Don't get stuck with a flat! This 2-pack of Sunlit inner tubes is a smart backup for any mountain biker. They're designed for 26-inch wheels with tire widths ranging from 1.95 to 2.125 inches, which covers a lot of common MTB tires. The valve is Schrader type (the same as car tires) with a 32mm length, making it easy to pump up at most gas stations or with a standard floor pump. Made from durable rubber, these tubes are reliable and ready to roll when you need a quick trailside repair. Keep one in your saddle bag and one at home as a spare. They come brand new in the box, and at this price, it's a no-brainer to have extras on hand. Whether you're hitting the trails, commuting, or just cruising around, being prepared beats walking your bike home. Simple, affordable peace of mind for any cyclist!