Shimano makes "long-reach" (47-57mm) versions of their dual-pivot sidepulls:
http://www.universalcycles.com/shopp...6&category=882
http://www.universalcycles.com/shopp...0&category=882
I've used these on a couple different bikes and they are some of my favorite brakes.
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Jeff Wills
Comcast nuked my web page. It will return soon..