[opfreak]

I know I'm more then 18 months away from my lease return, but with a new job I will be driving a lot more then I have in the first half of the lease.

Car came with PSS tires, but on tirerack right now they have a really decent deal on Continental ExtremeContact DW.

300 dollars less then the PSS tires.

The safe thing to do would be to mount the Conti tires now, and save the PSS, but then I'd be paying for mounting 2x.

I'd rather burn out the PSS, then mount the Conti tires closer to turn in.

Would these tires qualify? Or how can I go about verifying?

[pz619]

They qualify assuming they are the same size and speed rating.

[HeyMoe53]

Easy--call the dealer. I know they are fussy about turning in a car with non-RFTs if it was delivered with run-flats (found out the hard way).

This time around, I took the run-flats off my '13 128, and they are sitting in the basement waiting to go back on the car when I decide to trade it in.

I did have the DW tire on my '09. Big improvement over the Pirelli run-flats. Liked them better than the Pole Position S-04s I put on my '13.

[HeyMoe53]

Having just read pz's comment, I'd tend to believe that. The size and speed rating certainly would matter.

[BEM-S4]

They need to be the same type (run flat or not) that the car came with. Need to be same size, if yours came w summer rubber must return a staggered set. Finally must be same load and speed rating or better. There is no rule about brand.

[Pparana]

bmw is easy, porsche have to be oem spec (n spec).

[opfreak]

Originally Posted by BEM-S4

They need to be the same type (run flat or not) that the car came with. Need to be same size, if yours came w summer rubber must return a staggered set. Finally must be same load and speed rating or better. There is no rule about brand.

thanks.

Both sets on tirerack are
Front 225/40ZR18
Rear 245/35ZR18

Conti Extreme are 92YXL front and rear, UTQG: 340 AA A
PSS are 88Y front, and 92Y XL rear, UTQG: 300 AA A

Both are rated as max performance summer tires.

FYI,

The Conti are selling for $478.2 vs $760.2 for the PSS. + shipping.

[BEM-S4]

Originally Posted by opfreak

thanks.

Both sets on tirerack are
Front 225/40ZR18
Rear 245/35ZR18

Conti Extreme are 92YXL front and rear, UTQG: 340 AA A
PSS are 88Y front, and 92Y XL rear, UTQG: 300 AA A

Both are rated as max performance summer tires.

FYI,

The Conti are selling for $478.2 vs $760.2 for the PSS. + shipping.

Ok so tire nomenclature confuses the hell out of me. I'd ask tire rack and check with your BMW just to be sure. The Conti may be a higher rating which is fine, but those numbers and letters could mean a lower rating. So that 340 vs 300 I'd double check just to be safe. If you tell tire rack your concerns they can definitely tell you what you need to know.

Basically bottom line you need to turn the car in as you got it or better. Not talking better from a handling perspective, PSS are great. Just from a tire spec perspective.

[Pparana]

Originally Posted by BEM-S4

Ok so tire nomenclature confuses the hell out of me. I'd ask tire rack and check with your BMW just to be sure. The Conti may be a higher rating which is fine, but those numbers and letters could mean a lower rating. So that 340 vs 300 I'd double check just to be safe. If you tell tire rack your concerns they can definitely tell you what you need to know.

Basically bottom line you need to turn the car in as you got it or better. Not talking better from a handling perspective, PSS are great. Just from a tire spec perspective.

340 is a higher tread rating than 300, usually less performance, or they may have been "retested" AA is the tire rating ability to stop in rain under federal testing, A is temp rating.

[Pparana]

you can also mount up some used ones from a reseller, did this on a merc and a Porsche. they met the tread wear and were oem, very cheap.

[BEM-S4]

Originally Posted by Pparana

340 is a higher tread rating than 300, usually less performance, or they may have been "retested" AA is the tire rating ability to stop in rain under federal testing, A is temp rating.

Exactly I didn't know if 340 was better or worse. Don't even get me started on offsets!

[HeyMoe53]

IIRC, I once read an article that the treadwear rating translated into thousands of miles of wear under average use, tested on whatever method is used.

So, 340 treadwear would translate into 34,000 "average" miles.

Of course, most people on this forum don't drive their cars in an "average" way. And, rear-drive Bimmers are harder on rear tires.

And maybe my old, feeble mind doesn't remember the story quite right.

At the least, you could use the treadwear rating as a comparison point. Higher means more expected treadwear.

I did put the DW tires on my '09 1-series, and I liked them. Wish I had done the same on my '13.

[opfreak]

Originally Posted by HeyMoe53

IIRC, I once read an article that the treadwear rating translated into thousands of miles of wear under average use, tested on whatever method is used.

So, 340 treadwear would translate into 34,000 "average" miles.

Of course, most people on this forum don't drive their cars in an "average" way. And, rear-drive Bimmers are harder on rear tires.

And maybe my old, feeble mind doesn't remember the story quite right.

At the least, you could use the treadwear rating as a comparison point. Higher means more expected treadwear.

I did put the DW tires on my '09 1-series, and I liked them. Wish I had done the same on my '13.

That article was wrong.

They test tires by putting them on a truck setup, with a few standard test tires. Then rating is then based on how much less the tires wear out compared to the test tire.

[Maynard]

Seems like best bet is to ask at the dealership you plan to turn it in to, since that will be the deciding point. Even if they 'should' be OK with another brand, you probably won't want to hassle with them over it, and you still have the option of setting the old tires aside to remount (not that big a cost to do an extra remount).

[BEM-S4]

Also I don't think anyone mentioned if you're going to lease another car w them there is a little wiggle room. If you're just under they can let it slide - don't go in w completely bald rubber though.

[HeyMoe53]

Hmmm...that "article" came from a respected car magazine, though many years ago. Nonetheless, the "test" can be used for comparison.

[HeyMoe53]

And yes, there is a pretty decent explanation on Tire Rack's website, along with traction grades, and speed rating. Not bad to read when one is tired of reading about how the Steelers screwed up (they did).

[galeface]

Can you guys confirm that at lease turn-in, you don't need OEM and they won't require tires with the star marking? I must likely will need to change tires ahead of time but I wouldn't mind saving a few bucks by not putting a set of PSS...

[DCastaneda]

Does it matter if the tires are mounted on the car? Would much prefer to turn mine in without having to mount the run-flats back on.