RRP is £29 each. They can usually be had for about £25 each with free P&P if you shop around but these are £19 each with P&P for a pair costing just £3.
Ride through broken glass! The new Marathon Plus with SMART GUARD makes it possible thanks to the highly flexible, special rubber layer. The revolutionary feature of this new puncture protection system is its 'super-ball' characteristics. The Smart Guard special rubber protection belt is so flexible that it has no effect on rolling resistance, unlike traditional puncture protection systems which increase a tire's rolling resistance. The approximate 200 gram extra weight compared with the 'classic' Marathon is hardly noticeable in everyday use.
Protects reliably against everyday tire killers: Pointed or sharp objects stand little chance of penetrating the tire. Due to its high elasticity, any sharp object that tries to penetrate Smart Guard is actively pushed back out.
In addition to the tread and carcass thickness, five millimetres of belt brings the total to nearly a centimetre of material. Shards, flints and glass that embed in the tread will not penetrate.
With reflective sidewall