50 Caliber Racing - 5 x 4.5 (5 x 114.3 metric) Wheel Spacer Are your tires rubbing? Need a little bit of clearance? 50 Caliber Racing precision CNC milled wheel spacers are what you need to complete your custom wheel install safely. Gain clearance for larger, wider tires Prevent disc brake calipers rubbing inside your custom wheels Widen the stance of your vehicle for greater stability Install high offset aftermarket wheels.