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Trek Crank Length
Shorter crank arms make for quicker spinning, longer crank arms make for better hillclimbing (via increased leverage)... or, at least. that's the common wisdom. I've never really noticed that the crank lengths made that big of a difference in either casre. |
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#2
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Trek Crank Length
In article ,
"Garrison Hilliard" wrote: Shorter crank arms make for quicker spinning, longer crank arms make for better hillclimbing (via increased leverage)... or, at least. that's the common wisdom. I've never really noticed that the crank lengths made that big of a difference in either casre. Thats what I have been told all these years. But who really knows until maybe you have tried them? My MTBıs and Hybrids have 175 crank arms. My Lemond roadie has 172.5ıs I canıt really tell the difference. Both are comforable. HAND -- ³Freedom Is a Light for Which Many Have Died in Darkness³ - Tomb of the unknown - American Revolution |
#3
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Trek Crank Length
Garrison Hilliard wrote:
Shorter crank arms make for quicker spinning, longer crank arms make for better hillclimbing (via increased leverage)... or, at least. that's the common wisdom. I've never really noticed that the crank lengths made that big of a difference in either casre. Crank length *should* be related to your thigh length to ensure your knee articulates through a sensible angle. Unfortunately most manufacturers (and retailers) set a premium on anything other than 170mm or 175mm. I'd love some 165mm MTB cranks but Shimano only make XTR ones, which are about the price of a cheap foreign holiday. |
#4
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Trek Crank Length
Garrison Hilliard writes:
Shorter crank arms make for quicker spinning, longer crank arms make for better hillclimbing (via increased leverage)... or, at least. that's the common wisdom. I've never really noticed that the crank lengths made that big of a difference in either casre. Well I think crank is this: http://www.campagnolo.com/pics/03_REguranitura.jpg and a crank-arm is this: http://www.classicrendezvous.com/Italy/PMP_crk_ad.htm and a crank-arm-lever is this: http://www.classicrendezvous.com/Rar...rest_pics3.htm # Crank: # 1 : a bent part of an axle or shaft or an arm keyed at right angles # to the end of a shaft by which circular motion is imparted to or # received from the shaft or by which reciprocating motion is changed # into circular motion or vice versa This is like all the rest of popular embellished speech, where there are no roads but roadways, it doesn't rain, we have rain storms or worse, rain storm systems moving through our area. All this seems to IMPACT on understanding instead of affecting it? Jobst Brandt |
#6
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Trek Crank Length
Zog The Undeniable wrote in message ...
Crank length *should* be related to your thigh length to ensure your knee articulates through a sensible angle. Minor point, but leg length would be a better (and easier) measure for "standardising" knee angles. For a given leg length, linking crank-length to thigh-length tends to standardise hip angles. According to my calculations if you link 2 great pearls/myths: KOPS and "cranks proportional to femurs", everybody's thighs end up doing very nearly the same thing in relation to an upper body inclined at a given angle to the ground (ankling idiosyncrasies aside). This approach would tend to standardise the "aerodynamic tuck" situation (while leaving the knees to their own devices) and is used by a good few bike fitters. Not sure this is their rationale, though. Andrew Bradley |
#7
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Trek Crank Length
"Garrison Hilliard" wrote in message ...
Shorter crank arms make for quicker spinning, longer crank arms make for better hillclimbing (via increased leverage)... or, at least. that's the common wisdom. Gears are there for leverage adjustments. Using shorter cranks for spin defeats the object. Andrew Bradley |
#8
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Trek Crank Length
wrote:
This is like all the rest of popular embellished speech, where there are no roads but roadways, it doesn't rain, we have rain storms or At a time of year when rain and snow are likely, how would you uniquely describe heavy rain accompanied by high winds and thick cloud cover? -- David Damerell Kill the tomato! |
#9
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Trek Crank Length
At high RPM's I can tell the difference between my 172's and my 168's, so I
imagine, although I never spin that high for that long on a Mtn bike, that my 175's are not for spinning. For road riding, spinning to me is over 110Rpms, 90 is crusing and 105 is in the grove, 120 to 130 is to train or strain. HTH JeffP.... "Andrew Bradley" wrote in message om... "Garrison Hilliard" wrote in message ... Shorter crank arms make for quicker spinning, longer crank arms make for better hillclimbing (via increased leverage)... or, at least. that's the common wisdom. Gears are there for leverage adjustments. Using shorter cranks for spin defeats the object. Andrew Bradley |
#10
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Trek Crank Length
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"Andrew Bradley" wrote in message . com... "Garrison Hilliard" wrote in message ... Shorter crank arms make for quicker spinning, longer crank arms make for better hillclimbing (via increased leverage)... or, at least. that's the common wisdom. Gears are there for leverage adjustments. Using shorter cranks for spin defeats the object. _ But you can spin faster if you don't have to bend your knees as much. I am definitely more comfortable on 165's than 175's at higher RPM's. Use gears to adjust force, crank length to make your knee's happy. I think there is some arguement to using shorter cranks for touring as it's easier to make many small steps rather than many bit ones. You do need to make your gears smaller if you use shorter cranks to avoid overstressing your knees. _ Booker C. Bense -----BEGIN PGP SIGNATURE----- Version: 2.6.2 iQCVAwUBP/7rOmTWTAjn5N/lAQGbugP/eGOb5y/Mzz8OdgQIw9ZdRovvdNO9yaOx qv8tnTmQVPYeQOSUWFYm6h75t1HJI3RP6kBpk2oWrm6UL7rMOS URGOExPdN4alWw y3HdnYMJQ2BE4BAfSRIKQuxMnSkdQVxXx6TN3HlIY1cKu+Fm4d yVaXvYwklrbhg9 p/FTGjf2P7k= =YNvW -----END PGP SIGNATURE----- |
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