Mounting: Pro File Design Flip up Arm rest should be spaced 1/8" from your BarYak Rails . secure the bottom Bracket to the handlebar by inserting the “C" clamp bolts through the Top and into the bottom “C “ bracket, Using the 5mm Allen wrench, evenly tighten these bolts to a torque of 42–63in-lbs. (4.7–7.2N-m). Note: You may have to un-wrap the top section of handlebar tape in order to gain the desired clamping width. Do not route the brake or shift cable housing underneath the aerobar brackets—this will affect braking and/or shifting performance.