Serfas' Mountain Seatbag is perfect for carrying your spare tube, tire levers, mini-tool and other essentials. It's water resistant to protect your gear and it sports reflective details to enhance your visibility. Plus, it has a taillight mount for safety and a handy internal key pocket. This bag has a convenient expandable bottom for additional capacity, attaching quickly and securely with Velcro straps.
Small: 6 x 2.25 x 3 inches / 6 x 4.25 x 3 inches (regular/expanded)
Medium: 7.25 x 3 x 3 inches / 7.25 x 5 x 3 inches (regular/expanded)