Cateye Tire Size Chart:  Measurements 

CatEye, a top technological pioneer, invented the first flashing bicycle light. One of the first cycle computers included a heart rate monitor,  altimeter, and cadence counter. Bike tires come in various sizes, depending on the bike and the terrain you’re riding on. When buying Cateye tires flashing lights, you’ll need to use the CatEye tire size chart to know which suits your bicycle. 

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cateye tire size

Cateye Tire Size Chart:  Measurements 

Initially, there were a variety of measurement techniques, with each nation that produced bicycles having its marking system. The exact size of the bike tire might be found with different numerals in various countries. A uniform method was required as cycling became increasingly worldwide.

Traditional size schemes use the inflated tire’s outer diameter (measured in inches or millimeters). However, the ISO standard notation uses the diameter of the wheel bead seat in millimeters, followed by the inflated tire width in millimeters. 

Although these size identifications can be mathematically equal, they can also refer to different size tires that are not interchangeable. Inch-based labels show the width in a decimal (26 1.75) or as a fraction (26 1 34), and although these size identifications can be mathematically equal, they can also refer to different size tires that are not interchangeable. (28 1 12 and 28 1.50 are not the exact sizes.) 

Cateye Tire Size Chart: Circumference Reference

Use the chart below as reference for tire circumference. 

Please note that the tire size is indicated on the side, most of the times. This chart is thus for reference purposes as the real tire size can always change due to factors such as tire pressure. 

ETRTOTire SizeCircum-
ference (mm)
Circum-
ference (cm)
Inches
47-20312×1.7593594 
54-20312×1.959409412
40-25414×1.50102010214
47-25414×1.751055110 
40-30516×1.501185119 
47-30516×1.75119512016
54-30516×2.001245125 
28-34916×1-1/81290129 
37-34916×1-3/81300130 
32-36917×1-1/4(369)1340134 
40-35518×1.501340134 
47-35518×1.75135013518
32-40620×1.251450145 
35-40620×1.351460146 
40-40620×1.501490149 
47-40620X1.751515152 
50-40620×1.951565157 
28-45120×1-1/81545155 
37-45120×1-3/8161516220
37-50122×1-3/8177017722
40-50122×1-1/21785179 
47-50724×1.75189018924
50-50724×2.001925193 
54-50724×2.1251965197 
25-52024×1(520)1753175 
 24×3/4 Tubular1785179 
28-54024×1-1/81795180 
32-54024×1-1/41905191 
25-55926×1(559)1913191 
32-55926×1.251950195 
37-55926×1.402005201 
40-55926×1.502010201 
47-55926×1.752023202 
50-55926×1.952050205 
54-55926×2.102068207 
ETRTOTire SizeCircum-
ference (mm)
Circum-
ference (cm)
Inches
57-55926×2.1252070207 
58-55926×2.352083208 
75-55926×3.002170217 
28-59026×1-1/81970197 
37-59026×1-3/82068207 
37-58426×1-1/2210021026
 650C Tubular 26×7/81920192 
20-571650x20C1938194 
23-571650x23C1944194 
25-571650x25C 26×1(571)1952195 
40-590650x38A2125213 
40-584650x38B2105211 
25-63027×1(630)2145215 
28-63027×1-1/8215521627
32-63027×1-1/42161216 
37-63027×1-3/82169217 
18-622700x18C2070207 
19-622700x19C2080208 
20-622700x20C2086209 
23-622700x23C2096210 
25-622700x25C2105211 
28-622700x28C2136214 
30-622700x30C2146215 
32-622700x32C2155216 
 700C Tubular2130213700c
35-622700x35C2168217 
38-622700x38C2180218 
40-622700x40C2200220 
42-622700x42C2224222 
44-622700x44C2235224 
45-622700x45C2242224 
47-622700x47C2268227 
54-62229×2.12288229 
60-62229×2.32326233 

Check out this complete circumference reference. Source: cateyeatlas.com

You can measure the tire circumference of your bicycle tire by using the following methods;

Rollout Test

A common method used in determining your wheel size that does not require any mathematics is to measure the distance you go in one revolution of the tire while inflating the pressure you regularly use. Here are two ideas on how to go about it:

Wall roll

  • Sit near a wall on your bike.
  • Roll ahead till your valve stem reaches the wheel’s bottom.
  • Make a chalk tape mark on that place with a friend.
  • Return the valve stem to the bottom of the wheel by rolling the wheel forward one revolution.
  • Make a chalk tape mark at that location.
  • In mm, calculate the distance between the two markings.

Water or paint roll

  • On the pavement, splatter a glob of wet paint or water.
  • Continue to ride over it.
  • Your tire should leave a mark on the pavement every time it touches it.
  • You should be able to tell how far apart the marks are (or between multiple spots for even greater accuracy).
  • Measure the distance in millimeters.

Using the calculator option to find size

These days you will find a calculator where you just choose a wheel and tire size from a table or type the mm in the  Dia (mm)” boxes to use the calculator. The calculator returns the expected circumference in millimeters (as used by most modern cycle computers), centimeters (as used by older cycle computers), and inches (as used by older cycle computers (used by some cycle computers). 

The tire size calculators above are based on standards such as the ISO/ETRTO (European Tire and Rim Technical Organization) tire size specifications, which define tire size as a tire width and rim circumference in millimeters. If your wheel size isn’t shown in the drop-down menu, just type it in the Dia (mm) area. 

Buying Guide & Tips

Bike safety is especially critical during the darker months and on evening rides.When buying the lights accessories, always pay attention to the  basic but crucial features.

The attention of road users whether motorists or bikers is always expected to be paramount as much as you might be having a nice road bike. Be sure to follow road signs and set a good example to other road riding enthusiasts. If you are driving at night then please ensure that the bicycle head lamp is well positioned to allow you se clearly. Brightest modes are better used when the road is not very congested so as to avoid disturbing other road users. Otherwise the light modes are always best.

Light options

Some of the light options you can consider include dynamo lights, steady light, white light, rear lights (-rear light), -exposure lights, wide beam, LED lights, peripheral light, back-up bike lights, 250-lumen rear bike light, basic commuter lights. With reference to Cateye, you can look at Cateye Rapid, Cateye sync, Cateye HL-EL135, Cateye Volt 200 XC. Some f the factors to consider when it comes to beams include beam pattern, beam shots, beam strength, beam shapes, head unit, spread of light. If you want the brightest beam with brightest lights, then be sure to check the beam test comparison data and ensure it is a compliant beam.

Batteries

As you know batteries play a critical role and luckily many makes these days come with built-in rechargeable batteries, which makes battery life inexpensive and saves you the trouble of having to keep checking the battery status. But don’t forget to check the battery compartment from time to time just to ensure that everything is okay.  The automatic power saving mode comes in handy, please check its existence.

Rear bike light

With a CatEye Rear Bike Light, you can stay safe while riding your bike. It has a constant mode with a battery life of up to three hours, flashing mode has a battery life of 30 hours, the fast mode has a battery life of five hours, and pulse mode has a battery life of 20 hours. Also, you can buy and fit a CatEye Cycle Computer for your bike to stay on top of your workout routine. The innovative technology allows you to keep track of your speed; mileage traveled, time, and more. 

The CatEye Strada Wireless Cycle Computer has a giant screen in its class and a ClickTecTM interface that allows you to swap between functions. With the CatEye Strada Wireless Cycle Computer, you can keep track of your maximum speed, current speed, average speed, trip distance, odometer, elapsed time, and trip distance. 

Special offers

You can always do some good timing and take advantage of special offers on road bike items.  If you are going to buy as a business, then you might want to loo at business-only prices based on select model categories, corresponding price range and other factors such as automatic transmission option.

Conclusion

When buying the CatEye flashing lights, it is advisable to efficiently use the size chart to determine the tire sizes  If you have any questions, please post them at the end of the article.

The Cateye experience is a unique one given the rich history behind the products and previous models. You want to get the best accessible option possible and smile all the way as you enjoy your rides.

Bike Size Chart, Tires Size Chart, Topics

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