The park tool fr 8 bmx freewheel remover removes four notch mini freewheels from flip flop bmx hubs with 30 x 1mm threads one inch base to fit end of sr 1 frw 1 adjustable wrench or bench vise park tool fr8c bmx freewheel remover features oversized centre hole and thin wall design allows use without removal of cones and locknuts investment cast and heat treated for strength and durability one inch base fits end of sr 1 frw 1 park tools or simply an adjustable wrench or bench