Bought Schwalbe Marathon Green Guard 622-37 from official Serbian dealer and rode them for 2 months, some 600 kilometers. The rear tyre has cracked along it's thread and shows the green inner protective layer. You could peel the threads off by hand now.

Looking into local, Serbian bike forums, I found out that many people in Serbia have had similar problems with Schwalbes. This seems to be Serbian (distributor) specific problem.

Is there a difference in production quality, or can wrong (or too long) storage ruin tires so that they fail this soon?


Use my bike as the main means of transport and was hoping not to worry about tires for a year at least after purchasing rather expensive Marathons. Distributor is some 100 km away from my town, so even sending tires back and getting new ones is a significant expense. Very angry and disappointed.


P.S. Always inflated to recommended 5.5 bar pressure. Total weight of bike, luggage and myself is under 110 kgs, so one tyre couldn't have been overloaded. 90% road riding.
I was just planing to order studded winter tires as well, but now I'm not trusting and might just go for DIY on some older and a lot cheaper tyres.