I can't wait to get of them. They are loud and not every efficient. OEM were 235 wh/mi at 10k, and these are 289 wh/mi. That's a 18.6% decrease in range.
Hmm. Perhaps it is because the OEMs were so awful, but I think the CrossClimate+ is a very significant improvement over the MXMs my M3 came with.
I've put over 7,000 miles on these tires since October and I did notice a significant reduction in efficiency early on. However, with the warm weather and after several thousand miles on the them, I'm seeing around 250 Wh/mi with the CrossClimate+, which is similar to what I got with the OEMs. I made a note of my lifetime average at around 20,000 miles when the tires were swapped. At that time it was 246 Wh/mi. Today, after 7,000 additional miles, my car shows 252 Wh/mi.
Winter performance is where these tires excel. While not up to the performance of a dedicated winter tire, these tires met all my needs during what was a relatively mild Maine winter.
Yes, the tires are loud, as were the OEMs. IMHO tire noise, wind noise, fan noise from life support, noise from bearings (yes, I hear those wheel bearings) as well as from other sources are all much more noticeable in an EV due to the absence of a conventional drive train. To me, noise produced by the CrossClimate+ is comparable to any other premium tire.
My one complaint IRT these tires is that they are no longer made and have been superseded by the CrossClimate2. In March, one of my tires had to be replaced due to to a sidewall puncture. My local shop was able to source a replacement, but that will change before long. I contacted Michelin to ask if the newer "2" would be compatible with the "+". I received a "yes, but" reply which said in essence "We recommend that all four tires be identical. However, if you do mix them, purchase two replacement tires and mount them in back".
So, do I plan to replace these tires with the CrossClimate2 when the time comes? Probably not. I live in rural Maine. If I were located in a more temperate locale with occasional moderate snow storms, these tires would be an ideal solution. It was an interesting experiment. My other car has dedicated winter tires to deal with our severe winters, so the CrossClimates will stay on our M3 until it is time to replace them (which probably won't be long--these tires seem to be wearing at the same rate at the OEMs), this time with two sets of tires and wheels optimized for either winter or summer.