Extension for 31.8mm handlebars (road standard)

$186.06 Excl. tax

~~$228.50~~ MSRP

-18%

Recommended supplier selling price in 2025

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PROFILE DESIGN SuperSonic ergo 50c extension

The Supersonic mount (formerly known as the J5) is the first model in the new generation of Profile Design mounts. It offers easier adjustments and a greater adjustment range than anything before it.

Details

Support: supersonic
Diameter: 31.8 mm (26.0 with shims)
Armrest: Ergo / 10 mm pads
Armrest Width: 124mm to 290mm in 18.5mm increments (with extensions to 100mm)
Armrest Offset: -85mm to -17.5mm in 7.5mm increments
Arm Stack: Minimum is 58.5mm and bracket is compatible with our existing risers which add up to 138.5mm stack with (70mm of spacers added)
Extension Shape: 50c extensions offer a 50 degree bend shape with a 7.5mm side offset (per side). This allows for a neutral wrist angle with the ability to fine tune the grip width. They are 400mm long and can be cut to fit almost any rider. They are drilled for rear exit cable routing.
Total: 679g