Frame size question
08-14-17 | 11:34 AM
#1
Thread Starter
Full Member
Joined: Mar 2017
Posts: 442
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From: Franklin, TN
Bikes: 2016 Cervelo R3 & 1999 Litespeed Tuscany
Frame size question
I have a 61cm frame but when I look at the geometry chart for my bike, none of the measurements are 61cm. So, what does the frame size actually measure?
08-14-17 | 11:38 AM
#2
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Joined: May 2016
Posts: 121
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From: Arlington, VA
A lot of times these days they use virtual points like "effective top tube" which would be the distance from the center of the head tube to the center of the seat post on a horizontal line. It could also be a measurement of the seatpost, from the bottom bracket to that same virtual point
08-14-17 | 08:16 PM
#4
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From: Wilmington, DE
Bikes: 2016 Hong Fu FM-079-F, 1984 Trek 660, 2005 Iron Horse Warrior Expert, 2009 Pedal Force CX1, 2016 Islabikes Beinn 20 (son's)
08-15-17 | 06:38 AM
#5
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It depends. All manufacturers size differently. Some go off actual top tube or actual seat tube lengths. Others go off virtual top tubes.
Some stick with historic sizing, so they used to have a 61 and the new geometry is different but they still call it the 61 because that's what they always had there, and that size should fit the people who used to buy the 61.
Others avoid the whole issue with S, M, L.
Some stick with historic sizing, so they used to have a 61 and the new geometry is different but they still call it the 61 because that's what they always had there, and that size should fit the people who used to buy the 61.
Others avoid the whole issue with S, M, L.
