[Boomer]

I just bought a brand new cub cadet twin cylinder ride on mower.

I've cut the lawns fine but my tires are leaving black tread marks on two of the fancy patios - I am going very slow careful not to turn sharply. What's going on here?

I put more air into the tires think they may be soft but no difference.

How do I remove these marks - customer has already trie to scrub off with soap/water. Suggestions?

Thank you in advance.