I have a set of Metzlers with 8K on them.. I would like to replace the rear before I head out to the Hell's canyon motorcycle rally on Thursday.. The only tire that I've found locally is a Dunlop E3 180 40 16... Do you think it would cause any problems? I'm thinking the wrong size tire with new tread is better than very little tread as long as it fits and don't rub.. OE is 180 70 16. I didn't realize it was getting so thin.. It's just now at the wear bars, but this is along long way from home...