As you might have guessed, in my line of work (Vehicle Forensics) I look at a lot of tires and many even get blamed for the cause of an accident.
First: When someone asks me as an expert to diagnose tire cracking, I pretty much ALWAYS tell them to replace the tires. Cracking is normally a sign of age and weather, often a combination of both. But this answer is the legal answer. If I told them it is OK to continue to use, I could get sued for offering bad expert advice should there be an accident. Replacing them is the safe answer for someone in my position unless Iím 100% sure the cracks are caused by a sidewall coating that has cracked and has nothing to do with the actual tire.
Second: You also run into the bias problem. No, not tire bias. If you go to a Goodyear dealer and let them examine the tires to get their advice, they most always will do their best to sell you a set of new tires. Their incentive is to sell you new tires. Thatís the bias. So, going back to the Goodyear dealer still wonít give you a correct answer.
How deep is the cracking? Is it just the outer sidewall? Inside sidewall? Tread? Inspect the tires carefully and try and check the depth of the deepest cracking. This is the first step.
Often you can actually repair this minimal cracking problem by using a good silicone spray and massaging it into the tire sidewall. Normally, if the cracking tends to go away, the cracks were superficial / cosmetic and you should be good, but remember, my legal advice was to replace the tires.
2015 Acura TLX w/Advance
ASE Master Tech
CSI Vehicle Forensics
Last edited by Crashmaster; 05-27-2019 at 01:02 PM.