Bike Forums - View Single Post - Why are compact frames stiffer?

10-06-09 | 01:17 PM

#101

Road Fan

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From: Ann Arbor, MI

Bikes: 1980 Masi, 1984 Mondonico, 1984 Trek 610, 1980 Woodrup Giro, 2005 Mondonico Futura Leggera ELOS, 1967 PX10E, 1971 Peugeot UO-8

Quote:

Originally Posted by Mike Mills

Well, actually, all other things being equal, the sloping top tube would be less stiff than its shorter cousin (the level top tube). This is due to the extra length which, as you may know, is a major driver in stiffness.

Sounds backwards -- why would a sloped TT be longer than a horizontal TT on two bikes of the same size and geometry?

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