This is Pro-Line's Velocity 4.0" Zero offset Wheels for Front or Rear. The Velocity 4.0" Dish wheels are the ultimate in lightweight durability! Pro-Line's team of enthusiasts incorporated the latest in 1:8 bead gluing for increased bonding strength. The bonding surface also has an additional texture detail in the glue channels to keep your tires on your wheels. Made to fit the 17mm hex of today's most popular 1:8 trucks! Accept no imitations on materials used either. The Velocity wheels are molded from the Dupont nylon, the highest standards in nylon material in the market. Pro-Line Velocity wheels are the latest in wheel technology from a company that has over 25 years of mold design, mold making, and product production.