centimeters. It's a holdover from an old French system that designated tire sizes using the letters a, b and c.

The ISO system uses two numbers:

  • The first is the width of the tire or rim in millimeters. The actual width of the tire varies a little depends on the width of the rim. The rim width measures the distance between the edges of the rim).
  • The second ISO number is the diameter of the bottom of the rim, in millimeters.
ROAD BIKE TIRES
ISO(mm) Conventional Name Inches
622 Modern Road Bike 700c 29
584 Vintage Randonneur 650b 26x1 1/2, 27.5
571 High-Performance Time Trial 650c 26x1, 26x1 3/4
MOUNTAIN BIKE TIRES
ISO(mm) Conventional Name Inches
622 29 inch Mountain Bikes 700c 29
584 Modern MTBs 650b 26x1 1/2, 27.5
559 Classic Mountain Bikes 26x1.0 - 26x2.5
CITY BIKE TIRES
ISO(mm) Conventional Name Inches
622 Hybrid Bikes 700c 29
571 Older Schwinn Models 650c 26x1, 26x1 3/4
559 City Bikes 26x1.0 - 26x2.5
507 Cruisers 24x1.5 to 24x2.5
CHILDREN'S BIKE TIRES
ISO(mm) Conventional Name Inches
547 British and Schwinn Children's Bikes 24x1 1/8, 24x1 3/8 (S-5)
540 British Children's Bikes 600a 26x1 1/2, 27.5
520 Classic Mountain Bikes 26x1.0 - 26x2.5
507 Children's Mountain Bikes 24x1.5 to 24x2.5
451 Children's Lightweight Bikes 20x1 1/8, 20x1 1/4, 20x1 3/8
305 Children's Bikes 16x1.75 to 16x2.125
203 Children's Bikes 12 1/2 x anything
OTHER BIKE TIRES
ISO(mm) Conventional Name Inches
451 Some BMX Bikes 20x1 1/8, 20x1 1/4, 20x1 3/8
406 Some Recumbent Bikes 20x1.5 to 20x2.25
406 BMX Bikes 20x1.5 to 20x2.25
369 Folding bikes by Moulton 17x1 1/4
355 Folding bikes by Birdy 26x1, 26x1 3/4
349 Folding bikes by Moulton 16x1 3/8
305 Some Recumbent Bikes

16x1.75 to 16x2.125

ISO TIRE SIZES
ISO Conventional Size Application
635mm 28x1 1/2, 700B Commonly used in Asia and the Netherlands for utility bicycles.
630mm 27 x anything Older road bikes.
622mm 700C, 29inch Modern road bikes, hybrids, 29" mountain bikes.
599mm 26x1.25, 26x1.375 Old US lightweight bicycles.
597mm 26x1 1/4, 26x1 3/8 (S-6) Older British bikes, Schwinn lightweight bikes from the 60s and 70s.
590mm 26x1 3/8 (EA3), 650A 3-sp department store bikes, children's 10sp bikes, Italian high-performance bikes for smaller riders.
587mm 700D Unusual size once used on some GT bikes.
584mm 26x1 1/2, 650B, 27.5" Schwinn mountain bikes, the French utility, and touring bikes
571mm 26x1, 26x1 3/4, 650C Old Schwinn cruiser bikes. 650C size used for modern high-performance road bikes for smaller riders and triathlon bikes.
551mm 26x1.0 to 26x2.5 Many modern mountain bikes and cruisers.
547mm 24x1 1/8, 24x1 3/8 (S-5) British and Schwinn children's bikes.
540mm 24x1 1/8, 24x1 3/8 (E5), 600A Commonly used on wheelchairs. Also used on British children's bikes.
520mm 24x1, 24x1 1/8 Used for front wheel on some Terry bicycles.
507mm 24x1.5 to 24x2.5 Children's mountain bikes and cruisers.
490mm 550A European children's road bikes.
457mm 22x1.75 to 22x2.125 Children's bikes.
451mm 20x1 1/8, 20x1 1/4, 20x1 3/8 Some recumbent bikes, children's lightweight bikes, and some BMX bikes.
440mm 500A European children's bikes and folding bikes.
419mm 20x1 3/4 Schwinn children's bikes.
406mm 20x1.5 to 20x2.25 Most BMX bikes, some recumbents.
390mm 450A European children's bikes.
369mm 17x1 1/4 Alex Moulton bikes.
355mm 18x1.5 to 18x2.125 Used on Birdy folding bike made by Burley.
349mm 16x1 3/8 Original Moulton bikes from the '60s.
340mm 400A European children's bikes.
317mm 16x1 3/4 Schwinn children's bikes.
305mm 16x1.75 to 16x2.125 Some recumbents, children's bikes, trailers.
203mm 12 1/2 x anything Scooters, children's bikes.
152mm 10x2 Wheelchair tire.
The following bike tire size chart allows you to convert between ETRTO, English-, French-and German targets, and rim circumference. If you are unsure of your bicycle tire size, you can look into a bicycle tire table where you can easily find just the tires that fit your bike. Most of the tire size charts explained English, French and German targets and rim circumference in millimeters.
ETRTOENGLISH SIZEFRENCH SIZEGERMAN SIZERIM CIRCUMFERENCE (MM)
40-635
28 x 1½
700B standard
28 x 1½
1994
47-622
28 x 1,75
700C
28 x 1,75
1995
40-622
28 x 1-5/8 x 1-3/4
700B standard
28 x 1½ x 1,75
1995
38-622
28 x 1-5/8 x 1½
700 x 40C
28 x 1½ x 1,75
1995
37-622
28 x 1-5/8 x 1-3/8
700 x 38C
28 x 1-3/8 x 1-5/8
1995
32-622
28 x 1-5/8 x 1-3/8
700 x 35C
28 x 1-1/4 x 1-3/4
1995
28-622
28 x 1-5/8 x 1-1/8
700 x 32C
28 x 1-1/8 x 1-3/4
1995
25-622
28 x 1-5/8 x 1
700 x 38C
28 x 1 x 1-1/4
1995
23-622
-
700 x 25C
-1995
32-630
27 x 1-1/4
-27 x 1-1/4
1978
28-630
27 x 1-1/8
-27 x 1-1/8
1978
25-630
27 x 1
--1978
32-597
26 x 1-1/4--1876
37-590
26 x 1 3/8
650 x 35A
26 x 1 3/8
1854
25-571
26 x 1
-26 x 1
1854
32-590
26 x 1-3/8 x 1-1/4
650 x 35A
-1854
40-590
26 x 1-3/8 x 1½
--1854
40-584
26 x 1½
--1834
37-584
26 x 1½ x 1-3/8
--1834
47-559
26 x 2 x 1-3/4
-26 x 1,75 x 2
1755
32-541
26 x 2 x 1-3/4
650 x 35A
-1699
40-540
24 x 1-3/8 x 1½
--1695
37-540
24 x 1-3/8
-24 x 1-3/8
1695
40-534
24-1½
--1676

How to Get the Right Bike Tire Size

Buying new tires for your bicycle shouldn't be too complicated. Your tire size will be printed on the side of your current tire. If you need to check your new bicycle tires' tire size, it is essential to check what numbers are on the old tire – it is the correct tire size. They are usually on the side of your bicycle tires.As long as your new tire’s size matches one of these sets of numbers, the new tire should fit your bike. Numbers on Bike Tires

Signs For A New Bike Tire

Several signs show that it is a time to change a new bike tire:

  1. Your tread edges are noticeably worn down, and you can see a lot of flats.
  2. Your bike's handling has gotten noticeably worse.
  3. Your tire tread appears rounded or uneven.
  4. You notice a thread pattern (hashtags) on the sidewall of the tire.
  5. Rubber is beginning to crack or flake off of the knobs or sidewalls
  6. You notice a distortion in the tire caused by a damaged casing underneath the outer wall.

How to measure a bike tire

Bicycle tire measurements have two components. The larger number is the tire diameter in inches, and the smaller number is the tire width in inches. Although most tires have the measurements imprinted on the tire, the numbers can become worn and unreadable over time. You can find two setps of bike tire measurement below.

Step 1: stand up the bicycle with the kickstand, or lean it up against a sturdy wall.

Step 2: measuring diameter. Place a tape measure against the center of the bicycle wheel, and then extend the tape in a straight line towards the tire’s outer edge.

Step 3: measure the flat surface across the tire's tread from one side of the tire to the other. This is the tire width.

Step 4: Combine the measurements of tire diameter and width to obtain the tire size.

Choices In Tire Widths

The bike tire size is printed on the side of the tire. The next component of tire size is width. This is the second number in the tire measurement. We list several typical tire sizes below:

  1. Fat tires and tires work well on snow or sand and offer a relaxing, grippy ride wherever they go. Its width may reach 4".
  2. Cross-country bikes: 1.9" to 2.3" wide.
  3. Trail and all-mountain bikes: 2.3" to 2.5" wide.
  4. Downhill bikes: up to 2.5" wide.
  5. Road bike tires: Most road bikes have a 700mm outer diameter, with widths starting at 23mm. Most road tire widths are less than 30mm, but you can also find tires as wide as 45mm on bikes intended for gravel roads.
  6. Kids' bike tires: Typical diameters are 20" and 24", though you also see wheel sizes below 20" for tiny children's models, widths vary widely as well.
It is wise to repair and replace bicycle tires in time. If you have questions about tire options, please consult your bike shop. A good bike shop can answer your questions about bike tire sizes and provide good suggestions.

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