what if? two different crank arm lengths...
09-25-09 | 12:40 PM
#29
.
Joined: Aug 2005
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From: Rocket City, No'ala
Bikes: 2014 Trek Domane 5.2, 1985 Pinarello Treviso, 1990 Gardin Shred, 2006 Bianchi San Jose
Careful with the name calling; he with only half a crankset.
09-25-09 | 01:24 PM
#30
Thread Starter
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yeah 2.5mm's ain't much, less than an 1/8". that's like the thickness of a nickel difference. if i shimmed my cleat that would only make my leg go that much higher on the upstroke of the long arm. i have 3 different bikes, all with different arm lengths (170 fixie, 175 mtb, 165 crit road to be converted) and it doesn't **** me up when i switch bikes, but i do wonder if there will be a rocking effect especially riding no handed.
09-25-09 | 01:33 PM
#31
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From: A Coffin Called Earth. or Toronto, ON
Bikes: Bianchi, Miyata, Dahon, Rossin
yeah 2.5mm's ain't much, less than an 1/8". that's like the thickness of a nickel difference. if i shimmed my cleat that would only make my leg go that much higher on the upstroke of the long arm. i have 3 different bikes, all with different arm lengths (170 fixie, 175 mtb, 165 crit road to be converted) and it doesn't **** me up when i switch bikes, but i do wonder if there will be a rocking effect especially riding no handed.
2.5mm arm length difference on one side means...
5mm diameter difference in movement. one leg goes further, lower and higher than the other.
180mm cranks will make a 1,130.4mm circumference
177.5mm cranks will make a 1,114.7mm circumference
175mm cranks will make a 1,099mm circumference
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Food for thought: if you aren't dead by 2050, you and your entire family will be within a few years from starvation. Now that is a cruel gift to leave for your offspring. ;)
https://sanfrancisco.ibtimes.com/arti...ger-photos.htm
Food for thought: if you aren't dead by 2050, you and your entire family will be within a few years from starvation. Now that is a cruel gift to leave for your offspring. ;)
https://sanfrancisco.ibtimes.com/arti...ger-photos.htm
09-25-09 | 01:37 PM
#32
My bicycle is fixed
Joined: Apr 2006
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From: Auckland, NZ
Bikes: '08 Surly Steamroller, '07 Surly Cross Check
Whichever side has the shorter crank arm --- break that leg and set it slightly wrong. That should take care of the difference. Total cost to you: $0.00, unless you're not willing to HTFU and you cave in to pain killers.
09-25-09 | 01:54 PM
#33
poppawheelie
Joined: Jul 2007
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From: Victoria / Gifu
Bikes: Panasonic, Super Cycle
09-25-09 | 02:34 PM
#35
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yeah 2.5mm's ain't much, less than an 1/8". that's like the thickness of a nickel difference. if i shimmed my cleat that would only make my leg go that much higher on the upstroke of the long arm. i have 3 different bikes, all with different arm lengths (170 fixie, 175 mtb, 165 crit road to be converted) and it doesn't **** me up when i switch bikes, but i do wonder if there will be a rocking effect especially riding no handed.
09-26-09 | 10:35 AM
#40
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Joined: Aug 2009
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i've seen 177.5 arms for sale, just not the pista ones, only strada. like i said, right now all i can find are 175 and 180. soon enough all things pass through ebuey. it's just a waiting game now. i want the longer arms to complement my slow cadence and bigasss gear ratio, i'm rocking 81 gear inches, so i figure gaining that much extra leverage can only make these albuquerque hills seem smaller. the way my next conversion is designed, with the 177.5's, the pedals will still be 1/2 an inch higher than my current fix.
09-26-09 | 10:38 AM
#41
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From: A Coffin Called Earth. or Toronto, ON
Bikes: Bianchi, Miyata, Dahon, Rossin
the crank was cheap because it was an uncommon size and there was only one side of it.
__________________
Food for thought: if you aren't dead by 2050, you and your entire family will be within a few years from starvation. Now that is a cruel gift to leave for your offspring. ;)
https://sanfrancisco.ibtimes.com/arti...ger-photos.htm
Food for thought: if you aren't dead by 2050, you and your entire family will be within a few years from starvation. Now that is a cruel gift to leave for your offspring. ;)
https://sanfrancisco.ibtimes.com/arti...ger-photos.htm
09-26-09 | 10:59 AM
#42
Low car diet
Joined: Aug 2007
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From: Corvallis, OR, USA
Bikes: 2006 Windsor Dover w/105, 2007 GT Avalanche w/XT, 1995 Trek 820 setup for touring, 201? Yeah single-speed folder, 199? Huffy tandem.
09-26-09 | 02:26 PM
#43
hateful little monkey
Joined: May 2003
Posts: 5,274
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From: oakland, ca
