Sonic ergo 4545a

      319 Reviews

      The aerodynamically optimized Sonic/Ergo 4525a minimizes frontal area, significantly reducing drag. Despite its sleek design, it offers a broad fit range, ideal for achieving the fastest, most comfortable riding position.

      UNRIVALED ADJUSTABILITY 

      Over 100 distinct armrest positions and 1500 possible configurations with risers.

      ENHANCES YOUR SPEED AND EFFICIENCY ON THE ROAD

      Ergonomic Armrest for superior comfort

      STURDY AND Ultra-Light Build at Just 559 Grams Total

      Versatile Extension Options

      Today Only - Save 10% at Checkout. Use Code: SPECIAL10

      Save 10%

      $197.90

      $219.90

      100% Money Back Guarantee
      Free standard shipping on all aerobars 

      Order Soon only 14 Left

      Shop Our Other Aerobars

      A multi-sport icon with simple, fine-tune flexibility that makes them the gold standard for bike fitters worldwide.

      Shop Aerobars

      Hypersonic Ergo 50a
      $259.00

      Why Sonic Ergo 4525a is Your Ultimate Riding Companion

      Tailored Fit for Every Cyclist

      Maximize your performance with the Sonic Ergo 4525a's industry-leading 1500 configurations. Precision-tuned armrests and risers adapt to your unique style, ensuring peak comfort and optimal aerodynamics throughout your ride. 

      Slice Through the Air

      The Sonic Ergo 4525a is engineered to reduce aerodynamic drag effectively. This means cyclists can achieve higher speeds with less effort, making this aerobar an ideal choice for both time-trialists and triathletes looking to shave seconds off their times.

      Ergonomic Comfort

       Long rides demand comfort, and the Ergo armrest is a game-changer. Its supportive curve design is not just about improving fit range; it's about cradling the rider's arms to reduce pressure points, minimize fatigue, and allow for sustained performance over extended periods. 

      US

      PROFILE DESIGN

      THEM


      MAXIMUM ADJUSTABILITY

      ERGONOMIC ARMREST WITH SUPPORTIVE CURVE
      OPTIMIZED AERODYNAMIC EFFICIENCY 

      Dual-angle with lateral shift EXTENSION OPTION

      559 GRAM WEIGHT

      INSTALL OUR AEROBARS IN UNDER 10 MINUTES

      SONIC ERGO 4525A SPECS

      BRACKET

       Sonic

      CLAMP DIAMETER

      31.8mm (26.0 w/Shims)

      ARMREST

      Ergo / 10mm Pads

      ARMREST WIDTH

      124mm to 290mm in 18.5mm steps (with Extensions at 100mm)

      ARMREST OFFSET

      -70mm to -2.5mm in 7.5mm steps

      ARMREST STACK

      The minimum is 60mm and the bracket is compatible with our existing risers which add up to 130mm stack with (70mm of spacers added)

      COLOUR 

      MATTE BLACK

      WEIGHT 
      559 GRAMS
      TORQUE SETTINGS (ALL BOLTS ARE M6)
      BAR CLAMP

      6NM

      EXTENSION CLAMP
      6NM

      ARMREST BOLTS

      4.7NM  

      WEIGHT
      BRACKET

      234 GRAMS

      ARMREST
      130 GRAMS

      EXTENSIONS

      195 GRAMS 

      TOTAL

      559 GRAMS  

      Why CYCLISTS love profile design

      4.8/5 rating

      • A quality aero bar, very adjustable

        I originally bought a cheap set of Chinese made carbon fiber aero bars. They actually looked good and weighed nothing. But..... the bars were too short, they had no adjustment, the mounting bracket looked flimsy, the arm pads were thin and uncomfortable, etc, etc. So, I looked for a better set. I didn't want to spend a lot money so I did some research and bought these. I'm glad that I did!

        Randall P.

        Verified Buyer

      •  You can't go wrong

        Comfortable. Easy to install. A whole different effort on the bike. You'll love those.

        MR G.

        Verified Buyer

      • Great TT substitute

        I've done 4 olympic triathlons, a half ironman, and 6 or so century rides with these bars on my specialized road bike. I don't feel any sort of disadvantage against TT cyclists, I'm able to get in aero position very easily with the bars. I can customize the position if I want a higher position or a tighter hold. Can hand tighten with an allen set, and comes off quickly/easily for any drafting races.

        NOLAN P.

        Verified Buyer

      • Adjustable and Comfortable

        I was looking for a clip-on aero bar solution that provided for adjustability, as well as comfort for both short and long-course triathlon. These bars delivered and are very comfortable on short and long rides. The ability to alter your setup both in reach, height, and arm pad location make these a no-brainer for anyone looking for a clip-on solution for racing, training, or just a more comfortable commute!

        kent g.

        Verified Buyer

      • Reliable

        Pads are comfortable and stay securely in place. The bars are sturdy and reliable. They can be turned onwards/outwards, length fairly adjustable. I wouldn't recommend for very tall people/long arms. I'm 5'7". Read the length. Great product. Mine was missing the pads in error, but I emailed them. They responded quickly and got the pads a couple of days later. Very happy

        CAROLINA A.

        Verified Buyer

      • Great improvement

        I really like the latest generation of these. There isn’t a real weight difference between carbon and alloy for the money. I love that the poles have a inward bend, I like to have my hands get really close in the middle.

        J Z.

        Verified Buyer

      Frequently asked questions

      Follow Us

      @PROFILEDESIGN_OCEANIA