Well it's true and nice brake theraphy as they suggested, how about the downside of this kind after you use it. especially when you had flat tire or sometimes when full out the whole rear tires for a reason.Sometimes minutes is very important while you in the trails. Can you guys who already have this kind of therapy can you pls.tell their nice story or worse nigntmare about this. Well guys I have simple suggestion when it comes to disc adapter. How about disc adapter fix to drop-out with single bolt or two. or adapter being fix to drop-out by single bolt and this long arm extended to V-brake mounting bolt. Its stiff and strong and no hazzle fulling out the tires. I know this b-coz I do this fabrication to a local bike groups. and they had 99.99% satisfied in this kind of disc adapter. Enjoy & safe ride.