Unfortunately, it didn't quite play out that way. I knew there would be an issue with brake reach, as the calipers would have to reach down a little farther from the old 27 inch wheels to the 650B size, about 23 mm more, or 9/10th of an inch.
Knowing brake reach would be in issue, I ordered a set of Tektro 556 long reach brakes. These brakes range from 55mm to 73mm from the center of the mounting bolt to center of rim. This was complicated by the fact that the supplier sent only the rear brake, but they've acknowledged the error and have put the front brake in the mail.
However, I wasn't prepared for the disappointment when I got the brake and found that it's no longer than the stock brake that came on the Schwinn!
In the next picture you can see that I am pinching the calipers against the rim. You can see how far down the mounting bolt needs to be.
The stock brakes have a long hex bolt with nut that runs through concave shaped nuts that hold the brake in place against the horizontal brake mounting tube. The Tektro brakes use recessed mounting. I've read that I can drill the rear hole in the tube and in the fork crown to allow me to use the recessed nut. I've also seen Sheldon Brown's "drop bolt" solution. Any suggestions?
Today I got the Panaracer 650B x 38mm tires in the mail. They were about $20 a tire and have an interesting inverted tread. My LBS is ordering some 650B tubes for me.
So, again at a cross roads, I am not sure what to do. Here come the obligatory lists.
Continue to 650B-ify the Schwinn:
- drop bolts on brakes (ugly, but cheap)
- have frame maker move the mount (pretty, but expensive)
- find longer reach brakes, if they even exist (probably expensive)
- Convert it to 700C and use the original brakes
- Convert it to 700C and use the Tektro brakes after figuring out to to use the recessed mounting bolts
- sell the 650B wheels
- keep the 650B wheels and find another frame