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Old 07-14-13, 09:29 PM
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Andrew R Stewart 
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Bikes: Stewart S&S coupled sport tourer, Stewart Sunday light, Stewart Commuting, Stewart Touring, Co Motion Tandem, Stewart 3-Spd, Stewart Track, Fuji Finest, Raleigh Pro, Trek Cycle Cross, Mongoose tomac ATB, GT Bravado ATB, JCP Folder

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Above and behind the seat stays is the most common place to mount a caliper. The least interference with the rest of the frame. There is a concern about the SS taking the loads a disk will show it, bracing tube from the SS to the chain stays helps.

Between the stays and attached to the CS is the next likely location. The CS is usually beefier so long term tube failure is less. But fit and interference may be a problem. If a rack/fender are part of the package this location has pluses.

Really the only way to figure this out is to try to locate the caliper with a disked wheel in place. See where the problems are and what the solutions might be.

But before you even do this, are you up to speed with the welding issues of the grade of Alu used on this bike? You can do all the right design and machining and the frame will crack soon enough if the welding and post joining treatment is wrong. Andy.
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