7" x 1.5" plastic wheel, 1-3/8" hub length. 1/2" diameter offset hub with nylon bearing. Diamond tread pattern. 50 lb load rating. 7" x 1.5" plastic wheel 1-3/8" hub length 1/2" diameter offset hub with nylon bearing Diamond tread pattern 50 lb load rating. WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov