On the off chance our standard 6 Rear Wheel Strap cup (provided with the Talon, Mini Bomber or Bomber) doesnt fit the space available on your car, we offer a more compact version with a smaller 4.5 SeaSucker vacuum pad. The Compact Rear Wheel Strap does NOT have the cupped rear wheel housing that comes standard with the regular Rear Wheel Strap. The strap is 22 inches and will fit most fat bike tires.