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paging @mdcc_tester
Losing the seat tube is fine as long as you make the remaining parts stiff enough. There are several reasons why it's a dumb idea, but frames without seat tubes can be made ridable and safe.
gbj_tester-
frames without seat tubes can be made ridable and safe.>
That's true for any tube on a frame*:
No top tube - any step-through ladies bike
No chain stays - Hotta
No seat stays - Giant MCM
No down tube or seat stays - Lotus
No seat tube - Kestrel
No seat tube or seat stays - Softride / Zipp
No right fork leg - Cannondale Lefty*except the head tube perhaps?
TheFinalHour
hmmm wouldn't this cherubim have too much vertical movement without the seattube? paging @mdcc_tester