The Metron 81 is Vision’s Aero Time Trial focused wheelset. Vision’s complete wheel system has a 24mm rim width, direct pull bladed spokes, ceramic bearings in P.R.A. hubs, ABS brass nipples, 2 to 1 lacing, CFD / wind tunnel proven aerodynamics, and 100+ pro-podiums over the last few seasons. These wheels are living proof that Vision wheels are among the best in the business. Look no further, you’re new Clincher or Tubular wheelset is waiting.