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A few threads out there but thought I would add my comments for Avon ZX7 Tyres cracking after a couple of years.
So purchased my Avon ZX7 Rear Tyres back in 2021 (July) and just noticed as I was checking the rear brakes that the Avon ZX7 tyre I took off has cracking along the longitudinal rain groove.
So had a look at the rear tyre on the other side of the car and there is much less longitudinal groove cracking which suggests strongly the tyres facing the sun (drivers side) is more damaged than the non sunny side.
Real pain this is and I have to either rotate the rear tyres , or park in the opposite direction as until now I always park my car in the same position.
I never had this problem when I used to run Continentals, but I spend more time at home now working so not doing the miles I used to, so not a fair comparison I suppose
Note: The tyre walls are not cracked and I have shined a torch on the longitudinal groove cracks and cannot see any metal, so I believe the tyres are ok until Xmas at least.
Avon ZX7 Tyre Longitudinal Cracks – Sunny Side
Avon ZX7 Tyre Longitudinal Cracks – Non-Sunny Side
Avon ZX7 Tyre Longitudinal Cracks – Detailed View
In a completely sane world, madness is the only freedom (J.G.Ballard).
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Maybe sun on the outer groove, but there wont get sun to the inner grooves.
I think this is more a constructional problem.
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or it could be a heat issue, with it getting very hot ad then cooling down…
Never had these tyres on any of my cars, I’ve had Bridgestone tyres (wasn’t a fan but too costly to replace them) and I’ve had goodyear, those where pretty good.
Had Pirelli tyres but they always seemed to look like they were low tyre pressures.
Current ones are Michelin and doing ok so far but are only approx. 1.5years old.
Kev
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Had a look online about tyres and cracking and does seem that for most of the tread related cracking these are associated with tyres that have Longitudinal groove channel.
I found very few tread type cracking with all season tyres. but do realise all season tyres are not in common usage, so maybe why reports on cracking on the treads is not reported.
I have used Mitchelins CROSSCLIMATE a few years ago and found they where a tad noisy and I did not like how the tyre grips with lots of water on the road (aquaplaning) which is why I have always opted for summer tyres with good wet grip ratings etc…
In theory, given that the tread patterns on modern all-season tyres and the improved water displacement designs, these type of tyres should not suffer as severely from tread (Longitudinal) type cracking and aquaplaning.
Now just to sort out why tyre walls crack as it does seem when I looked online, big fat tyres and tyres with large (deep) tyre walls did seem to suffer more than low profile tyres and as my car tyres are low profile with reinforced walls, this might help explain why cracks appeared in the Longitudinal tread groove as this is the weakest point.
So my next tyre maybe needs to be an all-season type tyre with a reinforced wall to reduce cracking on both tread and tyre wall, but still need good wet handling characteristics and good road handling and feedback etc.
I am sure this would not be an issue if I was driving 20,000+ miles a year but as I don’t, nice to plan ahead as tyres are expensive.
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In a completely sane world, madness is the only freedom (J.G.Ballard).
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Yes, agree tyres are expensive, for the Bridgestone tyres I had there were around £180-220 (depending on when prices went up and down and I didn’t like the handling of those, at times it felt like the car was not touching the road, very disconcerting when your driving along.
The good year tyres I had on the previous car to above was much better.
The Pirellis I’d had, never seem to last very long before they need changing and I too am not doing very high mileage, they just seem to wear more easily some how. There were cheaper though as were smaller wheels.
On my current car, they are Mitchelin’s and I think are wearing ok so will see how these goes. Wheels not as bit as the goodyear/Bridgestone ones but bit smaller so will see how they fair. Car is due service in Jan so will get the low down on the tyres then and see how they are fairing.
Only good thing so far is I’m under the mileage limit so far and hopefully should still be under it come Jan. Only meant to do 9k a year. Downside is I’m literally only using it for work, not been using it to go anywhere else in but hoping if a good but under in Jan, I can start to use it a bit next year and then later that year comes the decision to either buy it, hand it back or switch to a different car. I’m leaning towards possibly buying it and then trading it in for a used car upto 1 year old with lowish miles on it as bit too costly to take new deal now, want quiet a bit more money each month, just can’t afford to do it or really justify the cost.
Kev
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Both Michelin’s and Goodyear seem to be the better tyres, role on your next or first EV car
In a completely sane world, madness is the only freedom (J.G.Ballard).
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Hybrid does seem to be the sensible approach for most.
In a completely sane world, madness is the only freedom (J.G.Ballard).
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