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i was under the impression the difference between Alan and Vitus is that Alans are threaded tubes pasted with bond and screwed in
vitus just bonded tubes into lugs
i learnt this through the CIA, google
deleted-
i was under the impression the difference between Alan and Vitus is that Alans are threaded tubes pasted with bond and screwed in
vitus just bonded tubes into lugsYour impression is generally correct, except that Vitus lugs plug into the tubes rather than the other way around, so the outside of the lug is more or less flush with the outside of the tube.
gbj_tester
Because reliable glue became available, and stronger aluminium alloys. Bonded frames like Alan and Vitus solve all the problems I listed above (even if they introduce new ones of their own). Even they were only moderately successful at a fairly high price, it took the introduction of alloys which could achieve full strength with post-weld heat treatment to make aluminium frames mainstream.