Giant Contact Aerobar Clip-On Clamps Description: The Giant Contact Aerobar Clip-On Clamps are designed to attach aerobar extensions to a 2018-2022 Giant Propel road bike equipped with a proprietary aero-shaped handlebar. These aluminum hinged handlebar clamps easily attach to the handlebar without having to strip the handlebars of the shifters or any accessories first, and there is 30mm of available height adjustments to get the armrests exactly where you want them. Speaking of fit, these clamps will accept any round profile aerobar extension with a 22.2mm (or 7/8") diameter, and the included armrest holders and armrest pads feature additional width adjustability to dial in everything so your arms, neck, and shoulders stay happy when you are battling the wind in your aero tuck. Features: Proprietary handle bar clamp shape fits 2018-2022 Giant Propel road bikes with handlebars that have the aero shape across the entire top section of the bar Aluminum alloy construction is durable, light, and strong Hinged clamp design will install on handlebars that are already taped and have accessories on them 30mm of height adjustment to dial in the riders position Includes handlebar clamps, riser spacers, aerobar extension clamps, arm rests, arm rest pads, and hardware Designed to fit aerobar extensions with a round 22.2mm (or 7/8") diameter (sold separately)