I am using the Paragon plate style sliding drop outs with the belt drive option on this frame. I wanted to maximize the contact area at the chain stay dropout location. So I brazed a piece of thick walled 4130 aircraft tubing into the end. After this end is slotted and contoured, it will be silver brazed to the stainless steel tab on the dropout.
Bending and Squeezing the chain stays. This frame is built with 420mm chain stays, clearance for 29x2.4 tires and designed to allow a 46 tooth belt "chain wheel". It seems like everything wants to occupy the same physical space - so the chain stays needed some squeezing. This setup did the job nicely - although it was somewhat iterative - someday perhaps a hydraulic press with some custom hardwood dies will do it all in one step...
The gussets for the top and down tube, ready to TIG on.
Getting there - next up the super long seat stays with internal cable routing, and connection to the top tube and head tube.
This frame was designed to utilize a single speed belt drive or chain, as well as a 1x9 chain cassette. The cables for the rear hydraulic brake and the optional rear derailleur are being routed through the seat stays that run from the rear drop outs to the head tube.
Ready for the painter to take it from here..
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