The Surly Plus Fat Bike Tube is a high-quality inner tube designed for 26-inch fat bikes with a 3.0-4.8" width. Made from durable butyl rubber, this tube is built to withstand the rigors of fat biking and provide a secure fit for your tire. With a Presta valve for easy inflation, this tube is a reliable choice for riders looking for a dependable and durable component for their cycling adventures.