In my case this was one time I'm glad I didn't go and buy a brake off ebay or where ever on-line. I probably would've wound up with the same incompatibility and stuck with the part or S&H it back and forth to get the right one if that was even an option ? The first u-brake they got for me was the wrong one and it was $ 30, the Dia Compe came to $ 40. Both brand new, but the LBS took the first part that didn't work and I paid the difference and wound up with the right u-brake and was happier for it. I prefer it to a Tektro, the on-line cost for brand new was the same with S&H for Dia Compe u-brake. The Tektro was a bit less, but not enough that over 10 years or whatever I intend to keep & use the bike, the extra cost comes to maybe $ 1/year, less than a dime per month. That's my advice for components, if the part is used over that kind of a lifespan and you're the one that's going to use it that long, pay the extra $ 10 for the component you want. Obviously for the identical component, nab the cheaper one, but enough of a design and quality of workmanship part, $ 10 more is negligible.