puckett129

... and is it a good idea?

I want a road bike with disc brakes and lots of clearance for fenders. I like the look traditional geometry and lugs. I've got an old Bridgestone 400, originally designed for 27" inch wheels. I want to have disc tabs mounted on the frame and fork, have the rear dropouts replaced to vertical dropouts, and have the rear spaced to 135 before powder-coating the whole thing.

I know the BB will be a little lower than intended since it was made for 27's. Is this a major concern? I also suspect there may need to be some work at the rear brake bridge after spreading the rear that much? Other than that am I missing anything? I really think this would make a very cool, custom disc road/commuter which can take wider tires and accommodate fenders.

If I'm not crazy... who would do this? I've seen lots of frame builders, but not sure how many will do this type of "repair."

Thanks.

Mark Kelly 

That basically amounts to "replace the entire rear end of this frame". It can be done, but expect to pay roughly the cost of a new disc frame from say Surly.

IMo the lower BB is an advantage, not a disadvantage. Many bikes are designed with high BBs to comply with US CPSC regulations.

Andrew R Stewart 

I would hope no one will add disk tabs to the fork. It was never designed to handle the forces that a powerful hub brake can dish out.

For only a bit more then the cost to change out the Bridgstone you can get a Surly frame. Andy.

unterhausen

I think it will be tricky to fit the discs inside the chainstays

puckett129

Ok, gotcha... probably can be done and probably not a good idea. Last night, (possibly under the influence) I purchased an All-City Macho Man disc frame. It looks like it'll accomplish what I'm looking to do here with the exception of being the only one of its kind.