12" x 1.75/2.125 Inner Tube Replacement That Fits Baby Strollers and Kids Bikes: The perfect BOB stroller front tire tube replacement for all BOB Revolution, Alterrain, Stroller Strides and Rambler, RoyalBaby, Schwinn Koen & Elm, Dynacraft, JOYSTAR and COEWSKE. Universal fit for 12" or 12.5" wheels....

12.5 x 2.25 THICKER THAN STANDARD INNER TUBE: Designed in San Diego, CA - We have upgraded our inner tubes from production, making them 3.5x THICKER than the originals. Instead of average 0.8 or 1.2mm, we offer 3.5mm thickness! This has proven to extend the lifecycle of your stroller tires 5x longer...