This was a VERY brief, like 2-year mid-1990's part by Cannondale that was supposed to have some of the same advantages as V brakes. Mountain bikes needed stronger brakes and that was the gist of the ad copy. But probably just as important, canti brakes were ill compatible with full suspension bikes due to their need for a cable stop on the floating link or the fork lowers. V brakes won. Shimano had essentially cornered the component market and V brakes were their baby. This thing disappeared.