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Subaru B9 Tribeca (B9X)

8368 messages,  Last post on Nov 24, 2012 at 9:27 AM

You are in the Subaru B9 Tribeca Forum.

What is this discussion about? Subaru B9 Tribeca, SUV

Messages Page 837 of 837

#8360 of 8368 Re: Newbie [mikejl] by xwesx

Dec 03, 2009 (2:28 pm)

Replying to: mikejl (Dec 03, 2009 10:26 am)
I just looked them up, and they have a treadwear rating of 640, which is pretty good. I would think they should last 50,000 miles or more under normal use.

#8361 of 8368 Re: Newbie [xwesx] by ateixeira

Dec 03, 2009 (6:53 pm)

Replying to: xwesx (Dec 03, 2009 2:28 pm)
That's almost too good. I wonder if the tread would be sticky enough, they have to compromise something to get such long life.
 
I've owned tires rated 140 (gumballs) up to 460 (hard), but 640 is nuts!

#8362 of 8368 Re: Newbie [ateixeira] by xwesx

Dec 03, 2009 (7:22 pm)

Replying to: ateixeira (Dec 03, 2009 6:53 pm)
That can be an issue, but the best all-season I have ever experienced, the Goodyear Assurance Tripletred, also has the highest wear rating: 740! They have an unbelievable 80,000 mile treadwear warranty (and an initial tread depth of 11/32), yet were fantastic on snow and ice, even at ridiculously cold temperatures (as cold as -50). So, treadwear rating is not everything.
 
For reference/comparison to the 740 rating on the above-mentioned tire, I drove a set of Goodyear Allegras, which I think are great in terms of cost vs. performance (for everyday, year-round driving), 76,000 miles. They have a rating of 680.

#8363 of 8368 Re: Newbie [xwesx] by ateixeira

Dec 03, 2009 (8:22 pm)

Replying to: xwesx (Dec 03, 2009 7:22 pm)
Wow, I didn't realize the ratings went that high.
 
My Miata has 140 rated tires. I've been taking it easy, I suppose, but I bet they give me 2 years, tops.

#8364 of 8368 Re: Newbie [ateixeira] by xwesx

Dec 04, 2009 (10:55 am)

Replying to: ateixeira (Dec 03, 2009 8:22 pm)
Well, apparently the rating system is not absolute. In other words, "740" does not equal "80,000 miles," etc. It is supposed to be a methodology to allow the consumer to gauge the relative tread life of a tire. In other words, one can expect a 320-rated tire to last longer than 140. 560 should last longer than 440, etc. Many tires, like studless ice/snow tires and ultra-high performance tires, do not even list such ratings because their life is so dependent upon road conditions. A set of Blizzaks might last 30-40K miles on icy roads, but only 15-20K on dry (or mostly dry) roads... even less if the ambient/road temperatures are very warm.
 
The 740 on the TripleTred is the highest I've seen. One of the other posters on Carspace, ruking1, claims over 100,000 miles on tires he has owned, but I do not know how highly the tires were rated for treadwear. He has a specific method for "breaking in" the tires and takes it pretty easy on them when driving.
 
I think one major factor for tread longevity is the time over which those miles are accumulated. If you run a set of TripleTreds at 4-5,000 miles a year, you will likely have to replace the tire long before you hit 80,000 miles. There might be tread on it, but the rubber compound is likely going to be so aged that performance is severely diminished, as well as sidewall integrity.
 
I have a set of tires on my '69 Chevy that were installed in July 1997. I have about 40,000 miles on them, and they have tread left, but they really need to be replaced.

#8365 of 8368 Re: Newbie [xwesx] by ateixeira

Dec 04, 2009 (11:09 am)

Replying to: xwesx (Dec 04, 2009 10:55 am)
True, it's also a rating by the manufacturer, FWIW.
 
But the treadwear warranty says they stand behind it.

#8366 of 8368 Re: Newbie [ateixeira] by robr2

Dec 04, 2009 (12:19 pm)

Replying to: ateixeira (Dec 04, 2009 11:09 am)
True, it's also a rating by the manufacturer, FWIW.
 
That's right - you can only compare treadwear ratings within the manufacturer. A 440 rated Michelin is not equal to a 440 rated Goodyear.

#8367 of 8368 Re: Newbie [robr2] by xwesx

Dec 04, 2009 (1:57 pm)

Replying to: robr2 (Dec 04, 2009 12:19 pm)
Oh. That's good to know. Thanks for pointing that out, Rob!

#8368 of 8368 Re: Front Bumper Underguard [subienewbie2] by xanderv

Nov 24, 2012 (9:27 am)

Replying to: subienewbie2 (Apr 23, 2006 1:51 pm)
You installation was not done properly. Please refer to the factory installation sheet.

Messages Page 837 of 837

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