Replacement Center Post for Mousse Tire ChangerTire changer frame adjusts to fit 18", 19" and 21" wheel sizes; frame legs are engraved with these measurements for quick and accurate adjustmentQuickest and easiest way to relieve tire bead pressure to allow multiple tire irons to be inserted when changing mousse bib foam tubesTire can be pushed off rim using the bead breaker tool after a portion of the tire bead has been removed from the rimIncludes compact heavy-duty storage bag with carry handles for easy transport; bag size is 27" x 10" x 8"Bead breaker tool is also great for breaking beads on offroad tires with inflatable inner tubesUsed to change tires with mousse bib tubes or tires with standard inflatable tubesWheel rests at a comfortable working height