**DIFFERENT FORMULAS WITH DIFFERENT PRICES** Spec:Diameter: 64.5mmWidth: 44mmDurometer: 75a(Bubblegum), 80a(Mint), 81a(Clear)Contact Patch: 33mmLip Profile: RoundCore Placement: CentersetWheel Surface: Stone-ground Sold in sets of FOUR wheels The first wheel carefully designed from the inside-out for the rigors of modern Longboard Freestyle and Dance!(Outstanding for technical freeride, too!)• Finely-tuned height and width with beefy, well-radiused edges.• Exceptionally tough and durable – highly-optimized to withstand the extreme impacts of big Longboard Freestyle jumps.• Unusually light for a wheel this size, with mass highly concentrated in the tire for enhanced momentum and angular balance.• Stone-ground running surface for near-instant break-in – consistent grip and easy slides from the get-go!• Poured in the very fastest urethane the skateboard world has ever seen, bar none. Molded around our trimmed EC™ core.• 37mm tall x 37mm wide – the largest and most supportive hub ever seen in a Longboard Freestyle / Dance wheel.• Thick, unbreakable bearing supports!• Improved “halo” hub configuration for more robust mechanical lock inside urethane without compromising tire thickness.• Formed from 85D fiber-reinforced thermoplastic – the toughest hub material in the industry. Available in DEFCON™ ultra-high-rebound formula, in three finely-tuned durometer choicesGuinness WR speed – more tricks per push! • slow, consistent wear • predictable handling• 75A Bubblegum: Plush roll with extra grip. Velvety-smooth even on rough surfaces.• 77A Mango: Fast, smooth, and lively underfoot. An optimal balance of properties for most surface conditions.• 79A Mint: Ideal for smoother surfaces. Very fast roll with friendly slide characteristics. Excellent durability.