Steadfast Urethane come in a variety of sizes and colors.
Compounded for durability, and cut down to the most popular
sizes for whatever type of skater you are.

• Street Skaters: The standard and your stable would
  be the Steadfast Urethane "Blanks" and
  "Two-Tones" Series. So fresh and clean. Loads of
  colors to keep your board fly.
  
  
• Park Skaters: Steadfast Urethane "Cores" and
  "Graphics" are the ride you're looking for. A more
  responsive urethane compound is used on
  these series. "Cores" are molded around a PU
  core insert, making the wheels lighter = more air.
  
  
• Cruisers and Rippers: Steadfast Urethane"Biggies"
  Series is SERIOUS!!! Softer urethane and larger
  diameter makes is perfect for boardwalks and pools.
  
  
• Dirt Mongers: Check out the Off road sets. they come
  complete with risers, and hardware to turn any board into
  hill bomber. Larger wheel and bulkier wheel
  for stabilization.