kitabel wrote:Very nice work.
On the rear caliper mount: this is always a compromise.
The caliper is a PITA to bleed if the fitting isn't close to vertical, so moving the C of G a bit by rotating in to the 6 o'clock position has a service penalty.
The caliper will (of course) attempt to rotate forward (CCW, as seen from the left) when pressure is applied. However, some part of the chassis will generally stop it; the question is where, and what does it do?
Since the frame is rigid, there is no point in transferring brake torque to the main frame (as would be true in a swing-arm, but seldom done for cost reasons) so any anchor point (or none) serves equally well as to brake function.
Since the caliper mount cannot mis-align (it's on the axle, and will also self-center when applied) a heim joint or even a link isn't needed, the caliper could be simply left to rotate until it contacts the frame rail.
The remaining question is where the chassis is torqued. I'd like to see what running a torque link from the caliper forward to the seat post would do - it appears that this would avoid stressing the (known) weak joint where the seat pan attaches.
George Greer wrote:and I said to myself when I started, that I wanted No mods to the frame.....Just work around it. George
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