Rollerblade New Jack 4 Aggressive Skates - The Rollerblade New Jack 4 Aggressive Skates are your go-to, jack-of-all-trades skate. Whether you spend your days in the park or shred up the street, these skates will work for you. They are durable and versatile boasting all the features you need to ensure that you can slay with the best. Many of the components are removable so when you abuse these to no end and need to change some pieces out then you can. The cuff buckle, cuff, grind inserts and frames can all be taken away. The Specialized Liner has a PU Foam shock absorber and double padded tongue so that you are well-protected and comfortable all day. The standard lace closure, 45 degree Velcro Band and removable buckle keep you securely inside while maintaining a custom fit. Offering good flex for grinds and made for the intermediate, the Rollerblade New Jack 4 Aggressive Skates have great function and high-performance for the serious skater. . Tongue: Double Padded, Skate Type: Aggressive, Special Features: Shock Absorber Heel Insert, Wheel Configuration: 60mm-AntiRocker-AntiRocker-60mm, Wheel Durometer: 90A, Bearing Type: SG 7, Maximum Wheel Size: 60mm, Outsole Material: Not Specified, Exterior Material: TRS Shell, Bearing Grade: Performance, Maximum Wheel Size: , Wheel Size: Under 70mm, Liner Type: Specialized Liner, Anti-Rocker: Yes, Shock Absorber Type: Polyurethane Foam, Frame Type: Blank with 8mm Axles and Aluminum Frame Spacers, Skate Frame Material: Performance Composite, Skate Closure System: Traditional Laces, Skate Cuff Height: High, Skill Range: Advanced Intermediate - Expert, Model Year: 2013, Product ID: 303542, Model Number: 07321400 744 230, GTIN: 0885315478917