Road Mountain Bike Bicycle Alloy Triathlon Aero Rest Handle Bar Clip On Tri Bars Tri bars with clip on arm rests and pads (pads are removable for easy cleaning). Tri Bar Diameter: 22.2 mm/ 0.87 inches. To Fit Handlebar Diameter: 27.2mm - 31.8mm / 1.07- 1.25 inches bars. Fits to your existing base bars via 2 x included fixed mounts. Foam padding at hand rests. Size of handlebar: 34 x 4 x 2.2cm / 13.38 x 1.57 x 0.86 inches.