Mon-Sat 8am-5pm PT
Bike Tires Direct logo. Link to homepage.
Serving cyclists
since 2002
CLICK HERE to join our Email List and get 15% off your first order*
*Restrictions Apply. Click for details.


Components > Cockpit & Pedals > Aerobars

Product Images

Profile Design 43 ASC Carbon Extensions
Profile Design 43 ASC Carbon Extensions
Click Here for Larger Image
Profile Design 43 ASC Carbon Extensions 1
Profile Design 43 ASC Carbon Extensions 2

Profile Design 43 ASC Carbon Extensions

Pricing and Order Section

Mfg PartNum: ACASC43EXT400
$285.00 set
MSRP: $285.00
That's off
In Stock
Ships Free!
Earn $11.40 in VIP credit. Click to Learn More.
This color/size is not eligible for VIP points
Price matches are is not eligible for VIP points


43 Degrees Of Comfort & Speed

The Profile Design 43ASC is intended to optimize the aerodynamics of your existing bars but pairs exceptionally well with either the Race+ or Ergo+ armrest, giving you the ideal supportive position which will help you be relaxed while riding, and the key to speed is relaxation. These will fit in any aerobar that is designed for 22.2mm, so can be used by any rider wishing to improve the comfort of their aerobar grips.

When designing these extensions Profile Design wanted to utilize carbon fibers' natural ability to be shaped into an aerodynamic form while still providing a good amount of strength and rigidity, hence ASC stands for Aero Shaped Carbon.

Looking at the grip section, they have a 87mm rise from the base of the extension to the grip with the grip angle being set at 43 degrees. The reason for a 43 degrees grip angle is to give a neutral wrist position which helps the rider to be in a more relaxed position.

The fit by the wrist area is designed to smooth airflow over the arm and to increase contact area which will provide some extra comfort and to give you more control over your bike. The shape was optimized using CFD to minimize drag without sacrificing strength.


  • Extension Length: 340mm or 400mm
  • Min Length: 340mm: 230mm or 400mm: 290mm (from the front of clamp)
  • Extension Angle: 43 Degrees
  • Extension Rise: 340 - 97mm or 400 - 107mm (bottom to top)
  • Extension Offset: 16mm total
  • Outer Diameter: 22.2mm
  • Includes: Sold as a Pair (1 Right and 1 Left Extension)
  • Construction: Carbon
  • Colors: Matte Black
  • Weight: 340 - 245g or 400 - 255g /pair

B-Stock - This product has one or more B-Stock units available. These units can be purchased at a discount (see option select). B-Stock units were returned from other customers and may have missing or damaged packaging materials. These units are otherwise as new. The full manufacturer warranty applies. Click Here for more information.


Mfg PartNum: ACASC43EXT400 

additional content loading
additional content loading
additional content loading

We are committed to delivering outstanding value and service to our customers, every day.
Try us today to see why so many of our customers come back again and again.

*Orders received before 3:00PM Pacific time are shipped the same day (Mon-Fri). Orders over $50
are shipped free (USA only, excluding AK and HI). Some exceptions apply. See Shipping for details. 1

5741 NE 87th Ave (I-205 exit 23B) Portland, OR 97220 | 800-682-0570 | [email protected]