Riser kits increase stack height to fit a wide range of riding styles for efficient positioning; compatible with ZBS Aerobars, T Plus Carbon Series Aerobars, T Plus Aluminum Series Aerobars, Supersonic Aerobars, Sonic Aerobars, and Subsonic Aerobars. - Multiple kits can be used to reach desired height up to 80mm rise - Raises armrest and extensions together to maintain a comfortable wrist position - Kit includes a pair of risers, bolts specific to riser size, and mounting hardware - Risers are compatible with J2, J3, and J4 Aerobar brackets - Clamp diameter: 31.8mm

Profile Design's Aerobar Bracket Riser Kit lets you customize the height of your Profile aero bar brackets and extensions for finding a perfect riding position. The kit includes two 10mm risers, two 5mm risers and appropriate-length bolts. Multiple kits can be used if you need more height. Note that this kit is not recommended for Profile Design's Carbon Stryke or T-mag bars.

T1 Plus Aluminum Aerobars with a double-ski bend shape allow riders to get in a lower rider position, minimizing drag, and allowing for more power output with a neutral hand position. - 6061-T6 Aluminum construction; shot peened with anodized finish - J2 Bracket: The extension bracket, isolated from the basebar bracket, allows for a wider range of armest adjustment possibilities. Easily adjustable in length and angular rotation for a customized fit. - F-19a Aluminum Armrest: 4 position fore/aft adjustment along with 15° of rotational adjustment to dial in the fit. Velcro-backed EVA Foam pads affix directly to armrest without additional straps. - Ability to increase stack up to 80mm with optional Aerobar Bracket Riser Kit. Tech specs: - Stack: 60mm-120mm - Reach: Max Aft -180mm, Max Fore 70mm - Extension Adjustment: 155mm-290mm (C of basebar-End) - Width: 145mm-300mm (center to center) - Center Clamp Diameter: Fits 26.0mm and 31.8mm bars - Color: Anodized Matte Black - Weight: 503g