The invention relates to a rim base (15) that has an integrated flange (14) and is made of fiber composite as well as to a method for the production thereof. According to the invention, the flange is formed by inward-oriented protuberances of layers of fibers (9a) of the rim base, said layers of fibers extending without interruption from the rim base to the flange. The rim base is produced by placing fiber material on a mold (4) which corresponds to the contour of the rim base and which includes a radially continuous or segmented groove (10a). The fibers are placed such that the fibers of at least one layer of fibers have protuberances that point into the groove. Preferably, a multipart mold is used which allows the width of the groove to be reduced and thus the protuberances to be shaped.