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@PhilDAS With a horizontal top tube, wouldn't it make sense that I need the same seat tube length I have on other horizontal top tube bikes - the top of the headtube would be in the same place wouldn't it?
The top tube is fine, just don't want a tower of spacers.
@Glws Weirdly it is an optimo one - seat tube is 56cm to the top of the tube, obviously less to the centre of it.
Juicy8-
With a horizontal top tube, wouldn't it make sense that I need the same seat tube length I have on other horizontal top tube bikes - the top of the headtube would be in the same place wouldn't it?
Only in height, it could be any length.
I'm sure it's fine for a general rule of thumb. It's just handy knowing your ideal measurements in other dimensions. -
YGDM
PhilDAS
roadiesean
Is the headtube too low and the top tube too short?
Seat tube length is really not a good indicator of frame size. You could make exactly the same size frame with a 50cm seat tube or a 60cm one, the position wouldn't necessarily change