This flat-free tire, equipped with a ball-bearing bushing in the center hub, will replace the tires on all portable Rapid Reel® brand hose reels sold prior to 2006. From 2000 through 2006, we sold portable hose reels with a couple different tread patterns and hub designs. Two of them are pictured in the photo gallery. Most of these 'ball-bearing' tires rode on a 1/2-inch threaded-carriage bolt axle. This black-hub tire will replace all of them. Many of the original tires were pneumatic. This replacement tire is a foam-filled flat-free tire. We no longer sell pneumatic tires.