50 SLC Carbon Extensions
50 SLC Carbon Extensions
50 SLC Carbon Extensions
50 SLC Carbon Extensions
50 SLC Carbon Extensions
50 SLC Carbon Extensions

50 SLC Carbon Extensions

Regular price$180.00

  • In stock, ready to ship
  • Backordered, shipping soon

The Super Light Carbon (SLC) series brings the low weight of the 35C + to our standard carbon extensions. 

Improvements in manufacturing allow us to upgrade our carbon extensions for lower weight and the ability to fit Di2 parts inside using the Aeroport.


The sole purpose of extensions is to provide a comfortable position for the riders hands relative to the armrests. They enhance performance by allowing the rider to relax into their optimal position.  Which is why we provide different fit options so each rider can chase their best performance.

Fit Data

  • Extension Shape: The 50 slc extensions offer a 50deg ski bend shape. 
  • The 50 slc offer a 7.5mm lateral shift per side.  This allows the rider to get their hands narrower or wider without tilting the extensions so much that the shifters touch.
  • They are 400mm long and can be cut to size to suit nearly every rider.
  • They are drilled for rear-exit cable routing.


Recent Trends in aerobar fit have been towards higher hand positions, so we've increased the rise compared to previous generation extensions.  We have focused on the most popular angles from our previous range and added the 50 SLC.
The 50 SLC was developed to deliver both the lightest possible carbon extension and to offer riders of high end bikes the ability to use our Aeroport Di2 adaptor with a carbon extension. Extensive testing was required to achieve this target.

    Who is it for?

    The extensions 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.


    These extensions were designed with the Aeroport in mind, so they can fit a Shimano Di2 EW-RS910 junction box and BT-DN110 battery with room for an EW-SD50 cable to pass through. 

    Tech Specs
    • Extension Length: 400mm
    • Extension Angle: 50 Degrees
    • Outer Diameter: 22.2mm
    • Includes: Sold as a Pair (1 Right and 1 Left Extension)
    • Construction: Carbon
    • Colors: Matte Black
    • Weight: 140g/pair

    SLC Extensions Installation Instructions

      Shipping Information: 

      Your order will be shipping from Long Beach, California.

      We offer quick order processing.  Our goal is to have orders placed before noon Pacific Standard Time on business days (non-holiday Mondays through Fridays) leave that same day. Orders placed after noon (PST) on a business day, or on a weekend, will ship the following business day.

      • Please allow 1-2 business days for order processing and verification, and an additional 2-6 business days for delivery.
      • Profile Design ships most packages via FedEx and USPS, although we may change these at any time.
      • Some packages may require signature upon delivery. This is sometimes at the request of Profile Design and sometimes a Fedex decision, and it is always made in order to protect the consumer from theft.

      Additional Information:

      • We process and deliver orders Monday-Friday (excluding holidays). Saturday and/or Sunday deliveries may be available for some orders.
      • We use a variety of shipping carriers to make sure we deliver your order as soon as possible.
      • If you order multiple items, you may get multiple deliveries. We’ll send you a shipping confirmation email for each shipment, so you’ll know exactly what to expect and when to expect it.
      • Profile Design cannot ship to Postal Boxes (APO, FPO and P.O. Boxes).
      • We do not offer international shipping and are unable to ship to US territories, PO boxes, re-shippers, or package forwarding services.
      • We reserve the right to refuse any sale at any time.


      Web Order Refunds and Exchanges:

      Profile Design will accept returned items from the Profile Design web store for an exchange or refund if the following criteria are met:

      • Any new, un-used, un-mounted and unaltered merchandise may be returned with original packaging up to 30 days from the date of purchase for a refund. A credit will be issued to the original payment for the item(s) amount, less shipping and handling. 
      • If you need a copy of the return form, you can download it here.
      • Return authorization is not necessary, and we do not issue RA#s for consumer returns.
      • Non-Returnable items: Sale Items & Items where the customer indicated their acknowledgement, via checkbox, that the item may have compatibility issues

      How is a refund processed?

      A refund is processed differently than a charge to your account and may take 3-5 days to be posted by your bank after it is processed by our team.

      Refunds are processed to the original form of payment:

      • Credit Card refunds may only be credited to the original credit card. If the original credit card is not an option, a gift card will be provided


      • If you need a different item, color, or size, please place a new order and follow the directions for returning unwanted items for a refund which is outlined above.

      Defective and Incorrect items:

      Return Shipping:

      • Please ship your return with a carrier that provides tracking and insurance. We cannot be responsible for items that do not arrive at our facility.
      • We do not accept C.O.D. deliveries.
      • Please send all returns to:

      Profile Design
      Attn: Online Returns
      2677 E. El Presidio St.
      Long Beach, CA 90810

      Returns enter our system within 48 hours of receipt and will be finalized within four business days after arrival. Email notification is sent upon the finalization of your return, not when your items are received at the facility. Please note that it will take most banks 3-6 business days for the credit to be reflected in your available balance after you receive your email notification.

      For purchase made at an authorized Profile Design dealer:

      • Returns and exchanges will need to be coordinated through the original point of purchase.
      • Product must be returned to place of purchase for evaluation by dealer, dealer's return policy in effect.


       If you have any questions regarding your return:

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