Riding 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 due to its 'super-ball' characteristics, The Smart Guard special rubber protection belt is so flexible that it has no effect on rolling resistance In fact, whereas traditional puncture protection systems increase a tire's rolling resistance The approximate 200 gram extra weight compared with the 'classic' Marathon is hardly noticeable in everyday use.