It's the bane of cyclists around the world, but now the
hassle of a puncture could be about to become history.

A bike tyre that never gets a puncture because it is devoid
of air is to go on sale.

The solid tyres, which weigh the same as a normal tyre,
still work after running over nails and shards of glass.

They are made from nanofoam, an ultra-light polymer that
absorbs the piercing and impact of sharp objects, and has
a constant pressure.

London-based company Tannus made the solid tyres for
bikes. The company claims the tyres never get a puncture.

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