SKU: 31784642408

Profile Design - Sonic Ergo 39a

Sale price$52.92 Regular price$58.80
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Ships within 48 hours · Estimated delivery Sep 8 - Sep 13

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Description

Profile Design - Sonic Ergo 39aPROFILE DESIGN SONIC ERGO 39A REPLACES THE 35a & 43a The Sonic bracket offers an extensive fit range, low weight and easy adjustment along with minimal frontal area. Combining this with the Ergo armrest creates an aerobar that will aid most riders in optimising their position for both speed and comfort. The 39A is one of the newest versions of our reliable aluminium extension range. Performance The Sonic Ergo is designed to present minimal frontal

PROFILE DESIGN - SONIC ERGO 39A

 

REPLACES THE 35a & 43a

The Sonic bracket offers an extensive fit range, low weight and easy adjustment along with minimal frontal area. Combining this with the Ergo armrest creates an aerobar that will aid most riders in optimising their position for both speed and comfort.

The 39A is one of the newest versions of our reliable aluminium extension range.

Performance

The Sonic/Ergo is designed to present minimal frontal area to create as little aerodynamic drag as possible. The main purpose of an aerobar is, of course, to get the rider into a fast position despite a fairly minimalist appearance the Sonic/Ergo offers a comprehensive fit range for exactly this purpose.

Fit Data

The 39a extensions have a 39° for the grip . The rider can choose whether to hold high for the shrugged position or low for a more open, head up position.

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. This is the most adjustable clip on bar on the market (and in history).

  • Armrest Offset: -70mm to -17.5mm in 7.5mm steps
  • Armrest Width: 124mm to 290mm in 18.5mm steps (With Extensions at 100mm)
  • Armrest Stack:  60mm (no riser kit) to 130mm in 5mm increments (With aftermarket Riser Kit)

Tech 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 -17.5mm 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)
  • Construction: 6061-T6 aluminum, pre-drilled for bar-end shifter cable routing
  • Extension Length: 400mm
  • Extension Angle: 39 Degrees
  • Extension Rise: 87mm (bottom to top)
  • Extension Offset: 15mm total
  • Outer Diameter: 22.2mm
  • Inner Diameter: 19.2mm
  • Shifter Compatibility: Electronic or Mechanical
  • Weight: 564g
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 31784642408

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4.2 ★★★★★
Based on 20 reviews
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Verified Purchase
Glowing Woman2
Bozeman, US
★★★★★ 4
Floss leaves mouth super clean!
I’ve been really irritated by tooth paste co’s dental floss products either being too small/not lasting very long or too waxy/sticky, too minty so I searched for better dental floss and found it with BURST CHARCOAL FLOSS! The floss is black/coated by charcoal and has a smooth non sticky feel to it with a nice subtle mint flavor. Putting the bobbin in the refillable container (another plus reusing container) was slightly tricky because it doesn’t pop off easily and instructions were somewhat vague. After watching a Burst video on YouTube, you turn the container upside down & squeeze the edges w/ tabs & it pops off. The bobbin that came with the kit looks smaller than the pix, we’ll see how long it last. Actual flossing was great, the floss really flattens or expands as it’s pulled between teeth. The floss being black shows and cleans even more gunk from between teeth/gums leaving mouth fresh and super clean. It’s exactly what I was looking for, I highly recommend this product. Only drawback is the smallish size of initial bobbin, took one off star but that can be remedied by Burst co, should more ppl agree & comment. Happy flossing!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 26, 2021
D
Verified Purchase
D H
Dallas, US
★★★★★ 5
I love this case. It’s functional and very pretty.
I found out that the dental floss I’d been using for years is coated in PFAS and other forever chemicals, so I switched to brand that didn’t have any of that. The obvious upside is that I don’t have to worry about those chemicals anymore and get great expanding floss, but the floss comes in a paper case. That case is functional, but I floss and brush a few times a day so I knew that I wanted something that was more durable. I saw this case and fell in love when I saw it and after a couple months of using it, I’m still in love with it. It’s easy to refill, durable and so pretty. Overall just frustration free. It adds a special touch to my flossing routine and elevates that experience for me. The floss that comes with it is great too. It was my first time using charcoal floss and I liked it. I kind of wish they offered the case in a variety of colors as a standalone item, so I can chose my own floss (or a mix to try out the different flavors), but that’s not a big deal and for take away from anything.
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Reviewed in the United States on January 13, 2024
A
Verified Purchase
Amazon Customer
Alexandria, US
★★★★★ 5
A better floss
The wife loves this. It does remove more plaque than other floss. Its woven so it appears to grab more gunk and plaque. It is also thicker so it fits tighter between the teeth. Good product and worth the $. Would recommend.
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Reviewed in the United States on August 3, 2025
K
Verified Purchase
Kelsen
Boise, US
★★★★★ 3
Floss itself is great, dispensing unit is a pain
I like the floss, as it’s relatively thick and has a tacky feel that I assume helps remove material on the tooth. But man, did they over engineer their floss dispenser. Have to simultaneously pinch two small recessed levers to pop open the case which is nigh impossible if you bite your nails. Then have to remove an inside cover, then thread floss, then carefully snap it all back. It’s so intricate that you have to download a PDF via QRG to understand it. Compare to Dr Tungs floss where the dispenser is cardboard and you’re good to go after folding one flap. Continued use will depend on whether my wife can use her nails to operate the dispenser unit to refill.
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Reviewed in the United States on May 25, 2024
E
Verified Purchase
Efren
Pawtucket, US
★★★★★ 5
It’s gentle on my gums
My favorite have been using this for years. Highly recommend. The experience is amazing
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 13, 2026

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