BIGGER IS BETTER: Larger 8″ diameter and wider 1.5″ rubber tread are designed for superior performance on a wider range of surfaces including concrete, grass, tile, carpet, hardwood, asphalt and more. USE WITH ANY WALKER: Easily convert any standard folding walker into a smooth rolling walker with these Top Glides universal walker wheels and ski glides. These universal wheels and glides are compatible with any standard walker model for an easy, hassle-free upgrade. RUBBER SPORT WHEELS: Large 8-inch sport wheels easily navigate over uneven surfaces. Smoothly rolling over carpet, pavement or grass, the non-swivel rubber sport wheels are also non-marking for safe indoor use on tile and hardwood floors. DURABLE UNIVERSAL GLIDES: Allowing for smooth, easy mobility, the free universal FlexFit walker ski glides are designed to easily attach to most walker styles. The curved ski glides slide into place and easily adjust to fit securely in any walker leg. Navigate over carpet, tile, pavement or concrete without dragging your walker or using unsightly tennis balls. QUICK EASY ADJUSTMENTS: Easily install replacement wheels and ski glides on any folding or standard walker without special tools. The leg height can also be adjusted for a hassle-free, customized fit. Note: 8″ wheels limit adjustments for lower height settings.