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Free UK standard shipping on orders over £50
The Profile Design Aerobar Extensions - ASC PRO 43 represent the pinnacle of aerodynamic innovation and ergonomic design for serious triathletes and time trialists. Crafted from one-piece carbon construction, these extensions deliver exceptional stiffness and durability while maintaining a lightweight profile that enhances your bike’s overall efficiency. The sleek, integrated design minimizes drag, helping you slice through the air with greater ease and speed.
Comfort is at the forefront of the ASC PRO 43’s design, featuring 43ø grips and high-sided arm cups inspired by the Race+ shape to ensure a secure and comfortable fit from elbows to wrists. Adjustable reach and width settings via alloy brackets allow you to customize your position precisely, while the consistent padding surface reduces pressure points and maintains contact during long rides. Available in three lengths—325mm, 350mm, and 375mm—these extensions accommodate a variety of rider preferences and body types.
Compatibility is seamless with the A3 and A2 riser systems, and the inclusion of an A2-A3 adaptor broadens fitting options. The base angle of 15ø, adjustable with optional tilt wedges, offers an optimal foundation to fine-tune your aerodynamic posture. The ASC PRO 43 is engineered to combine performance, comfort, and adaptability, making it an essential upgrade for riders focused on maximizing their race day results.
Are the ASC PRO 43 extensions compatible with all Profile Design risers?
The ASC PRO 43 extensions are specifically designed for the A3 and A2 riser systems. With the A2-A3 adaptor, they can be fitted to the A2 system, but compatibility with other risers is not guaranteed.
How do I adjust the fit of these aerobar extensions?
You can adjust both reach and width using the alloy brackets, which feature two positions for each. Additionally, the brackets can be flipped and reversed, and optional tilt wedges allow you to modify the base angle by 10ø or 25ø to customize your riding position perfectly.
Stock Status Instock - Instore - Item Usually shipped or available for shop collection, within 48 hours (Mon-Fri)
Instock - Supplier Warehouse - Item is held in Suppliers Warehouse, Depending on the the supplier transfer time can vary from 24 Hours to 14 Days for item held in European warehouse.
(over festive periods some suppliers shut from 24th Dec-2nd Jan so orders can be delayed through this period.)
Brands held in European website include Trek, Bontrager, Electra, Wahoo, Rapha. For up-to-date transfer times please call customer services on +44 (0)1782 768622
Most out products are shipped by FedEx, providing unprecedented reliability and speed. Lightweight Spares below £25.00 value have a Royal Mail postage option, which is sent via Tracked 48 service. - £2.99
Shipping on all Domestic Orders over £50.00 (excluding bikes and home trainers) for delivery within the UK is completely FREE!
Bike and Home Trainers and oversize Goods £15.00 - FedEx
White Glove Bike Delivery - our white glove option has your bike personally delivered to you by a fully trained Mechanic and Bike fitter - £99.99
(Certain bikes will only have this option such as Cargo Bikes)
To Qualify for FREE Shipping:
In some cases, we may ship items out with another courier, depending on the status and availability of items ordered. (Customers will not be charged more and will be refunded any unused postage cost) If part of an order is cancelled and the total drops below the £50.00 free postage, a postage charge may be taken.
Delivery costs will be clearly stated on the checkout page, though you will need to register (to provide your delivery address) in order to see the delivery costs.
If you have any questions about delivery charges, times or none delivery please do not hesitate to get in touch by email:store@swinnertoncycles.co.uk or by telephone on +44 (0)1782 768622. Handling is normally 48 hours, but at busy periods this may be extended but we will endeavor to process your order within 5 working days. Please bear in mind in some cases orders can take longer to process, please contact us for more details.
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.




