I seem to remember that there was a warranty issue with disks on some of the ST series but that was a while ago. The disks on my st2 were warped at about 18000 miles i think it was but i chopped it in against the st4 and never changed them. The ST4 has 14,500 on it and its fine despite some hard use.
Paul.
16-Jun-2003, 23:13 
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