I hope you can all help with this. Attached are some pics of my Nitto 555RIIs. I don’t drive the car much and store it over the winter with standard radial tires. I put the Nittos on in the Spring and they looked fine. Taking them off last week you can see it looks like they were cut with a razor blade on the tread and the sidewall. I called Nitto and they said to take them to a Nitto dealer for inspection but honestly I don’t trust anyone trying to sell me something - “yeah, they’re bad, let me sell you some new ones...”
Usually I keep about 30lbs in them but recently I’ve been driving around with 16lbs or so. I guess I should mention that I have been keeping the car in the garage with the lower pressure where it sits from weekend to weekend until I drive it. It did get cold around here for a week or so but I am quite sure it never got below the 15F Nitto cautions against.
Attached there is a pic from the Nitto website showing what the cracking looks like. My tires really don’t look like that, do they?
Finally, someone did tell me that with the low pressure in the tires, and the car resting like that, and with the colder weather we got (maybe to 30F at worst) that the rubber just got “pinched” and cracked. But even so is that a cosmetic thing or a safety thing?
Any input on this is appreciated.
Thank you.
Brad








