Profile Design J4 Bracket Kit Wheel Brand_HED Power is measured in the

Power is measured in the left leg through two sets of opposing gauges in the axle delivering precise data metrics including power output

equipped with Shimano Tourney 8-speed components

mid-blade mounts

accredited four-step certification and testing process to provide ​athletes the highest level of assurance

quick-release axle w/ flat-mount disc tabs

Profile Design J4 Bracket Kit Wheel Brand_HED Power is measured in theProfile 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