Sutong China Tires Resources TU4011 HI-RUN Heavy Duty Lawn and Garden Tube, 23x8.5-12 Tr13 Lawn and garden tube Fits 23x8.50/9.50/10.50-12, 23x9.50-12, 23x10.50-12 and 23x8.50-12 Tr13 valve stem 23x8.5/9.5/10.5-12