TWO 16'' x 1.75/1.95/2.15 Back and ONE 12.5'' x 1.75/2.15 Front Stroller Replacement Tubes: Fit most baby strollers on the market with 16’’ back and 12'' front tires like Bob Revolution (PRO/Flex/SE), Graco FastAction Fold, Graco Click/Go Jogging, Baby trend Expedition, Burley Solstice Jogging Stroller, Joovy Zoom 360 – guaranteed fit! ADDS COMFORT TO YOUR BABY’S RIDE: With thick butyl rubber that absorbs shocks (4X thicker than other brands), your baby won’t feel the bumps and hollows because the stroller will glide along, protecting the loving one from the force. Now that’s comfortable. SAFETY FIRST IS OUR MOTTO: We designed this inner tube to be explosion proof. When and if punctured, it immediately creates an airtight seal to prevent damage, destruction and injury to the rider. Safe in any season or weather condition. MADE HEAVY DUTY FROM QUALITY MATERIALS: Our Inner tubes are made from premium, 100% butyl, BPA and odor free rubbers, It’s our job to make dependable and durable inner tubes and we do it right! Count on CalPalmy! IMPORTANT NOTE: This replacement kit is an aftermarket product produced by CalPalmy (TM). It meets or exceeds the performance of OEM replacements (based on in-house testing). We do not have any affiliation with or endorsement from any of the manufacturers mentioned.