A tire wheel comprising a disk and a rim for mounting a pneumatic tire joined to the peripheral edge of the disk. The rim includes a rim body joined to the disk and rim flanges joined to both width direction sides of the rim body. The disk is offset to one side with respect to the width direction center of the rim. The rim body has a rim body portion extending from a join position between the disk and the rim body to a boundary position between the rim body and the rim flange on the other side. The rim body portion consists of three equal sections into which the rim body portion is equally divided along the center axis of rotation of the wheel. The equal section positioned closer to the rim flange on the other side is thinner in average rim thickness.