Electronics, Lighting, & Gadgets - bell computer and wheel size

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spock
10-31-08, 02:33 PM
I just got a cheap bell computer for 10 bucks and it has all the features that I need. One thing that I can't figure out is how to set up a proper wheel size. I have 700x32 tires and there are 4 digits that should somehow correspond to my wheel size.

Here is the quote from the manual:

"the wheel value the distance in millimeters per one revolution of wheel"

table:

Road bike
20" 1586
22" 1759
24" 1916
26" 2073
27/700c 2124

I am guessing the last one represents the closest to my tire and the last 2 digits go to 29 and then it resets at 20. The third digit resets after 9 as well as second and the first one resets after 4.

It might be straight forward but I am not really getting it.The manual doesn't really cut it for me. I have ridden at 2129 and it seems somewhat accurate but I just don't know what those numbers represent. If anyone could point me in the right direction, I'd buy an imaginary best beer ever or maybe a couple. thanks

10 Wheels
10-31-08, 02:40 PM
Look on the tire.
Some of them have the computer setting on the side wall.
10 Wheels
10-31-08, 02:43 PM
2155 is what my Manuel says.

spock
10-31-08, 02:58 PM
There is nothing on the tire except 32 x 622, the size (700x32c), and PSI info.

In my manual there is not much except what I have specified in the original post and what to do with buttons to alter and memorize the numbers and a direction to the table. I just wish I knew what those numbers represent.
10 Wheels
10-31-08, 03:01 PM
There is nothing on the tire except 32 x 622, the size (700x32c), and PSI info.

In my manual there is not much except what I have specified in the original post and what to do with buttons to alter and memorize the numbers and a direction to the table. I just wish I knew what those numbers represent.

2155 millimeters
spock
10-31-08, 03:24 PM
Wow, that was my first instinct, the size of the whole tire as if it were stretched from one end to the other or the diameter. Then I had to go on my thinking trip which made me think that those 2 sets of numbers were separate entities. Thank you so much 10 wheels, I just measured the wheel and it is that simple.
10 Wheels
10-31-08, 03:29 PM
Wow, that was my first instinct, the size of the whole tire as if it were stretched from one end to the other or the diameter. Then I had to go on my thinking trip which made me think that those 2 sets of numbers were separate entities. Thank you so much 10 wheels, I just measured the wheel and it is that simple.

You are welcome.
I rode 500.3 miles last week, on my 2107 mm tires.
How many revolutions would that be?
spock
10-31-08, 03:54 PM
You are welcome.
I rode 500.3 miles last week, on my 2107 mm tires.
How many revolutions would that be?



382,133.271570954 if I'm not mistaken.

I multiplied how many millimeters are in one mile by 500.3 and then divided it by 2107.
10 Wheels
10-31-08, 03:56 PM
382,133 revolutions.
spock
10-31-08, 05:10 PM
Yessssss. My IQ has just bounced back from an uncanny fumble.
cmboyett
11-24-08, 10:13 AM
How does the bell wireless work for you. I put one on my lightening recumbant, 16" front tire. i calibrated it by measuring distance traveled on tire as they didnt give anything in the directions, It sill didnt give a correct reading,, it took me about a month of daily riding to calibrate it correctly. Soon after that the battery went dead, i put in a new battery and it helped,, but seems bell built in a govenor on that thing,, above 10mph it just goes berserk,, down to 0 and then bounces all around,, untill i get below 10mph again.. Oh well,, guess u get what you pay for,, a lesson learned for me..