The ASC Pro is Profile Design's one-piece carbon extension: an integrated extension and armrest that hugs the arm from the 43° grips back to high-sided arm cups modelled on the Race+ shape. It aims for the comfort and aerodynamics of a custom bar while keeping enough adjustment to set your position.

Highlights

• One-piece carbon extension and armrest
• 350 mm long (also made in 325 and 375 mm)
• 43° grips with a 15° base angle
• Tilt wedges (sold separately) set the angle anywhere from 5° to 25°
• 10° of rotation adjustment
• For Di2 and SRAM AXS wireless shifting

Sizing and adjustment

The extension body isn't adjustable for length, so choose the length that suits you; Profile Design publishes a buyers guide and sizing chart. ASC Pro tilt wedges come in positive and negative 1° to 5° kits and change the 15° base angle by up to ±10°. The included switch adapter reduces reach by 20 mm when the brackets are flipped, and reverses the wedge angle. A 5 mm offset bracket kit is also available.

In the box

Left and right extensions, left and right elbow and forearm pads, left and right 15 mm offset brackets, two switch adapters, four M6 × 16 mm bolts, two normal and two cut barrels, and four washers. Riser bolts aren't included: order them individually or as part of an A3 riser kit.

Compatibility & fit

ASC Pro extensions fit only ASC Pro brackets. The brackets are part of the A3 riser system: natively compatible with the Wing 20C+, Wing 20C+ II and Wing Ultimate S, BMC Speedmachine base bars and the Canyon CP0041. Base bars on the A2 riser system (including the Aeria Ultimate) need the A2-A3 adapter, which adds 15 mm of stack. Not compatible with A1 riser system bars (Aeria Evo/Aeria), round base bars that use clip-on aerobars, or bike-specific bars not on Profile Design's compatibility guide. Above 40 mm of total stack a bridge is mandatory. Bolts torque to 6 Nm. Compatible accessories include A3 riser kits, the ASC Pro Computer Mount and Heat Shrink Wrap.

Aerobar fitting and position set-up is a separate workshop service and isn't included in the price. Our workshop can fit the ASC Pro and set up your position.