see if they are gsd2 or gsd3 goodyear tyres if its the gsd3 they are sooooo good, but cost loads, gsd2s are very good also, wicked in the wet, when i had em on my 15s i found if u went in to a roundabout or corner quick they tend to skip or bounce a little when they start to loose grip....
gsd3s i had no problem with but they wear stupidly fast i have falkens now, and im really pleased with them, good in wet and dry, dont wear to quick and the sidewall leans in more, so easier for my 17s to fit