Yet another tire thread - 225 vs. 235 - Page 2 - SaabCentral Forums
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  #21  
Old 27th February 2010
VwAlex VwAlex is offline
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Quote:
Originally Posted by aslan View Post
so you say no difference in quality of the ride??
i wanna put 235s on my aero; but if they come too expensive, i was thinking of putting 235 on the back and 225 on the front; u think its a goo idea?
Make an already understeering car even worse? If anything put the wider in the front, but the difference in between 225 and 235 in price is so little I really don't understand how you could pay gas for the car and not 10-20$ more per tire...
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  #22  
Old 27th February 2010
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my wheels are 8" wide and I run 225. You can't really tell any difference in performance I think unless you start to go even wider than that which isn't really possible. I think it would just be personal preference and price. The only reason I see for buying the 235 would be the fact that the tire sticks out over the wheel a bit more for more rim protection, but even the tires I have that are 225 have very thick rim protectors, so it really depends on the tire.
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  #23  
Old 27th February 2010
VwAlex VwAlex is offline
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Originally Posted by Breau View Post
my wheels are 8" wide and I run 225. You can't really tell any difference in performance I think unless you start to go even wider than that which isn't really possible. I think it would just be personal preference and price. The only reason I see for buying the 235 would be the fact that the tire sticks out over the wheel a bit more for more rim protection, but even the tires I have that are 225 have very thick rim protectors, so it really depends on the tire.
There's sufficient room inside the fenders to run at the very least 245s with a proper suspension. I'm gonna try 265s for fun this summer... on a 8inch rim.
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  #24  
Old 28th February 2010
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Quote:
Originally Posted by aslan View Post
so you say no difference in quality of the ride??
i wanna put 235s on my aero; but if they come too expensive, i was thinking of putting 235 on the back and 225 on the front; u think its a goo idea?

No, definately not in a FWD car.
Besides which, doing that will (when you get to speed) through off the ABS and ESP systems and give you warning lights there.
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  #25  
Old 28th February 2010
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Originally Posted by SaabScott View Post
No, definately not in a FWD car.
Besides which, doing that will (when you get to speed) through off the ABS and ESP systems and give you warning lights there.
you mean NO to the whole 235 at the back and 225 at the front thing??
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  #26  
Old 28th February 2010
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Quote:
Originally Posted by aslan View Post
you mean NO to the whole 235 at the back and 225 at the front thing??
Correct. Same tire sizes all around unless you're up to converting to RWD and reprogramming ESP while you're at it.
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  #27  
Old 28th February 2010
VwAlex VwAlex is offline
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Originally Posted by MacNoob View Post
Correct. Same tire sizes all around unless you're up to converting to RWD and reprogramming ESP while you're at it.
While I agree it's bad for understeer, it is probably not a significant enough difference to throw esp and abs off. Some 225 are wider than and talller than some 235 and even a difference in wear could make the same heigth difference (wich is all that mattters for abs and esp).
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  #28  
Old 28th February 2010
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Originally Posted by MacNoob View Post
Correct. Same tire sizes all around unless you're up to converting to RWD and reprogramming ESP while you're at it.
defiantly not planning to do make of those conversions anytime soon.
in terms of clearance and turning, there are not gonna be any problems with 235/45ZR17 ???
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  #29  
Old 1st March 2010
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Aslan Bazza69 and I both run 235 14 17 (front and rear) I have no issues with either clearance or turning and the wheels are 7.5".
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  #30  
Old 2nd March 2010
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Originally Posted by Trollwagon View Post
Aslan Bazza69 and I both run 235 14 17 (front and rear) I have no issues with either clearance or turning and the wheels are 7.5".

235/40/17?

I have 18s for my summer tires and am going to purchase (maybe?) 235/40/18 hopefully there will be no rubbing issue... I am pretty sure the rims are 8" wide because the current 225/40/18 that I have on there almost looked stretched, and I hate that look
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  #31  
Old 2nd March 2010
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just spoke to a mechanic;
he said that my suspension wont handle 235s;
i got 2000 9-5 aero, and i have never any mods my suspension; is he right?
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  #32  
Old 2nd March 2010
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Ummm...No.
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  #33  
Old 2nd March 2010
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Quote:
Originally Posted by aslan View Post
just spoke to a mechanic;
he said that my suspension wont handle 235s;
i got 2000 9-5 aero, and i have never any mods my suspension; is he right?
Just don't go back there...
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  #34  
Old 2nd March 2010
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by mods i mean, i am still running the old suspension, and never replaced anything on it
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  #35  
Old 3rd March 2010
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I've been running 235/45 tyres on 9-3 aero alloys on my 9-5 for nearly 2 yrs and the car does handle better. Because my car is the aero 9-5 it gets through tyres quite quickly and I've had conti's Dunlops and Michelin Pilots and I can say that the Michelin Pilots Sport2 235/45's were by far the best tyre. The grip was phenomonal compared to all other brands and I will return to them when I need new ones. As far as ESP and all the tech stuff goes, its all relative, the ESP only cuts in when grip is lost and the car is not going in the direction related to the steering angle and YAW of the car, but if you have better grip then it just means you can push the car harder before slip occurs and ESP kicks in which is why people say ESP will not work properly, it does, trust me I know, it just means you push the car harder than you could before.

Last edited by "superaero"; 3rd March 2010 at 03:30 PM. Reason: Incomplete
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  #36  
Old 3rd March 2010
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hi, i guarantee you`ll notice no difference in 225 and 235 , UNLESS the profile is differant.
i mean , we only tallkin about 10 MM !!
the actual tyre contact on the road of a 235 could be the same as a 225 because the radius on the edge of the tyre could be different, therefore affecting ACTUAL tyre contact on the road.
the lower you go in profile you WILL get more road noise, and you will have to " steer " it as it actually tracks on the road . i.e my inlaw had std tyres on his car , nad you could steer with one hand casually , then he went to low profile , and you had to end up using two hands to steer as the car now tracked bad... bit weird to describe... but it was definaely harder.different to steer.
mark k

Quote:
Originally Posted by SaabScott View Post
So, most of you know that I have Wulf's old 9-5.
Some, especially me, would say it was the best he ever had.

I need to put new rubber on it when the winters come off.
No, have no fear, this is not just another tire thread.

I am wondering who has moved from the stock 225 to 235's that the 06 and later models came with.

The main reason for my question is that I am wondering just how much the wider (and stiffer - usually with a sidewall rating of 94 vs. the 225's 91) tire makes a difference to the ride and feel of an 05 (or earlier).
I have noted many times (and been backed up by guys like Wulf) how much different (read that as better) the 06 and later 9-5 feels on the road.
The ride is more controlled, steering is better, and overall feel is tighter.

How much of that can be attributed to the tires?

Who has done this and can share their experiences?

I'm planning on going with the Michelin Pilot Sport A/S+ when the time comes and it is just a matter of deciding on the size.
I am quite willing to do what I can to make my 05 feel more like a later model 9-5.

Also, I'm planning on putting those tires on what may be the favourites around here, the double 3-spoke from the 9-3.
Anyone put a 235 on those tires? Can you share some pics?
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  #37  
Old 3rd March 2010
VwAlex VwAlex is offline
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Quote:
Originally Posted by krawczuk View Post
hi, i guarantee you`ll notice no difference in 225 and 235 , UNLESS the profile is differant.
i mean , we only tallkin about 10 MM !!
the actual tyre contact on the road of a 235 could be the same as a 225 because the radius on the edge of the tyre could be different, therefore affecting ACTUAL tyre contact on the road.
the lower you go in profile you WILL get more road noise, and you will have to " steer " it as it actually tracks on the road . i.e my inlaw had std tyres on his car , nad you could steer with one hand casually , then he went to low profile , and you had to end up using two hands to steer as the car now tracked bad... bit weird to describe... but it was definaely harder.different to steer.
mark k
Tracking is much more related to tire thread than size. Some performance tire will indeed follow tracks but thats a small tradeoff but the much improved grip.
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  #38  
Old 3rd March 2010
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SaabScott SaabScott is offline
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Quote:
Originally Posted by krawczuk View Post
hi, i guarantee you`ll notice no difference in 225 and 235 , UNLESS the profile is differant.
i mean , we only tallkin about 10 MM !!
the actual tyre contact on the road of a 235 could be the same as a 225 because the radius on the edge of the tyre could be different, therefore affecting ACTUAL tyre contact on the road.
the lower you go in profile you WILL get more road noise, and you will have to " steer " it as it actually tracks on the road . i.e my inlaw had std tyres on his car , nad you could steer with one hand casually , then he went to low profile , and you had to end up using two hands to steer as the car now tracked bad... bit weird to describe... but it was definaely harder.different to steer.
mark k

Really?
I could understand that if everything else was EXACTLY the same.
As I have stated, and the reason for the question in the first place, is that 235's (in most cases - well, every case I have seen yet) have a higher sidewall rating.
That means the sidewall is stiffer.
You talk about the cross-section of the tread being only 10mm more ... well, on a 45-profile tire, the increase in sidewall height is only 4.5mm.
Moving from a 91Y to a 94Y makes a difference.
Keep in mind, I am coming from Conti Extreme Contacts which have a 91Y sidewall rating and looking to move to a 235 with a 94Y (possibly XL as well).
It should make some sort of difference.

OK ... slightly different question ...
Will the 235 fit OK on a 7" wheel?
Yes, I know some have said they have fit up to a 265 ... but is there anything out there where someone in the industry gives size ranges?
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  #39  
Old 3rd March 2010
Darknessph Darknessph is offline
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Quote:
Originally Posted by SaabScott View Post
Really?
OK ... slightly different question ...
Will the 235 fit OK on a 7" wheel?
Yes, I know some have said they have fit up to a 265 ... but is there anything out there where someone in the industry gives size ranges?
Nice post about the tire contact patch. Not only different tires for the same size (not just width, I mean all of them- width, height, diameter) have different contact patch, the wheel width which tire is mounted on also have effect.

Wider Tires mounted on rims narrower than it was designed for is not always "better".


Imagine this -->[ <-- as the tire's cross section mounted on a rim of proper width for the tire. With wide tire that is mounted on narrow rim, contact patch will end up looking more like --->C <--- due toside wall having to cave-in to narrower wheel. Wider tires = probably more contact patch and more longitudal grip (like as in launching or forward movement), but lateral grip improvement would be a lil' questionable. Also, steering may feel more numb.

As for 7" rims and 265 width, that may be the case with very tall profile tires for trucks and SUVs. With not so tall tires like in our case, 7" rims would be maxed out at 235 width: 7" rim width's proper tire width is 215mm. Following is the Saab listing according to a post on Saabnet. The number after rim dia. is the rim width the tire should be mounted on.

Quote:
Band Velg Afwijking ET Naaf
Breedte Hoogte Diameter J Steekmaat Wielbout
205 65 15 6 5/110 - 49 65.1
205 65 15 6.-7 0.05%+
215 60 15 6-7.5 1.26%-
215 65 15 6-7.5 2.06%+
225 60 15 7.-8 0.59%+
235 55 15 7.5-8.5 1.19%-
235 60 15 7.5-8.5 2.45%+
245 55 15 8.-9 0.51%+
205 60 16 6.-7 0.81%+
215 55 16 6-7.5 0.66%-
215 60 16 6-7.5 2.66%+
225 55 16 7.-8 1.04%+
235 50 16 7.5-8.5 0.89%-
235 55 16 7.5-8.5 2.74%+
245 50 16 8.-9 0.65%+
205 50 17 6.-7 1.6%-
215 50 17 6-7.5 0.06%-
225 45 17 7.-8 1.99%-
225 50 17 7.-8 1.49%+
235 45 17 7.5-8.5 0.6%-
245 45 17 8.-9 0.79%+
205 45 18 6.-7 0.85%-
205 50 18 6.-7 2.32%+
215 45 18 6-7.5 0.54%+
225 40 18 7.-8 1.54%-
225 45 18 7.-8 1.94%+
235 40 18 7.5-8.5 0.3%-
245 40 18 8.-9 0.93%+
225 35 19 7.-8 1.09%-
225 40 19 7.-8 2.38%+
235 35 19 7.5-8.5 0.01%-
245 35 19 8.-9 1.07%+
225 30 20 7.-8 0.64%-
225 35 20 7.-8 2.83%+
235 30 20 7.5-8.5 0.28%+
245 30 20 8.-9 1.21%+
235 25 21 7.5-8.5 0.58%+
245 25 21 8.-9 1.35%+
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  #40  
Old 4th March 2010
SaabNineThree SaabNineThree is offline
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anyone know the width on the double spoke aeros?
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