The sfr rx xt inline skates previously known as rx 23 are perfect for fitness and recreation the lightweight aluminium chassis reduces weight and friction making it easier to build up speed while the heel shock absorber provides a smoother ridesemi soft sports styled upperheel shock absorberlow cut cuff liningair vents in the sole and upper 360degree coolingcnc 2pc aluminium chassisultra lightweight designabec 5 chrome bearingspure rubber stopper82a shr wheelswheel sizes78 x 24mm for si