The master cylinder is combined with either our X2, E4 or V4 calipers will suit any riding for XC to Enduro/All mountain to DH. The design is derived from the proven Tech 3 master cylinder and with the finger reach and bite point adjustments on each lever, you can be sure the levers will feel comfortable and suit your riding style. The Tech 3 Duo Master differs from our Uno system as there is a total independency between the front and rear calipers.