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@Linc
I'm not normally a bike weight wenie. In fact I pride myself on riding a 10kg home build and passing the carbon TT bikes when I'm training in the park. This build, however, has got to me. I guess it comes from starting the design with a frame weight goal and being an anal engineer!
So here goes:
First frame half complete, second half is work in progress:
So that's 1270g for both halves of the frame
500g for all 4 stays
Seat post insert 74g
Bottom bracket insert 71g
Miscillaneous inserts for bottle cages, rear brake bridge and cable guides
Internal cable housings.
So far that's 2060g. Then there's another 150g for the head tube insert, 150g for drop outs, 200g for epoxy sealing coats and varnish and say 50g for internal stiffeners.
All up weight is looking to be around 2.5kg which is a lot more than I was anticipating. In fact I think the single speed frame came in at 2.6kg and this is a hell of a lot thinner and I've removed a lot more material around the joints. However it does have bigger tubes. Hmmmmm.......not sure what I miscalculated in the first place!
Anyway, there's not much I can do now and I certainly can't make the tubes any thinner.