Profile Design 43 ASC PRO Extensions 375 mm: extensions designed for an aerodynamic position

Carbon fiber extensions, 375 mm long

The Profile Design ASC Pro Extensions 375 mm represent the longest version in the ASC Pro range. They combine the extensions and armrests in a single unit designed to create an aerodynamic cockpit for triathlon and time trial racing.

The fixed 375mm body does not allow for direct longitudinal adjustment. This size should therefore be chosen when the rider's build and the bike's geometry require the longest version among the three options offered by Profile Design .

The adjustment options are retained on the ASC Pro mounts and compatible riser systems. Installation can be carried out directly on certain A3 handlebars or on A2 systems equipped with an A2-A3 adapter adding 15 mm of height.

ASC Pro Architecture

Integrated armrest extensions

The ASC Pro design combines the two functions into a single package to achieve a continuous surface and controlled architecture.

Historic one-piece design

This product marks Profile Design return to a type of extension that the brand had already explored with the Sonic Stryke nearly twenty years earlier.

Fixed length

The one-piece body cannot be adjusted in length. Position adjustments must be made using the supports and other cockpit components.

Length of 375 mm

Long version

The length of 375 mm is the largest of the three available dimensions.

• Short version available: 325 mm
• Intermediate version available: 350 mm
• Long version: 375 mm

Selection based on the desired position

This length is suitable for setups requiring more forward extension, subject to the bike's adjustability and the rider's position.

Aerodynamic design

Continuous surface

The integration of extensions and armrests reduces the number of separate fittings around the forearms.

Adjustments without compromising aerodynamics

The system was developed to offer a wide adjustment range while preserving the overall aerodynamic shape.

Comparison with a custom-designed cockpit

Profile Design presents the ASC Pro as a solution capable of offering comfort and aerodynamics comparable to a custom cockpit.

ASC Pro Supports

Specific fastening

The screw spacing and the shape of the mounting area are specific to the ASC Pro system.

Incompatibility with standard media

The extensions can only be mounted on ASC Pro Brackets.

Two offset options

• 5 mm offset
• 15 mm offset

System A3

Native compatibility

The ASC Pro supports belong directly to the A3 lift system.

Compatible hangers

• Profile Design Wing20C+
• Profile Design Wing20C+ II
• Profile Design Wing Ultimate S
• BMC Speedmachine basebars
• Canyon CP0041

System A2

Adapter required

Basic A2 hangers can be used with an A2-A3 adapter.

Height adjustment

The adapter adds 15 mm of height to the lift system.

Compatible A2 models

• Profile Design Aeria Ultimate
• Canyon HB0053
• Cube Aerium C:68
• Orro Venturi Tri
• Scott Plasma 5 Creston IC TT
• Wilier Turbine
• Wilier Turbine SL

Compatibility with frames and bicycles

Bicycles equipped with compatible Profile Design handlebars

Bikes already equipped with a Wing20C+ or an Aeria Ultimate may be compatible with ASC Pro depending on their configuration.

Frames that can accommodate a new base handlebar

Compatibility can also be achieved on a frame that accepts a standard 1.125" stem, i.e., 28.6 mm, or a specific stem with a 31.8 mm handlebar clamp.

Bicycles mentioned by Profile Design

• BMC Speedmachine
• Canyon Speedmax CF
• Cube Aerium C:68 Rim Brake
• Cube Aerium C:68X Disc Brake
• Cube Aerium C:68 TT
• Orro Venturi TT
• Quintana Roo equipped with an Aeria Ultimate or Wing20C+
• Scott Plasma 5 with Creston IC TT one-piece handlebar
• Wilier Supersonica
• Wilier Turbine
• Wilier Turbine SL

Details for the Canyon Speedmax CF

Restyled model since April 2024

All variants of the restyled model launched in April 2024 are announced as compatible.

Electronic models 2019-2023

The electronic versions are equipped with the H30 handlebar mentioned in the guide.

Mechanical Models 2019-2023

Mechanical versions require replacing the basic handlebar with a compatible solution.

Basebars not compatible

Old A1 system

Previous generation A1 lift systems cannot accommodate ASC Pro.

• Profile Design Aeria Evo
• Profile Design Aeria
• BMC TM01 Flat cockpit
• BMC TM01 V cockpit
• Scott Plasma 5 TTV
• Parlee TTiR basebars
• All round hangers using clip-on extenders
• Any specific hanger not present in lists A3 or A2

Technical specifications

Identification

• Product: Profile Design ASC Pro Extensions
• Length: 375 mm
• Version: long
• Type: Integrated extensions and armrests
• Adjustable body length: no

Assembly

• Compatible brackets: ASC Pro Brackets only
• Support with 5 mm offset: available
• Support with 15 mm offset: available

Lifting systems

• A3: Native compatibility
• A2: compatibility with A2-A3 adapter
• Height added with the adapter: 15 mm
• A1: not compatible

Recommended use

• Long distance triathlon
• Time trial
• Cyclists requiring a 375 mm extension
• Mounts seeking a compatible forward position
• A3 Cockpits
• A2 cockpits converted with an A2-A3 adapter
• Bicycles included in the Profile Design compatibility guide

Why choose Profile Design ASC Pro 375 mm?

• The longest version in the ASC Pro range
• Fixed length of 375 mm
• One-piece construction combining extensions and armrests
• Shape developed to minimize aerodynamic compromises
• Comfort is advertised as comparable to that of a custom-designed cockpit.
• Position adjustments made using supports and risers
• Brackets available with 5 or 15 mm offset
• Native compatibility with multiple A3 handlebars
• Compatible with certain A2 handlebars via an adapter
• Designed for compatible triathlon and time trial bikes