These are hard clay wheels with a super-hard outer ring.  They are designed for rink skating.  The small diameter allows for more manoueverability, tighter turns and spins as well as sliding.
Suggested for advanced roller skaters.
 
Available: Brown and Tangerine
Size: 45mm x 30mm
Hardness: 103A
 
This is a special order item from the USA.  Please allow up to 4 weeks for delivery.