Thread: Is your top tube level?
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Old 02-09-11 | 05:11 PM
  #53  
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RonH
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Originally Posted by TromboneAl
OK, got it.

Here's the next question: How do you measure frame size if the TT is sloped?
My 2011 Specialized Tarmac is a size 56.5. The "effective" top tube length is 565 mm. Specialized says the "TT is measured horizontally from center of HT to center of ST". So I guess the effective top tube length is the new frame size measurement.
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