The front metz on my Speedmaster started cracking on the sidewalls after 5 months and about 4500 miles (still had plenty of tread). I contacted Metzler and they said to take it to a dealership and have them inspect it and call back. To make it short, I got a free front tire, but I did have to pay for instation.
If it's got good tread and the cracking is bad, contact Avon.
If it's got good tread and the cracking is bad, contact Avon.