MPC Black Magic

MPC Black Magic Inline Speed Skating Wheels are the apex of MPC's wheel offerings, combining their best hub design and urethane mix. Consistent performance, no matter where you skate. It worth mentioning the world record was set on the Black Magic Wheel, and at a half second per lap faster than the competition. 
MPC's patented MTech® Soft Heart, Hard Body™ Technology
Combines a soft inner ring with a harder outer urethane.
Suitable for both road and indoor track skating.
FIRM when race conditions are rough or slick.
XFIRM when race conditions are hard, smooth and dry.
XXFIRM when you want maximum roll.. Maximum speed.
Straight-Line Speed ; All-Road/Track Surface Efficiency ; Energy Saving Rebound ; Reliable Grip ; M-Tech Optimization
Price is for a set of 8 Wheels
Sizes: 90mm, 100mm, 110mm or 125mm
Type: Speed (Road or Track)
Hardnesses:
83A (FIRM) 
85A (XFIRM) 
87A (XXFIRM)
Specifications
Urethane:
   Resilient inner band provides rebound for good roll on smooth or rough asphalt
   Inner band allows flex on corners for a secure footprint and grip
   High-durometer outer urethane reduces straight-line footprint
   M-Tech optimization
Hub: Spoked Windmill Hub
Sold in set of 8 wheels. (125mm set of 6 wheels)