[demas]

I recently noticed these 'longitudinal' cracks where the tread meets the sidewall.

These pictures are from my F10 with PS4S. Both rear tires, fronts don't seem affected.

Looking to get new tires for the 135 and really want to go with PS4S's on them. Saw in other forums folks having similar issues with these tires - some opinions are that this is common with Michelin.

I absolutely love these tires and have nothing but praise. I ran PSS's previously and also loved them.


- Date code on the first pic is 4520, second one is 1019
- I've started parking outside for about 2 years now - prior to that it was garaged
- No notable issues with performance
- Doesn't get very cold here in winter, we may get down to 3~4 Centigrade for a short period
- I run 3.0 Bar pressure on all fours
- The only dressing I use is Autoglym which I don't think is causing them to dry out
- I'm still on my original PS4S's on the fronts, the rears are my second set. Fronts are date coded mid 2019.
- Interestingly, both fronts are Made in the USA while both rears are Made in France - I wouldn't think compounds/make is different.


Anyone have similar issues with your PS4S?