Michelin Tire Cracking

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Tire

Michelin’s 'Ozone or Weather Cracking Visual Tool' chart is useful to determine if tire cracking is cosmetic (non-warrantable), or severe (warrantable). Compare your tires to Michelin's tire sidewall cracking chart. (As an Amazon Associate, I earn from qualifying purchases). Tire safety is extremely important. This video shows how to check for dry rot even if the tire appears to have plenty of useable tread left.

Michelin Tire Cracking Guide

This is why tires that are stored in a garage can still get tire cracks: electric motors can create ozone that degrades the rubber in tires. This type of tire sidewall cracking is sometimes called ozone cracking or weathering. As a tire continues to degrade and dry out, dry rot can occur. Chemicals can also cause cracked tires.

Michelin Tire Cracking Chart

Michelin
Michelin Tire Cracking
It’s been only a week since CorvetteForum.com member sdtoothdoc uploaded photographs of his 2015 Corvette Z06 wearing cracked tires all-round. Following this rather disappointing state of the Michelin Pilot Super Sport ZP / SC2 tires, a Michelin official cleared the matter up for CorvetteForum.
In the original forum thread, sdtoothdoc says that “my A8 Z finally got here in San Diego and took her home a few miles away. As suspected, all 4 tires have cracks like Dennis's from Las Vegas. When at the dealer, they said that 4 other Stingrays all have the same cracks in the tires. Car looks amazing otherwise!” What can we learn from this? It’s not an isolated case...
Considering that a new set of high-performance Michelin rubber costs more than $2,000, both C7 Corvette owners and enthusiasts wondered if dealers will replace the damaged tires free of charge. Fortunately though, Michelin’s lead engineer for the C7 Corvette Lee Willard issued the following statement to CorvetteForum.com:
“This winter has been extremely harsh in much of the country and some recently shipped Corvette tires may exhibit cracking. In general, summer tires should never be driven on or moved in temperatures under 20°F because they may crack. Tires should be carefully inspected at the dealership before taking delivery of a vehicle.” declared Willard.
“Never use a tire with freeze cracks, breaks, or damage to the sidewall or tread. For those residing in colder climates, Corvette owners should have a plan for vehicle storage during cold winter months. If your garage drops below 20°F regularly, consider removing tires and storing them inside. If you live in colder climates and want to drive your vehicle in temperatures below 40°F we strongly recommend investing in a set of winter or all-season tires.” he added.
As things stand now, Michelin is right - it’s not their fault that the tires on brand spanking new C7 Corvette Stingrays and Z06s were cracked, but General Motors'. It’s the carmaker’s duty to ship new cars from assembly plant to dealer in perfect conditions, including temperature. Let’s keep those fingers crossed General Motors will man up and replace the cracked tires at no cost to the owners in the near future.

Michelin Tire Cracking Guide

Michelin tire cracking sidewall

Michelin’s 'Ozone or Weather Cracking Visual Tool' chart is useful to determine if tire cracking is cosmetic (non-warrantable), or severe (warrantable). Compare your tires to Michelin's tire sidewall cracking chart. (As an Amazon Associate, I earn from qualifying purchases). Tire safety is extremely important. This video shows how to check for dry rot even if the tire appears to have plenty of useable tread left.

Michelin Tire Cracking Guide

This is why tires that are stored in a garage can still get tire cracks: electric motors can create ozone that degrades the rubber in tires. This type of tire sidewall cracking is sometimes called ozone cracking or weathering. As a tire continues to degrade and dry out, dry rot can occur. Chemicals can also cause cracked tires.

Michelin Tire Cracking Chart

It’s been only a week since CorvetteForum.com member sdtoothdoc uploaded photographs of his 2015 Corvette Z06 wearing cracked tires all-round. Following this rather disappointing state of the Michelin Pilot Super Sport ZP / SC2 tires, a Michelin official cleared the matter up for CorvetteForum.
In the original forum thread, sdtoothdoc says that “my A8 Z finally got here in San Diego and took her home a few miles away. As suspected, all 4 tires have cracks like Dennis's from Las Vegas. When at the dealer, they said that 4 other Stingrays all have the same cracks in the tires. Car looks amazing otherwise!” What can we learn from this? It’s not an isolated case...
Considering that a new set of high-performance Michelin rubber costs more than $2,000, both C7 Corvette owners and enthusiasts wondered if dealers will replace the damaged tires free of charge. Fortunately though, Michelin’s lead engineer for the C7 Corvette Lee Willard issued the following statement to CorvetteForum.com:
“This winter has been extremely harsh in much of the country and some recently shipped Corvette tires may exhibit cracking. In general, summer tires should never be driven on or moved in temperatures under 20°F because they may crack. Tires should be carefully inspected at the dealership before taking delivery of a vehicle.” declared Willard.
“Never use a tire with freeze cracks, breaks, or damage to the sidewall or tread. For those residing in colder climates, Corvette owners should have a plan for vehicle storage during cold winter months. If your garage drops below 20°F regularly, consider removing tires and storing them inside. If you live in colder climates and want to drive your vehicle in temperatures below 40°F we strongly recommend investing in a set of winter or all-season tires.” he added.
As things stand now, Michelin is right - it’s not their fault that the tires on brand spanking new C7 Corvette Stingrays and Z06s were cracked, but General Motors'. It’s the carmaker’s duty to ship new cars from assembly plant to dealer in perfect conditions, including temperature. Let’s keep those fingers crossed General Motors will man up and replace the cracked tires at no cost to the owners in the near future.

Michelin Tire Cracking Guide

Michelin Tyre Cracking

I just replaced all 4 tires on my 2000 Olds Silhouette (van).
All 4 tires had heat cracks between each tread all the way around.
At first I saw small cracks starting, then after a few months and one trip down to MB, South Carolina and back (2200K miles) those small cracks all joined up (end to end).
Those tires only had about 35k miles on them on tires with a 75k expected life.
None of the mileage was done on any road other than asphalt.
Are high speed driving and UV rays the only reason for this failure?
I have BF Goodrich Precepts on now and find these great for holding the road in heavy rain.
Plus, they are quieter than the old ones (which turned out to be noisy from the get go).





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