Quote:
Originally Posted by bitpuddle
Out of curiosity, why do you care about the sta?
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Why wouldn't you. The STA will dictate the range of possible saddle positioning given a preferred saddle and post. It also informs the real world reach when looking at top tube length. Understanding the relationship between TT and STA will help inform options and guide decisions on seatpost setback, stem length and other reach related characteristics. A 55 TT with 74 deg STA and a 55 TT with 73 deg STA, both as most manufacturers measure, will have a roughly 1 centimeter difference in the "length" of the fit. Depending on where a rider fits in that range it could mean one bike won't get the saddle far enough forward without a compromise or that the other wont get the saddle far enough back. Sure it's just one number in a complex geometry, but it's an important one.