: Same size tires all around



kschwed
12-23-12, 12:52 PM
I'm getting ready to put some new tires on my car and I'm wondering if there is really a downside to going to same size all the way around? (235/50R17) I had the Conti DWS in mind. I want something that will last a while and be quiet. I live in Southern California, so I never see snow and rarely see rain. Let me know what you think.

Thanks,

dkozloski
12-23-12, 02:20 PM
My '06 V8 STS4 has different rim width wheels front and rear, 8" front and 8 1/2"rear. That being said, I use the same size winter tires all the way around but still put the wide rims in the rear. I maintained the staggered tire and rim sizes and locations with summer tires.

curtc
12-23-12, 02:35 PM
No issue whatsoever, do it, then you can rotate them.

kschwed
12-23-12, 03:04 PM
Well, I can't rotate them. Last time I took the wheel hubs off, I noticed the rears said "rear only". I think the rims are wider in the rear.

malatu
12-23-12, 03:07 PM
As far as a quiet tire, I don't think there very many tires out there that "fit the bill" like the Conti DWS does.

Undersand that the softer the tread the quieter the tire will be, but won't last as long. It's a trade-off.

Of course, the tread pattern aslo effects "road noise".

kschwed
12-23-12, 04:14 PM
I need a tire that will take me at least 30k miles. I probably wont have the car for more than about 3 more years. Noise is a priority, but longevity is a bit more important.

I have Yokohama AdvanS.4's on now. They lasted about 30k, which pisses me off because I spent nearly $800 on the set and expected them to last 50k.

EChas3
12-23-12, 05:15 PM
My DWS are fine after 30k; still quiet.

They are warrantied for 50K.

curtc
12-23-12, 06:23 PM
My DWS are fine after 30k; still quiet.

They are warrantied for 50K.

Yep.

JGarten
12-24-12, 11:42 PM
I have exactly what you're describing: 235/50R17 Continental DWS on all four (staggered) rims. I rotate them front to rear. The"rear"rims work just fine on the front and vice versa. I have been doing this for years without issue. Only when an alignment is required do I ensure the rims are in their "proper" places. BTW, I *love* the Conti DWS. Replaced Michelin Pilot sport A/S Plus (harsh and noisy ride). The Conti's are supple and handle great. Merry Christmas!

Greg00coupe
12-25-12, 02:51 PM
I have exactly what you're describing: 235/50R17 Continental DWS on all four (staggered) rims. I rotate them front to rear. The"rear"rims work just fine on the front and vice versa. I have been doing this for years without issue. Only when an alignment is required do I ensure the rims are in their "proper" places. BTW, I *love* the Conti DWS. Replaced Michelin Pilot sport A/S Plus (harsh and noisy ride). The Conti's are supple and handle great. Merry Christmas!

My experience too...

alane
12-25-12, 08:58 PM
I'm thinking about putting aftermarket rims on my 08 STS RWD and suggestions on which sizes fit and what would look the best and ride the best???

MGrutza
01-05-13, 06:05 PM
Did you get a response for your 08 RWD? I want same but for winter. I now have fronts tires=235/50/ZR18 - 97V and rears = 255/45/ZR18 - 99W

curtc
01-05-13, 11:07 PM
235/50/18's fit well all around I hear, plan on doing that in the spring.

orange57
01-06-13, 11:24 AM
I recently put Yokohama YK580's on my wifes Saturn Vue and was so impressed with them I put them on the STS about a week later. So far, they have been great tires.

mckellyb
01-09-13, 08:49 PM
The Continental DWS behaves as if it were designed for the STS.

Quiet, and I thought I'd have to put on new shoes 7K miles ago.

They've suddenly started wearing like iron. Today, hard rain, still no hydroplaning @ 70 MPH, and I know how worn they are.

EChas3
01-09-13, 09:14 PM
I've got over 25,000 on mine and they are still quiet and have great traction. I do rotate them every oil change, roughly annual & 10k.

jsiddall
01-10-13, 10:14 AM
I just put winter tires on my STS, same size Dunlop SP Winter Sport 3D 235/50R18 all around with aftermarket Niche NR10 rims. So far so good.

102197

06 STS Rob
01-10-13, 05:37 PM
I ran 255/35/20's on all 4's for about 10k miles with no problems at all. They were Nitto 555's on KMC Dimes. I enjoyed them right up to the day I traded the car in. The Nitto's were good for So Cal but the guys on the east coast who actually have winter months may not like them. Car was a little rough compared to stock, but by no means did it ride rough. I got many compliments from people that rode in the car about how smooth it was with 20's.

kschwed
01-28-13, 11:46 AM
I got the DWS's put on a couple days ago and couldn't be happier. I went the same size all around.

Thanks for the tips guys.

konoplya
06-25-13, 01:52 AM
sorry fellas to bring this up from the dead, but the STS 4 that i have has the same size tires as OP (235R5017). i need some new tires and found a guy that has a whole set of almost brand new 225R5017 for a great price. i know the size is a little smaller but was wondering if that would work without problems on stock STS rims? thanks!

C&C
06-25-13, 05:15 AM
They would work, they would fit the rim but the speedometer is going to read faster than you are really going. About 2% difference (using Michelin MXM4 specs).

konoplya
06-26-13, 02:53 PM
They would work, they would fit the rim but the speedometer is going to read faster than you are really going. About 2% difference (using Michelin MXM4 specs).

not that i would particularly care about that, but whats the explanation behind that? 225 is the width so how would that impact the speedometer read? i was more curious whether the 225 would be too narrow and cause long term problems for the wider stock rim or vice versa. thanks!

RippyPartsDept
06-26-13, 03:39 PM
225 (width) in mm
50 (aspect ratio) percent value that the side wall is in comparison to the width
17 (wheel size) in inches

so the overall diameter of that tire in inches is (225)x(.50)x(2)x(.03937)+17 = 25.85825 inches
the x2 is for the two sidewall sections and the .03937 is to convert the mm to inches

for your factory 235/50r17 the overall diameter is 26.25195 inches

some more math gives you the difference in circumferences which then leads you to the % difference the spedo will read off

...

btw, there are online calculators to check if two tire sizes have the same overall diameter (or if they're close)

note that the sts and srx vehicles that have these staggered tire sizes still have the same overall diameter for both the fronts and the rears (although that doesn't mean you can/should rotate them)

...

and for the record, i only recommend using the factory tire sizes (on any vehicle)

---

re: wider/narrower tires -- the contact patch with the road is not as large on a narrower tire so the traction will break sooner

1crock
06-26-13, 03:49 PM
While that's the theoretical size of the tire, it's best to check the actual diameter. Tire rack and some other places have those numbers. Theactual size and the calculated size aren't always the same.

RippyPartsDept
06-26-13, 03:51 PM
true

EChas3
06-26-13, 09:14 PM
FWIW, the STS AWD uses open differentials, so you'd be fine, mechanically. If the used tires are over five years old, they are suspect, regardless of the tread.

konoplya
06-29-13, 04:55 PM
ah ok. some really good information. thank you guys so much. the tires are from 2012 that my buddy has so i should be good. they're literally like new.
i never really thought about the width from the mathematical perspective like that, i just thought about the 50 being 50mm and not a percentage figure. thanks for that.