The schwalbe marathon 16 reflective tyre 35 349 is one of three types of of tyre fitted as standard on brompton folding bikes this tyre is made with high quality material and uses a greenguard technology which is the insert of highly flexible 3mm thick natural rubber offering a great puncture protection these folding bike tyres are slightly heavier than the standard brompton bike tyre however they are solidly built and use a greenguard puncture protection and a thicker sidewall making the ty