---
product_id: 709635060
title: "Profile Design Sonic/Ergo/4525a Aerobar, Black, 55mm - 135mm Stack"
brand: "profile design"
price: "AR$15809"
currency: ARS
in_stock: false
reviews_count: 8
url: https://www.desertcart.com.ar/products/709635060-profile-design-sonic-ergo-4525a-aerobar-black-55mm-135mm-stack
store_origin: AR
region: Argentina
---

# Width: 124mm-290mm Adjustable in 18.5mm steps Weight: 559g Profile Design Sonic/Ergo/4525a Aerobar, Black, 55mm - 135mm Stack

**Brand:** profile design
**Price:** AR$15809
**Availability:** ❌ Out of Stock

## Summary

> 🚴‍♂️ Ride Like the Wind with Sonic Precision!

## Quick Answers

- **What is this?** Profile Design Sonic/Ergo/4525a Aerobar, Black, 55mm - 135mm Stack by profile design
- **How much does it cost?** AR$15809 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.com.ar](https://www.desertcart.com.ar/products/709635060-profile-design-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

- • **Precision Fit:** Customizable width from 124mm to 290mm for the perfect fit.
- • **Sleek Aesthetics:** Matte black finish that complements any bike setup.
- • **Elevate Your Ride:** Experience unmatched aerodynamics with the Sonic/Ergo design.
- • **Comfort Meets Control:** Ergo armrests with 10mm pads for ultimate comfort during long rides.
- • **Lightweight Performance:** Weighing in at just 559g, it won't weigh you down.

## Overview

The Profile Design Sonic/Ergo/4525a Aerobar is a high-performance aerobar designed for serious cyclists. Weighing only 559g, it features an adjustable width from 124mm to 290mm in 18.5mm increments, ensuring a perfect fit for every rider. The ergonomic armrests with 10mm pads provide comfort for long rides, all wrapped in a sleek matte black finish.

## Description

With the Sonic/Ergo/4525a, Profile Design takes another giant leap forward with aerobar fit range and increased rider comfort. The 400mm long 4525a extensions have an initial section at a 45 degree angle, while the grip portion of the extension is angled at 25 degrees. The extensions additionally have a 7. 5mm lateral shift per side, allowing finer tuning of the grip width. Ergo armrests and pads complete the package, offering both a huge upgrade in fit range as well as increased rider comfort with a supportive cup to the arms. Risers not included.

## Features

- Profile Design's replacement for the popular T3+ AL aerobar!
- Bracket: Sonic
- Bracket: Sonic Armrest: Ergo/10mm pads
- Width: 124mm to 290mm in 18. 5mm steps
- Weight: 559g Color: Matte black

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Profile Design |
| Brand | Profile Design |
| Model | Sonic/Ergo/4525a Aerobar |
| Item Weight | 1.3 pounds |
| Product Dimensions | 23 x 16 x 7 inches |
| Item model number | RHSNC451 |
| Is Discontinued By Manufacturer | No |
| Manufacturer Part Number | RHSNC451 |

## Images

![Profile Design Sonic/Ergo/4525a Aerobar, Black, 55mm - 135mm Stack - Image 1](https://m.media-amazon.com/images/I/71FjtoMGWiL.jpg)
![Profile Design Sonic/Ergo/4525a Aerobar, Black, 55mm - 135mm Stack - Image 2](https://m.media-amazon.com/images/I/618iOJa9ggL.jpg)
![Profile Design Sonic/Ergo/4525a Aerobar, Black, 55mm - 135mm Stack - Image 3](https://m.media-amazon.com/images/I/71PlXlfgZIL.jpg)
![Profile Design Sonic/Ergo/4525a Aerobar, Black, 55mm - 135mm Stack - Image 4](https://m.media-amazon.com/images/I/61shaQlqOkL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Best part is these are $96 on amazon and $159 everywhere else...
*by G***V on July 28, 2019*

Great aero bars for tall riders. I put these on my trek road bike. It takes some adjusting not only of the bars themselves but also your seat hight and forward position. I am not 100% dialed in yet but I feel confident I will get them set up on the next couple rides. I’m 6’1” and these fit me right on with adjusting the actual bars. These are 400mil long, make sure that you elbows sit in the cradles and not you forearms.To test them out I went for 51mile ride! The first time I got into position I immediately felt that I had less control and I was wobbly. That said, once I rode further I got used to the difference in control. Once you get used to riding in these they are incredibly comfortable. No more numb hands and fingers. I will recommend that at first you ride these on quit streets and get back on the bars through sharper turns and intersections.I also purchased a computer mount for these from my local bike shop. I was not able to find it online.

### ⭐⭐⭐⭐⭐ Great TT substitute
*by N***E on October 23, 2023*

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.

### ⭐⭐⭐⭐⭐ Adjustable and Comfortable
*by K***W on April 21, 2023*

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!

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**Shop now:** [https://www.desertcart.com.ar/products/709635060-profile-design-sonic-ergo-4525a-aerobar-black-55mm-135mm-stack](https://www.desertcart.com.ar/products/709635060-profile-design-sonic-ergo-4525a-aerobar-black-55mm-135mm-stack)

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*Product available on Desertcart Argentina*
*Store origin: AR*
*Last updated: 2026-02-15*