--- product_id: 769080118 title: "Profile Designs Sonic/Ergo/4525a Aerobar, Black, 55mm - 135mm Stack" brand: "profile design" price: "1 zΕ‚" currency: PLN in_stock: false url: https://www.desertcart.pl/products/769080118-profile-designs-sonic-ergo-4525a-aerobar-black-55mm-135mm-stack store_origin: PL region: Poland --- # 400mm extension length 559g lightweight design 1500+ fit configurations Profile Designs Sonic/Ergo/4525a Aerobar, Black, 55mm - 135mm Stack **Brand:** profile design **Price:** 1 zΕ‚ **Availability:** ❌ Out of Stock ## Summary > πŸš΄β€β™‚οΈ Dial in your speed with the most customizable aerobar ever! ## Quick Answers - **What is this?** Profile Designs Sonic/Ergo/4525a Aerobar, Black, 55mm - 135mm Stack by profile design - **How much does it cost?** 1 zΕ‚ with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/769080118-profile-designs-sonic-ergo-4525a-aerobar-black-55mm-135mm-stack) ## Best For - profile design enthusiasts ## Why This Product - Trusted profile design brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Extended Reach:** 400mm long extensions accommodate a wide range of rider sizes. - β€’ **Fine-Tuned Grip:** 7.5mm lateral shift per side for perfect hand positioning. - β€’ **Lightweight & Durable:** Constructed from premium aluminium and carbon fibre weighing just 559 grams. - β€’ **Sleek Cable Management:** Rear cable routing keeps your setup clean and aerodynamic. - β€’ **Unmatched Adjustability:** Over 1500 precise position options for a custom aerodynamic fit. ## Overview The Profile Designs Sonic/Ergo/4525a Aerobar is a cutting-edge clip-on handlebar extension designed for serious cyclists seeking maximum aerodynamic efficiency and comfort. Featuring over 1500 adjustable positions, 400mm long extensions with precise lateral grip shifts, and a lightweight 559g build from aluminium and carbon fibre, it offers unparalleled customization to fit any rider’s needs while maintaining sleek cable routing for a clean setup. ## Description This is the most adjustable clip on bar on the market (and in history) The main purpose of an aerobar is to get the rider into a fast position and despite a fairly minimalist appearance the Sonic/Ergo range offers a comprehensive fit range for exactly this purpose The extension length and rotation can be easily adjusted using the top bolt There are 100 distinct position options achievable just by moving the armrests Combine that with the risers and this bar offers 1500 possible configurations As a clip on bar it is also possible to adjust the extension width and tilt easily It is worth noting that our previous top level clip on aerobar, the J4/F35 (featuring on carbon clip ons), offered 90 possible configurations This increase highlights the significant step forward we have made with our new generation aerobars in allowing riders to precisely adjust their position The Ergo armrest shares the flippable design of the rest of our new generation armrests that means by swapping sides or rotating the armrests, smaller increments of movement are achieved Γ’β€œ making it simple to fine tune a rider position or match the position from their previous aerobar or bike The 4525a extensions have a first section at 45 degree and the grip at 25 degree They also have a 7.5mm lateral shift per side (15mm total) to allow fine tuning of the grip width Extensions are 400mm long to allow a wide range of riders to fit The cable routing is designed to exit from the rear of the extension Armrest Offset: -70mm to -2.5mm in 7.5mm steps Armrest Width: 124mm to 290mm in 18.5mm steps Armrest Stack: 60mm to 70mm in 5mm increments Weight is 559 grams ## Features - Sonic Ergo 45/25a Aerobar - Department name: Unisex; Included components: Handlebars ## Technical Specifications | Specification | Value | |---------------|-------| | Age range | Adult | | Bike type | Mountain Bike | | Color | Black | | Size | One Size | | Height | 7 inches | | Item display length | 23 inches | | Weight | 907 g | | Item display width | 16 inches | | Material type | Aluminium, Carbon Fibre | | Sport | Cycling | | Included components | Handlebars | | Batteries included? | No | | Brand | Profile Design | | Department | Unisex | | Manufacturer | Profile Design | | Item model number | RHSNC451 | | Product Dimensions | 58.42 x 40.64 x 17.78 cm; 589.67 g | | ASIN | B07G167X63 | ## Images ![Profile Designs Sonic/Ergo/4525a Aerobar, Black, 55mm - 135mm Stack - Image 1](https://m.media-amazon.com/images/I/71FjtoMGWiL.jpg) ![Profile Designs Sonic/Ergo/4525a Aerobar, Black, 55mm - 135mm Stack - Image 2](https://m.media-amazon.com/images/I/618iOJa9ggL.jpg) ![Profile Designs Sonic/Ergo/4525a Aerobar, Black, 55mm - 135mm Stack - Image 3](https://m.media-amazon.com/images/I/71PlXlfgZIL.jpg) ![Profile Designs Sonic/Ergo/4525a Aerobar, Black, 55mm - 135mm Stack - Image 4](https://m.media-amazon.com/images/I/61shaQlqOkL.jpg) --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.pl/products/769080118-profile-designs-sonic-ergo-4525a-aerobar-black-55mm-135mm-stack](https://www.desertcart.pl/products/769080118-profile-designs-sonic-ergo-4525a-aerobar-black-55mm-135mm-stack) --- *Product available on Desertcart Poland* *Store origin: PL* *Last updated: 2026-05-29*