Profile Design 43 ASC PRO Extensions 325 mm: extensions designed for an aerodynamic position

Carbon fiber extensions, 325 mm long

The Profile Design ASC Pro Extensions 325 mm form a one-piece unit combining extensions and armrests for triathlon and time trial bikes. This 325 mm version is the shortest of the three lengths offered in the ASC Pro range.

Their design aims to offer a level of comfort and aerodynamics comparable to that of a custom-made cockpit, while retaining sufficient adjustability to optimize the rider's position. However, the one-piece body of the extensions cannot be adjusted in length.

ASC Pro handlebars require the use of specific ASC Pro mounts and are compatible with certain Profile Design base handlebars as well as a limited selection of cockpits specific to different bicycle brands. A3 systems are directly compatible, while handlebars using the A2 system require an A2-A3 adapter adding 15 mm of height.

One-piece design

Integrated extensions and armrests

The ASC Pro combines the extensions and forearm support area in an integrated construction. This architecture limits the number of separate components and allows for precise control of the overall aerodynamic shape.

Profile Design returns to one-piece extensions

With the ASC Pro, Profile Design returns to the category of one-piece extensions that it had helped to develop with the Sonic Stryke almost twenty years earlier.

Body not adjustable in length

The extension body cannot be shortened, lengthened, or moved independently of the armrest. Therefore, the length must be chosen based on the desired position and the compatibility of the cockpit.

Length of 325 mm

Shortest version

This version measures 325 mm. It is the shortest of the three available lengths.

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

Choosing the length

The 325 mm length should be selected according to the cyclist's morphology, the geometry of the bike, the desired aerodynamic position and the adjustment possibilities offered by the supports.

Aerodynamics

Integrated form

The one-piece design allows for continuity between the extensions and armrests without multiplying the junctions exposed to airflow.

Settings that preserve the shape of the system

The ASC Pro was developed to offer as many adjustment possibilities as possible without compromising the overall aerodynamic qualities.

Position comparable to a custom cockpit

Profile Design announces a level of comfort and aerodynamics comparable to that of a custom-made cockpit, while retaining possibilities for optimizing the position.

Position adjustment

Adjustments made to the supports

Since the extension body is fixed, position adjustments rely primarily on the ASC Pro mounts, spacers, and the possibilities offered by the compatible base handlebar.

Two support offsets available

The extension cables can be used with two versions of ASC Pro mounts.

• Support with 5 mm offset
• Support with 15 mm offset

ASC Pro supports required

ASC Pro extensions can only be installed on ASC Pro brackets. They require a specific screw spacing and mounting surface shape.

A3 system compatibility

Native compatibility

The ASC Pro brackets are part of the A3 riser system. They are therefore directly compatible with A3 components, without an A2-A3 adapter.

A3 base hangers compatible

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

A2 system compatibility

A2-A3 adapter required

Handlebars using the A2 riser system are compatible with the addition of an A2-A3 adapter.

Extra height

The A2-A3 adapter adds 15 mm to the overall height of the cockpit struts.

A2 compatible basic hangers

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

Bicycle compatibility

Bicycles already equipped with a compatible handlebar

The ASC Pro can be considered on bikes already equipped with a compatible Profile Design Wing20C+ or Aeria Ultimate handlebar.

Executives accepting a compatible cockpit

A frame that can accommodate a standard 1.125" stem, i.e. 28.6 mm, or a specific stem equipped with a 31.8 mm handlebar clamp may be compatible after installation of a suitable Profile Design base handlebar.

Bicycle models listed as compatible

• 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 a Wing20C+
• Scott Plasma 5 equipped with the Creston IC TT one-piece handlebar
• Wilier Supersonica
• Wilier Turbine
• Wilier Turbine SL

Compatible with the Canyon Speedmax CF

Restyled models from April 2024

All versions of the restyled Canyon Speedmax CF, which will be available from April 2024, are listed as compatible.

Electronic versions from 2019 to 2023

The electronic versions of the 2019 to 2023 models have the H30 handlebar indicated as compatible in the guide.

Mechanical versions from 2019 to 2023

The mechanical versions of the 2019 to 2023 models require the replacement of the basic handlebar with a compatible model.

Incompatible mountings

Profile Design System A1

Older hangers using the Profile Design A1 riser system are not compatible.

Incompatible hangers and cockpits

• Profile Design Aeria Evo
• Profile Design Aeria
• BMC TM01 Flat Cockpits
• BMC TM01 V-shaped cockpits
• Scott Plasma 5 TTV
• Parlee TTiR Basic Hangers
• Round hangers that accept clip-on extension bars
• Bike-specific handlebars not listed in A3 or A2

Technical specifications

General Information

• Product: Profile Design ASC Pro Extensions
• Length: 325 mm
• Type: One-piece extension tubes integrating extensions and armrests
• Adjustable body length: no
• Number of lengths available in the range: 3

Supports

• Required brackets: ASC Pro Brackets
• Offset option: 5 mm
• Offset option: 15 mm
• Compatibility with other devices: not announced

Lifting systems

• Native compatibility: A3 system
• A2 compatibility: with A2-A3 adapter
• Height added by the A2-A3 adapter: 15 mm
• A1 compatibility: no

Recommended use

• Triathlon
• Time trial
• Cyclists looking for a one-piece cockpit
• Practitioners looking for a length of 325 mm
• Mounts on Profile Design base handlebars
• Specific bicycles listed in the compatibility guide
• Optimizing an aerodynamic position

Why choose Profile Design ASC Pro 325 mm?

• One-piece construction combining extensions and armrests
• 325 mm short version
• Aerodynamic design
• Comfort level advertised as comparable to a custom cockpit
• Adjustment options retained despite the fixed body
• Two available support offsets
• Native compatibility with A3 systems
• Compatibility with A2 systems via an adapter
• Compatible with several Profile Design handlebars and specific cockpits
• Designed for triathlon and time trials