Quality rubber. Despite the recent snowfall, we still need to remember that riding in the winter is different than riding in the summer. Considerably less than in our forests near Hong Kong, especially when one considers that they still manage to clean it. The benefits: I rode on porridge, snow, ice, dug parking places, and didn't even notice the garbage on the roadways. Despite this, you haven't gotten stuck anyplace yet, so eating porridge has its advantages and disadvantages.