Most of us here won't shed weight and sacrifice performance in the process. At 170g, the 26 x 1.9-2.125 the WTB Lightweight Presta Tube is both durable and lightweight. Whether you run tubeless or not, you don't want to get stuck without one in your backpack or seatbag. The 26 x 2.2-2.5 gains a few grams, but is still the tube of choice, tipping our scales at 240g. Choose the size that best fits your needs.