Replacement Parts for Trailer Jockey Wheels Quality trailer jockey wheels with the choice of 3 styles and 3 types of wheels in each style.With Standard bolt-on / weld-on fixing clampWith convenient swivel bolt-on/weld-on clamp - allows you to twist and lock jockey wheel to horizontalEasy fit "U" bolt fixing swivel clamp. Also allows you to twist and lock jockey wheel to horizontal150mm (6") dia. rubber and plastic wheel - for basic applications on firm surfaces250mm (10") dia. solid rubber wheels - heavy duty long wearing wheel - easier to manoeuvre250mm (10") dia. pneumatic tyre - much easier to move in sand - disadvantage of possible puncture