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I recently bought a CPO Audi technik in Ontario and was a bit concerned about how much the tires were worn. But as any good salesman my said it met Audi standards and would last at least 2 seasons. When I got the inspection report it indicated 4.5mm (6/32). It was very close to the wear bar. I would have thought that this would not meet inspection and Audi would have a higher standard. The sales manager was insistent that the tire will last 2 seasons at least and meets Audi standard. Should I accept the dealers claim?
Did you measure it yourself? It's hard to tell much from photos. "Very close" to the wear bars is relative. Wear bars are at 2/32 and new tires are typically 10/32 - sometimes 11-12/32. So new tires will be 1/4" from the wear bars, which may already appear "very close".
If it's truly at 6/32 on a tire that started at 10/32, then it's at about 1/2 life. Tires on my cars have lasted from 20K on my M5 to 60K on my daughter's RX350. Others can give specific data on an A4 - mine's too new (to me).
If 2 seasons is literally 6 months, there's no problem. If it's 2 years, at 10-12k miles/year, it's still reasonable.
When I got the inspection report it indicated 4.5mm (6/32).
Brand new tires have somewhere in the neighborhood of 10/32 tread depth and are expected to be replaced by the time they hit 2/32. Yours have lost 4/32 out of 8/32 of useable tread. You should be good for a while.
Thanks for the feedback, I will measure it myself to be sure. It is all season, Hankook Ventura so evo2. I am attaching another picture which is a bit more clear.
2/32 is fine for dry climates without snow/rain, or very little rain, otherwise 4/32 is the absolute minimum to avoid hydroplaning risk and loss of wet braking distance. Going from 6/32 to 4/32 will roughly be around 5000 miles (8000 km), depending on a lot of factors.
Please double check that these are all season tires (if they have M+S written on the sidewall, then they are); everything I am seeing online is that these are performance summer tires. Summer tires will be dangerous to drive when temperatures go below 40 F (5 C) due to loss of traction, so you'll need to get winter tires or good all season tires, seeing that you live in Ontario.
Those look like the Summer Performance tires that come with the A4s, Hankoonk Ventus S1 Evo2, and the tread pattern definitely supports that.Just a reference point I have the same tires on my car and am at 7/32 after 20k miles. Most is highway driving, however.
Please double check that these are all season tires (if they have M+S written on the sidewall, then they are); everything I am seeing online is that these are performance summer tires. Summer tires will be dangerous to drive when temperatures go below 40 F (5 C) due to loss of traction, so you'll need to get winter tires or good all season tires, seeing that you live in Ontario.
I suspect that's what OP meant by seasons - winter tire vs summer tire seasons. They do look like the Hankook's noted above. That tire's UTQG wear rating is only 280, significantly less than the P7's 500. While these ratings aren't consistent across manufacturers, this indicates to me you may only expect 20-25K on a set. New is 10.6/32 and your 4.5mm is slightly lower than 6/32, so you may in fact only have 8k miles or so down to 2/32.
My experience with folks living in Canada is that they're quite aware of tire types, appropriate seasons, etc. Much more so than most in the US (northern New England, Minnesota, etc., excepted)
Fwiw, hydroplaning resistance and braking distance increases are a continuum from new tires all the way down to slicks. I've regularly run mine to 2/32 and lower without incident - just intelligent driving.
I suspect that's what OP meant by seasons - winter tire vs summer tire seasons. They do look like the Hankook's noted above. That tire's UTQG wear rating is only 280, significantly less than the P7's 500. While these ratings aren't consistent across manufacturers, this indicates to me you may only expect 20-25K on a set. New is 10.6/32 and your 4.5mm is slightly lower than 6/32, so you may in fact only have 8k miles or so down to 2/32.
My experience with folks living in Canada is that they're quite aware of tire types, appropriate seasons, etc. Much more so than most in the US (northern New England, Minnesota, etc., excepted)
Fwiw, hydroplaning resistance and braking distance increases are a continuum from new tires all the way down to slicks. I've regularly run mine to 2/32 and lower without incident - just intelligent driving.
I typically notice significantly higher risk of hydroplaning below 4/32, especially at highway speeds, and it rains frequently in the winters where I'm from (pacific NW). Hydroplaning is on/off at the critical moving speed, not a continuum (although the critical moving speed at a particular water depth would be); I think it's safer to not have to worry about it, and change tires at 4/32 (many tire shops will also honor warranties from 4/32). Braking distance does not linearly decrease with decreasing tire tread depth; after 4/32, it decreases at a higher rate than from 10/32 to 4/32. It's more of a logarithmic decay.
06-09-2019, 03:59 PM
CPO Audi standards
