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Singlespeed & Fixed Gear "I still feel that variable gears are only for people over forty-five. Isn't it better to triumph by the strength of your muscles than by the artifice of a derailer? We are getting soft...As for me, give me a fixed gear!"-- Henri Desgrange (31 January 1865 - 16 August 1940)

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Old 09-29-12, 03:30 AM   #1
JDMKidBill
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Ambiguous Frame Size is Ambiguous

So I have recently found out my frames are not ~54cm, but 56cm top tube length for my road bike and ~58cm top tube length for my fixed gear. Yup. Well, you learn something new almost everyday.

Why do you think bike manufacturers come up with crazy ways on measuring a frame? It seems ambiguous and inconspicuous if that measurement is referring to seat tube length from the bottom bracket to the top of the seat post or the top tube length. Isn't the top tube length the most important when considering a frame's size? Then follows the stand over height? Or am I missing something...
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Old 09-29-12, 05:23 AM   #2
mihlbach
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Forget about frame size. Read the geometry chart carefully before you buy.
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Old 09-29-12, 07:36 AM   #3
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Just different ways to measure. Yes, in general top tube length is the more critical measurement but even that can be substituted some by stem length. Seat tube length is measured both ways - center to center and center to top, depending on the mfg. Just the way it is.
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Old 09-29-12, 07:44 AM   #4
Bat56
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Quote:
Originally Posted by JDMKidBill View Post

Why do you think bike manufacturers come up with crazy ways on measuring a frame?
Dude, bikes are built all over the world; different time zones throw off measurement schemes. Haven't we been over this?
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