A spacer for spacing a spare wheel assembly from a vehicle floor of a vehicle compartment is provided. The spacer includes an annular body, an outer flange, and an inner flange. The annular body includes an upper surface for facing toward the spare wheel assembly and a lower surface for facing toward the floor and away from the spare wheel assembly. The annular body further includes a peripheral edge and an inner edge. The outer flange extends from the upper surface and is configured to contact a wheel rim of the spare wheel assembly. The inner flange is offset radially inwardly from the outer flange and extends from the upper surface. The inner flange is configured to contact the wheel rim of the spare wheel assembly offset from where the outer flange is configured to contact the wheel rim.