You can find the tire circumference (L) of your tire size in the chart below, or actually measure the tire circumference (L) of your bicycle. Tire size. L (mm) Tire size. I have a Cateye Micro Wireless computer that I want to put on my 29er, Does anyone have a tire size chart that lists 29ers, or does anyone. To use the calculator below, select a wheel and tire size from the table or enter the wheel and tire size in mm in the “Dia. (mm)” boxes. It will automatically.

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Press the MENU button to complete setting. When it is not displayed, check the installation conditions and again page 2.

With the tires under proper pressure, place the valve stem at the bottom. So I entered that in the Cateye Micro Wireless and rode the bike to test if the code was correct.

Berkshire Sports – Bike Computer Tire Size Calculator

Pressing and holding the MODE button switches. Do let me know the real wheel circumference when you know.


My only reference for using was Sheldon Brown’s chart. Just measured a fairly new Schwalbe Marathon at mm. Hi there I’ve measured the circumference by wrapping inch-tape around the wheel and I got mm measured 3 times, with the tape pretty tight Select the speed unit.

Setting up the computer, Appendix, Tire circumference – CatEye CC-PA100W [Padrone] User Manual

That’s close to what you can find in here: I gots to know man. Hi Kris, I bought a cateye wireless strada recently for my bike as well, and I stumbled onto your website while looking for the answer to the same question that you asked since the manual did not have a computation for the Brompton’s tyre configurations.

Kris Ablan February 20, at 9: You can find the tire circumference L of your tire size in the chart be. Mark where the valve stem. Fortunately, there’s the internet. It was useful because I knew how fast I was going, my pace, and the time and distance I covered.

Csteye biked to a place which I knew was 1 kilometer from my house, catwye when I got there the reading was 1 kilometer.

With the tires under proper pressure. Current speed Cadence Preparing the computer Perform the following formatting operation, when you use the unit for the first time or restore the unit to the condition before shipment. Just measured a new Schwalbe Marathon at 75psi one circumference along the ground and I get When it is not displayed, check the installation conditions.


Didn’t take note of the tire pressure but tire give was minimal.

You may be correct that the Brompton’s wheel circumference could be smaller than I’ve forgotten to say that I have Schwalbe Marathon tires. However, since using the code, the reading has been quite accurate. Unknown June 25, at 7: Let me know thoughts.

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Complain wrong Brand wrong Model non readable. Unknown July 6, at Kris Ablan May 13, at 9: Unknown August 18, at 8: A problem came up, though, in inputing the wheel circumference [L mm ] unto the computer.

After installed, check that the speed is displayed when gently turning.