BRAND NEW BOB REVOLUTION 16X1.75/2.125 REAR TIRE INNER TUBE SINGLE & DUALLIE STROLLERS 16 x 1.75/2.125" inner tube  Carefully inspected and packaged for optimal longevity COMPONENTS: (1) 16 x 1.75/2.125" inner tube COMPATIBLE WITH: Rear wheels of Bob Revolution single and double strollers (except Revolution CE) Rear wheels of Revolution SE, Revolution Flex (2015 and older), Revolution Strides (2015 and older) All 3 wheels of Bob Sport Utility single and double strollers All 3 wheels of Bob Ironman single and double strollers Kids bicycles Trailers Lawn carts/karts