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How to measure the size of a bicycle …?
I have a 1980 road bike Guercotti I'm trying to sell on craigslist. I've been away cycling for twenty years and forgot how to measure the image. I have had much interest in it from my position, but the only answer to "what is the size "I have is" unknown ". I am 5'-10", and the top tube is pertfect where it belongs. Any help would be appreciated. Thank you.
For most road bikes – and in particular steel framed bikes, like his Guercotti – are measured by the length of the seat tube. This is measured from the center of the bottom bracket center (the screw rod) in the center of the constellation of security, which blocks the top part of the structure connects the top tube, seat tube and stays the backseat. This measure is known as a center-to-Center and using the diagram from Peter K referred to above that the measurement be "B". This is the method of measurement used in most steel framed bikes. In other bikes which have different frame materials – such as aluminum or carbon fiber – achieve correct measuring point in the cluster of seat can be problematic. For this reason, aluminum and carbon fiber framework (and sometimes Titanium also) will use the Center-to-best measurement method which in turn starts from the center of the shell BB and measured vertically from the seat tube until to the top of the seat tube where it attaches to the seatpost. Again, using the diagram from Peter K this is illustrated by the measure "A". A final note is most all road bike frames are measured in centimeters (cm) as opposed to inches. Hope this helps.
Bicycle Frame Repair – top tube removal part 2
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