These are what I've used on the E21 for rain tires on the track and autocross. They've seen about 5 wet track sessions and I think 4 autocrosses. Date codes are 2016 and 2017 but they've always been stored inside above freezing. Likely have a lot of life left in them. I think 320 treadware.
Not interested in shipping. Just pay me what you will and take them away.
Cleveland, OH