smellygary
07-12-06, 07:18 PM
I can't seem to remember the formula to determine gear inches. Can somebody remind me? Thanks.
Bicycle Mechanics - Gear/inch formula
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Moochers_Dad
07-12-06, 08:19 PM
you'll need a slide rule. it's crank teeth divided by cog teeth, multiplied times wheel diameter.
it's easier to go here:
http://www.sheldonbrown.com/gears
it's easier to go here:
http://www.sheldonbrown.com/gears
Moose
07-12-06, 09:07 PM
crank teeth divided by cog teeth multiplied times wheel diameter.
52/11x27=127.64 gear inches
52/11x27=127.64 gear inches
smellygary
07-12-06, 10:11 PM
crank teeth divided by cog teeth multiplied times wheel diameter.
52/11x27=127.64 gear inches
Cool, thanks!
52/11x27=127.64 gear inches
Cool, thanks!
Identity Crisis
07-15-06, 11:37 AM
I refer to Sheldon's site a lot for gear inches and everything else bicycling. My LBS mechanic pointed me out to this site a few weeks ago, a pretty slick interface, a lil more info too...
http://www.jbarrm.com/cycal/cycal.html
http://www.jbarrm.com/cycal/cycal.html
CdCf
07-15-06, 12:38 PM
However, if you want true gear inches, you'd better use the actual wheel diameter. A 700C wheel with narrow tyres is typically 26" in diameter. My 26" wheels with narrow slicks are a mere 24.5".
HillRider
07-15-06, 03:14 PM
I believe you asked this exact question a few days ago and it led to an absurdly long thread for something so simple. Next time try the search function.
Moose
07-16-06, 07:36 AM
I believe you asked this exact question a few days ago and it led to an absurdly long thread for something so simple. Next time try the search function.
Don't be an arse. Here is the thread your refering to:
http://www.bikeforums.net/showthread.php?t=210401&highlight=gear%2Finch
Check the dates of the OP. On the Board it did show smelly as the thread starter but somehow Retro's reply started a new thread with the same title. It was a glitch.
You are very salty.
Don't be an arse. Here is the thread your refering to:
http://www.bikeforums.net/showthread.php?t=210401&highlight=gear%2Finch
Check the dates of the OP. On the Board it did show smelly as the thread starter but somehow Retro's reply started a new thread with the same title. It was a glitch.
You are very salty.
HillRider
07-16-06, 07:38 AM
Don't be an arse.
Check the dates of the OP. On the Board it did show smelly as the thread starter but somehow Retro's reply started a new thread with the same title. It was a glitch.
Not trying to be. The forum does get the exact same question from the exact same OP on occasion and this appeared to be one of those times.
Check the dates of the OP. On the Board it did show smelly as the thread starter but somehow Retro's reply started a new thread with the same title. It was a glitch.
Not trying to be. The forum does get the exact same question from the exact same OP on occasion and this appeared to be one of those times.
smellygary
07-16-06, 08:10 AM
I'm sorry. I didn't mean to itch my glitch in public!
Moose
07-16-06, 08:19 AM
As for the gear/inch topic being beat into submission in the imposter thread, I am with HillRider. Don't get too caught up in the numbers, just ride.