Equivalent RO-MA to Durable Crossover

RO-MA Wheels
POLYPROPYLENE ROMAX
POLYURETHANE / POLYPROPYLENE SANI-MAX, SANI-KART
THERMOPLASTIC ELASTOMER / POLYPROPYLENE SANI-SOFT 
POLYURETHANE / ALUMINUM ERGONOMIC, INTER LOCK SYSTEM
POLYURETHANE / ALUMINUM