Making brakes that slow down a bike is easy. But making them light, powerful, efficient, adjustable and durable takes a lot of experience and smart design. That's the stuff that Avid has made look so easy for years.
If you're fixing an older bike with V-brakes these Single Digit 7s are just what the doctor ordered. But if you want the most stopping power with amazing modulation and lever feel, you need to try the Shimano XT M785-B Disc Brakes.
I have been using these brakes for years and plan on using them for Direct Pull / V-style brake needs in the future. These brakes are intelligently thought out and well designed, the tension springs run on a small roller mounted on a metal pin on the backside of the individual arms. The noodle is a nice unit which has the little wiper / boot which the cable passes through. The mounting hardware appears to be stainless as well as the cable fixing bolt I have seen no signs of corrosion. The pads which come with this set are the kind which slide into the holder and are retained via a metal clip making replacement easy, quick, and very inexpensive. The pads are also grabby and free of squeal if properly setup. If you are running a bike using rim brakes, these brakes are worth it.
Great brakes. Easy set-up. Stop great.
If you are in the market for good brakes at minimal cost, SD7's are the way to go. They deliver solid braking power and won't empty your wallet.