Not worth $18. They're only 4.0 inches long (too short to be really useful). If you screw them (hard by hand) into the brake discs and then put the tire and wheel on the hangers, they're difficult to unscrew without pliers because the flat part of the hanger is too close to the rim and a regular sized wrench can do the Almost scratch the rim. tighten tight. They should be 2 inches longer and have at least another 1/2 inch thread. Go ahead and keep looking for the best option.