CARLISLE 323800 TIRE TUBE 15 X 6.00 STRAIGHT STEM TR13 RIM SIZE 6 This Carlisle 323800 Tire Tube 15 x 6.00 Straight Stem TR13 Rim Size 6 is made with the best air retention standards. Designed for Lawn Mowers, Garden Tractors and other farm equipment these tubes have high dimensional stability and support heavy loads. Using the correct tube size is important to preserve tire tread life and reduce equipment downtime.