Your new frame comes with Boost 148×12 mm standard and you want to keep your wheels 142×12 mm? Here we go: kit BOOST universal by HxR Components! With a special washer for the hub and the rotor, you can keep your favorite wheelset on your new frame. 2 spacers black anodized for the hub. 1 spacer black anodized for the rotor, 6 screws with long thread. 26g all included.