JX2 BMX Race RimSuper-light, "skinny" semi-aero box section alloy rims will ensure the fastest ride for Junior and Mini riders.,Stainless nipple eyelets allow high tension spokes for a stiff wheel that transfers chain drive into forward motion with minimum effort.,Front or Rear (machined CNC sidewall brake surface) specific versions..Recommended Spoke Tension:Front: 80 to 100Kgs.,Rear: 100 to 135Kgs.SpecificationsMaterial Niobium Alloy material with T-10 heat treatment,Drillings 28 or32H,Eyelets Stainless steel,ERD 425mm,Colour Black anodised,Dimensions 20 x 1 1/8" (tyre bead diameter 451mm) - 19mm wide.