Jul 18, 2001 8:07 AM
|My last bike as a 12 speeder. My new one has 3 chain rings and 24 speeds.
What I'd like to do (just for shits and giggles) is to make a little diagram on what gears to use - smallest to largest.
Is there an easy mathematical way to do this. I think there is but I'm having brain cramps at the moment
|re: gearing answer||Spoke Wrench|
Jul 18, 2001 8:22 AM
|gear inches = chainring teeth divided by cassette teeth X 27.
Work out that equation for every gear combination and you can plot your gear ratios in sequence.
|Phun w/#s||grzy mnky|
Jul 18, 2001 8:28 AM
|Make up a little matrix - put the front combos on one side of a box and put the rear combos on an adjacent side. Now fill in the combos. |
Bonus knerd points - print it out on your PC and tape to your stem for quick reference! Impress your buds....
|better idea for nerd points.||Grinder|
Jul 18, 2001 9:09 AM
|enter it onto a palm pilot that's attached to your stem.|
|Another idea for nerd points.||jagiger|
Jul 19, 2001 5:21 AM
|...tape the list to your helmet and wear big thick black rimed
glasses (ala Buddy Holly, Elvis Costello, et al).....
|Or, go to Sheldon Browns site||Mel Erickson|
Jul 18, 2001 8:34 AM
|and use his gear ratio calculator.
|re: gearing question!||Len J|
Jul 18, 2001 8:41 AM
|Try this site:
select the gearing table yu want & then answer the questions, recalculate & I think you will have what you need.
|front divided by rear times wheel diameter||club|
Jul 19, 2001 5:18 AM
|like 52/13 times 27 = 108
then multiply by Pi for travel per pedal revolution
a little chart on the stem might look geeky but it is a great way to memorize your gears. I can still recite the gear-inches of my 12-sp. straight block race bike, 20 years later.
|what are gears?||dale c|
Jul 19, 2001 5:35 AM
|I am new to biking, and I sometimes wish it were easier to peddle, especially when goin uphill. Do some bikes have different gears? I am riding a new Trek 1000. Thanks for any help.|
|yeah i made a table||bike_rider81|
Jul 19, 2001 6:39 AM
|i have been soo bored at work that i made a table i excel. it is something to play around with and since you have excel on your screen it lookes like you are actually doing something. i found out something interesting: the triple setup(52/42/30 11-32) that a coworker uses has a bigger gear range in its big ring than i have altogether(52/39 11-23). and i see triples set up like that all the time at my shop. but i shouldn't talk too much b/c i have yet to take a road bike into the mountains. but i just bought a 5900 and am dieing to do so. i think i will be hurting pretty bad, but i am young|| |