Originally Posted by
bradtx
Triple, double and single are terms often used to define the number of chain rings on the crank set. In "modern" terminology you have a 7 speed with a triple. Because you have V-brakes and road shifters, there should be a gadget attached to the brake cable to equalize pull ratio.
Emphasis on *should*
Just to clarify for the OP: road brakes and mountain bike (mtb) brakes are not interchangeable, as they both pull a different amount of cable. You already have an odd set up, as STI's/integrated-shifters are going to pull the correct cable for road brake calipers while v-brakes are actually a mtb style. Since you have this mixed system, that would imply that you have an adapter known as a "travel agent." If you install a mtb brake lever, you will want to remove this device... assuming that one is installed, which there should be, but who knows?