RFX Pro FAST Wheel Spacers Rear (Blue) Yamaha YZF250 450 Collars Flanged x4 Collars Flanged x4 TECNIUM developed a full range of performant pads and shoes for each discipline Constructed from 7075 T6 aluminum with a unique taper design to allow for quicker wheel changes without spacer dropping out Color anodized to increase durability which helps to reduce surface wear and decrease the amount of dirt entering the hub which in turn extends the life of the bearing