As an aside – I always wondered if one should be majorly concerned about some sidewall cracking, since tires have several belts of steel and polyester on the sidewalls. After all it’s the belting sandwiched between the rubber that gives all the strength isn’t it? So if some cracks appear on the sidewalls even if near the beads – you still have those belts under the rubber - plus the wire inside the tire beads.
Is not the rubber bonded to the belting on the sidewalls?
I have really never seen this discussion anywhere relating sidewall cracking to the sidewall belts...all I read is OH better run out and replace tires right away if there are cracks in the sidewalls!
