Showing posts with label angles. Show all posts
Showing posts with label angles. Show all posts

Monday, July 22, 2013

Seat clusters


seat clusters are where the seat stays join the seat tube and sometimes also the top tube
there's a lot of different ways this can be done.
sometimes its integrated into a lug
the cluster also has to incorporate the action of the seat post clamping bolt
a tiny distortion of the seat tube of only fractions of a mm.
makers worried about rip-offs tend to put some kind of embossing in the seat stay cap
their name or logo
really good bikes don't care so much
but it's a lovely detail all the same




Diamond frame, handbuilt in the 50s in Geelong from 531


Centurion, lovely chromed, wrap-around stay caps


Dawes Super Galaxy


F.W. Evans


As the name suggests, with curly stays n'all


Elvin? Elwin? tarck bike


Michalo
lovely resto with complete Superbe Pro group


recently made bike I forgot who by


immaculate Concorde with gold-plated stays


fancy chromed cluster but somehow 
not as lovely as when they wrap to the front of the seat tube.

Saturday, May 4, 2013

Frame geometry - Routens and Aerospace Sport


getting curious about things like frame geometry
and in particular head and seat tube angles
next stop is working out fork offset