BJs coupon book has a coupon for $70 off for 4 Michelin Tires.
There is also a coupon for $30 off on installation of a set of 4 Michelin Tires.
The fine print says "May not be combined with other BJ's coupons". But both coupons also say "Coupon supported by manufacturer funding", so it may be possible to apply both at the same time. I will find out tomorrow and post here if it works.
Of course, this is not as slick as the Costco coupons from the past few months but if you need tires now, I think these are not bad.