Patent ID: 8371595

Claim:
A lower part structure in a vehicle body rear part, comprising: a rear suspension frame disposed to a rear side of a fuel tank and in front of a spare tire disposed generally horizontally in a spare tire housing, the rear suspension frame comprising a front frame and a rear frame, both extending in the vehicle width direction, and a reinforcing member extending in the vehicle width direction and located under the rear frame, the reinforcing member comprising a first reinforcing member and second reinforcing members, the second reinforcing members being located on both right and left sides of the first reinforcing member and having higher rigidity than the first reinforcing member, wherein a rear part of the spare tire is caused to jump up under load application from the rear toward the front of the vehicle and the spare tire or the spare tire housing is caused to apply load on the reinforcing member as the spare tire pivots about a pivot point toward a vertical orientation, wherein the lower part structure is configured so that a midpoint of a tire height in a vertical direction at a front part of the spare tire is located so as to overlap a vertical extent of the rear frame, and when the spare tire is moved toward the vehicle front by a load applied from the vehicle rear, the spare tire comes into contact with the rear suspension frame directly or indirectly, and wherein the rear frame is at or near the pivot point for the spare tire.