Odd (?) frame dimensions
07-15-23, 02:27 PM
#1
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Odd (?) frame dimensions
I have a mystery frame that I built into a bike; pics here:
Who made my favourite bike (frame)?
The reason I'm also posting in this sub-forum is to ask if these numbers (all c-c) are peculiar:
Seat-tube 50cm
Top-tube 54cm
Chainstay 42cm - crank to axle
Seatlug says 75, can't see an angle on the head lugs.
Wheelbase is 99cm but the fork isn't original.
Who made my favourite bike (frame)?
The reason I'm also posting in this sub-forum is to ask if these numbers (all c-c) are peculiar:
Seat-tube 50cm
Top-tube 54cm
Chainstay 42cm - crank to axle
Seatlug says 75, can't see an angle on the head lugs.
Wheelbase is 99cm but the fork isn't original.
07-15-23, 05:02 PM
#2
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I don't think it's a Austro-Daimler, but their dimensions were a little out of whack like that.
07-17-23, 07:52 AM
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I don't think these numbers are so far off base from common small sized sporting bikes. Seat tube/top tube is "over square", a large frame would be "under square" usually. That "75" on the seat lug doesn't mean the seat tube angle is actually 75*, just that it is what the lug was made for. Stamped sheet metal lugs can tolerate a couple of degrees of fit from the OEM angle. So this frame could have a 74 seat angle which on a small frame is quite typical. Chainstay length is pretty common and so is the wheelbase.
This frame is close to what I might ride. Andy
This frame is close to what I might ride. Andy
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