After a track day at Spa last year my rear tyres ended up like this. I assume that I overheated them & ribbons of tread have come off though there's plenty of tread left. From Spa I went to the 'ring but only did one lap. The next day I left for home. I did probably 1000 miles on the tyres with no issues before swapping over to winter tyres. Should I replace these tyres before putting my summer wheels back on. I have a track day at the beginning of March. Would these tyres be ok?