Tinkering. That’s how mountain biking was born and that’s part of what keeps it cool. These days fewer backyard engineers are bringing products to market, but those that are still push the envelope. One of them is Rus Kappius.
Kappius has come with an innovative rear hub design for mountain bikes that could be adapted for the road quite successfully. The design is dramatically different, and in my testing so far, the performance is impressive.