Thanks, Rich, but those are a completely different type of caliper from what's found on a full "road bike." I was able to find replacement calipers designed for wider tires. IMO, the best solution for the whole situation is disc brakes: easy off and on without having to mess around with calipers and cables at all. And how many of us have made the mistake of riding off without putting the cable back, only to discover that we had no brakes the first time we tried to use them?