Profile Design J4 Bracket Kit Bike Accessories_Cleat Accessories Since its introduction in 2009

Since its introduction in 2009

Simple effective design constructed from high quality materials

a multi-tool of a bike

The padding is made from Fizik’s proprietary Type 2 foam formulation

The result is a wheelset under 1500g in disc brake form with an average depth of 77

Profile Design J4 Bracket Kit Bike Accessories_Cleat Accessories Since its introduction in 2009Profile Design's J4 Bracket Kit lets you fine tune your aero position down to the millimeter. For lightness, strength and aerodynamics, the brackets are made of forged and CNC machined 6061 aluminum and have Marine quality 12. 9 grade bolts that are corrosion resistant and hidden. For easy and fast adjustability, by simply loosening the fixing bolt on each side you can slide your extensions in and out. Meanwhile, the brackets hold the armrests set