Quite a tough question you have there. I can only say looking at their performances.

XM2+ and Primacy 4st are both wet braking focus tire line with different wear targets. XM2+ has a much higher wear requirement than Primacy 4st being the comfort segment. The wet braking vs wear conflict is the biggest here from a compound point of view as the Asia market do not really care about rolling resistance. This is a very general overview without going into deeper context.

I would not worry too much about cracking which happens on the surface and does not propagate down to the core. These are mostly because of the high amount of silica they are using to achieve a high wet braking level.

Hi, may I know is it still safe to use tyres like this ? DOT2018 with good tread depth.

What is the reason for these cracks? Is it because they are seldom used? Since covid mileage about 6k per annum.

I would not worry too much about cracking which happens on the surface and does not propagate down to the core. These are mostly because of the high amount of silica they are using to achieve a high wet braking level.

Sorry I don't know much about tyres that's why I came here.

Its runflat S001 & I asked the car salesman & he said that I should change it & I also asked my regular tyre shop HupSoon in Subang who has been servicing me for more than 10years & he told me better change it. I also asked Hin Leong which I get my tyres from also recommended me to change for long distance driving. I'm a fast driver sometimes up to 180km/hr on long distance.

I'm thinking maybe the cracks are due to not being driven often since the pandemic & still usable. So I came here to get some opinions.

But now that I have a screw puncture about 1cm patched a month ago leaking, what is your opinion?

Thanks.

I wrote an article about this here sometime ago.

Basically higher inch the higher profit margin it is. This is also a way to support the cheap low inch prices 😜. Same analogy like business class tickets supporting cheap economy ticket price.