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Discussion Starter · #3 ·
ok that works but when u r picking a bike and it ask what size u want which number or measurement is it refering to
 

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The most important sizing on the frame will be the seat, and top tube dimension. Together these tubes dimensions make up the "frame size". The seat tube length is determined by your inseam measurement, its adjusting factor is your seat post and crank length. The top tubes is fit to your torso and “reach" measurements, with adjustments made in bar stem length and seat position. Each frame has its own geometry design, there are some designs that fit some riders better than others.

If you follow the Wrench measurements step by step it will produce a fairly accurate gauge for your size. Again I've dealt with the guys there on several occasions and they are awesome for getting advice.
 

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shagy423 said:
ok that works but when u r picking a bike and it ask what size u want which number or measurement is it refering to
It refers to the manufacturer size for that model. That number may or may not have any basis in reality as far as actual measurements of any part of the bike.

You really need to look at the manufacturers geometry specs for whatever listed "size" you are buying.

Or talk to the vendor.
 
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