BankRoll X4 outdoor wheels are made for the streets, sidewalks, concrete, and asphalt. These wheels have a durometer of 78A and roll smooth on rougher surfaces. BankRoll X4s are specifically made to be durable, reliable, and smooth on rough surfaces. Currently sold in black only and pictured here with Bankroll Dimes bearings (sold separately). This wheel is 62mm. These wheels are sold in 4 packs.