Flat-free tyre (FFT) Priced per pair.

A 16-inch pressed-steel wheel fitted with a flat-free (puncture-proof) tyre, complete with two wheel bearings.  An instant replacement for the wheel with pneumatic tyre previously fitted as standard to a Smart Cart.  Simply remove the pin from the end of the axle, slide the old wheel off and the new wheel on. 

This is a tyre made of foam rubber which looks like and behaves like a standard pneumatic tyre except that it cannot puncture.  Think of it as a solid rubber tyre made from slightly squidgy rubber, permanently fitted to the steel rim.  Priced per pair