Reason for Firm, XFrim, XXFirm:
The core and tire configuration make it impossible to follow the traditional durometer ‘A’ scale for wheel hardness. With only 4mm of tire in the center and 6.5 on the edges -traditional hardness rating doesn’t apply.
Unique Core by Design:
TKO one piece core is stout in structure with wall thickness that promotes stiffness. Couple the structure design with our composite (Derlin) injected compounds and you have a plastic that performs like alloy but lighter.
Outer Mold (overall profile)
TKO profile is the ONLY 59x38mm with a speed lip. No other 59 mm derby wheel has a lip like TKO. The first 59×38 mm wheel with stability and control of a 62×44 mm. You will simply be amazed!!