The Sonar Zen provides you with good performance in the most affordable outdoor skate wheel. Sold in packs of four wheels. To order a full set of wheels, be sure to set your quantity to two.
Sonar Zen Features: 
Category: Outdoor Recreation
Skating Style: Outdoor, Trail Skating
Size: 32 mm x 62 mm
Hardness: 85A 
Hub: None
Urethane/Color: Black, Blue, Green, Magenta, Orange, Pink, Red, and Yellow
Sold in packs of four wheels