STS4 05 Tires 1sg - Page 2

Cliff8928 · #16 (**permalink**) 01-13-09, 02:51 AM

I've always had good luck with F1s. The STS-V has the F1 all-season. They're WORLDS better than the stock Pirelli Eufori@. I'm sure the regular STS probably comes with better tires than those Pirellis too..

jimd05sts4 · #17 (**permalink**) 01-13-09, 11:54 AM

just put the pilot sport a/s on my car with the staggered fit same as before. replaced the pilot mhmx4 i think, wow the car handles like a my buddies vet. i love these tiresand paid 850 at the tire rack delivered w tax.

C&C · #18 (**permalink**) 01-13-09, 06:56 PM

Just got back from the dealer today; had the hx mvmx4's swapped out for the Pilot Sports A/S myself. Too soon to tell but I'm hoping to be as happy as you seem to be. I have an '06 STS rear drive with the staggered 235/50/17 and 255/45/17. It's a directional tire and good looking/aggressive tread pattern.

05STSCaddyman · #19 (**permalink**) 01-13-09, 08:02 PM

I was told by my GM service writer not to use the same size all the way around. It will effect the traction control. I just ask him to rotate the tires not knowing that they are different sizes. He told me no matter what people tell you stay with the factory design.

BaTu · #20 (**permalink**) 01-13-09, 08:48 PM

As I understand it, even though the tire sizes Are different, what's important is that the circumference (as it's the distance the car travels in 1 rotation) be the same front & rear.

Remember the "45 series" is the aspect ratio so as it goes down the actual size can be increased and the circumference can remain the same.

That being said.... I kinda agree with Cadillac Service, why change THEIR plan? What ever the reason for their design, when it comes time for tires for me, I'll replace what they did.

cguthrie · #21 (**permalink**) 01-25-09, 09:33 AM

I have an 05 STS 1sg and switched to the Pilot Sport AS 255/45's all the way around about 20K ago.

Absolutely love the tires, completely different car in the rain - rear wheel drive only - and stops better than anything else I've owned.

Wearing evenly to date, with amazingly little wear!

Unbelievably better tire than original.

CG
2005 1SG 48K

Dadollac1 · #22 (**permalink**) 06-05-09, 12:38 PM

I've had the Sunny 3800 series tires 235/50-18 and 255/45-18 on my whip for about 2 weeks and tho they make a little himming sound when in use (which doesn't bother me) they are excellent in the rain. It rained for about a week straight and I put my STS through some heavy wet weather manuvers and the tires faired quite well. For the $411 I paid for them I'm really amazed.

I really think these tires are sleepers if you know what I mean.

jamesbalzer · #23 (**permalink**) 06-06-09, 12:31 AM

This isn't news to most, but I believe that the staggered tires are found on the 1SG's. I know that mine are staggered with the 1SG which included the 18" wheels. The 17" wheels are on all others (except the V) and they came with like tires at all four corners.

next2pool · #24 (**permalink**) 06-06-09, 01:16 AM

I just installed a set of Kumho Ecsta ASX staggered tires and they are mucho better than the OEM michelins, but thats not saying much since the originals were pretty ratty. So far ride and noise are excellent except for curves such as exit ramps--perhaps the nubs will wear off. It doesn't snow here, and only occasional rain, so school is out.

skozzy · #25 (**permalink**) 09-03-09, 03:06 PM

Hey I was just searching for tire information and I came across the these Nexen N7000's. I have a 1SG AWD has anyone heard of these? They seem to be rated fairly well and about half the cost of the Michellen

porkfarm · #26 (**permalink**) 09-04-09, 08:17 AM

Putting 4 Bridgestone LM22 on the wife's 2007 STS4 today. all same size.. 105 bucks each from the rack. Should go through the snow nice this winter eh ? How could I beat it for that price ?!

throhrer · #27 (**permalink**) 10-31-09, 02:05 PM

The 1sg comes with P235/50R18 on the front and P255/45R18 on the rear.
The P235 has a diameter of 27.25" while the P255 hasa diameter of 27.03"

Why not use the P235 all the way around??? There would be 6 Rev/mi less and the taller tire in the back should produce slightly better gas mileage??

Or will there be problems that only the GM designers know about!!!???

I would like someone's opinion on my thinking..........good or bad.
Thanks,

Tom

jamesbalzer · #28 (**permalink**) 10-31-09, 02:14 PM

Bought a set of Bridgestone Touranza Serenity's last month. Stayed with the stock, varying tire size. Expensive as hell (over $1200) but all of a sudden this 1SG rides like a Cadillac should. Smoother, softer, quieter. Too soon to tell how they will last, but they cam with a 50K treadwear warranty, whatever thats worth...nice tires. Strongly recommend for all you guys complaining about ride quality on the 1SG with MRC.

z06bigbird · #29 (**permalink**) 10-31-09, 03:14 PM

For an expert answer on using same size tires with staggered wheels, call one of the following:

Bud Davis Cadillac in Memphis, Tn. He has the biggest tire/wheel dept of all Cadillac dealers in country. Ask for mgr of tire dept.

or

Try Paul at Cavender Cadillac in San Antonio, Tx. Paul is tire/wheel mgr.

EChas3 · #30 (**permalink**) 10-31-09, 05:25 PM

I've pretty well concluded to go with 255's all around my 1SG AWD. We see a fair amount of snow (generally less than 10 events) but the AWD mitigates much of that. Now my decision hinges on how far into an All-Season tread-pattern do I want to go? The tire shoulder is a typical engineering trade-off between road noise and adverse weather traction.

My wife's RWD is getting its Blizzak's back next week. Her OEM Michelin Energy LX4 P235-50R17 (ala Hertz RPO code) will be gone. They were not up to the car's performance, anyway. In Spring she'll get Summer tires, P255-45R17 perhaps? They would make her speed read 0.84% too fast. A perfect match for her lead foot (said affectionately, of course)!