BikeMaster Heavy-Duty Tire Tubes BikeMaster heavy-duty tire tubes are designed to perform on the track or the trail. Whether you ride hard-pack or sand, the natural rubber compounds ensure durability and performance. With increased wall thickness, these tubes provide better puncture and pinch flat protection to keep you riding. Order the size needed for your wheel applications. SIZE: 110/90-19 PART# BKM374672 The use of the tire and other vehicle data and information accessible through this webpage is limited to persons located in the United States of America and Canada. ALTHOUGH THE DATA IS BELIEVED TO BE ACCURATE, NO WARRANTY OR GUARANTEE IS MADE REGARDING THE QUALITY OR ACCURACY OF THE DATA. All data should be verified by a tire professional, the vehicle placard (typically located on an inside door panel or on frame), and/or the vehicle owners manual.