18's or 19's?
#16
08-05-2009 | 06:42 PM
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They're RG5's. I think the rears are 10.5", but they could be just 10". I should know that off the top of my head, shouldn't I?? With 245's, I have some slight rubbing, sometimes on wheel lock. That's why the next ones will be 235.
#18
08-05-2009 | 08:21 PM
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From: Chicago, IL USA
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Yes, those are my sizes and I am VERY happy with them. The 305/25R19 is a hard size to find, but it specs out closer than a 285/30 or 295/30R19 to the correct height.
#22
08-06-2009 | 03:12 PM
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1999 C4 Cab 6 Speed
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From: MI
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What width are your wheels and what tire size are you running?
#24
08-09-2009 | 10:23 AM
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From: Roswell, Georgia
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I have a set of both. 19" RH Allurads with PS'2s in 235/35 & 315/25 & 18" Stock hollow Turbo Twists w/ PS's in 225/40 & 295/30.
I really notice no difference in ride quality as my car is lowered on coil overs and set up pretty stiff for performance.
However, I can deff tell a difference in handleing when pushed hard.
The PSM almost never activates in the mountain twisties with the 18's.
It freaks out a lot more with the 19's, and feels like it locks up one of the front tires for a split second.
So my opinion is....19's for show, 18's for go.
I really notice no difference in ride quality as my car is lowered on coil overs and set up pretty stiff for performance.
However, I can deff tell a difference in handleing when pushed hard.
The PSM almost never activates in the mountain twisties with the 18's.
It freaks out a lot more with the 19's, and feels like it locks up one of the front tires for a split second.
So my opinion is....19's for show, 18's for go.
#27
08-11-2009 | 12:09 AM
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Posts: 82
From: Bay area
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wheel/tire size
I have a set of 19" Kinesis rims with 235/35 up front and 315/25 in the rear. I was told that in the turbos with all-wheel drive the tire size outer diameter must match between the front and rear. It was recommended that I change the fronts to 245/35. 
I have a set of both. 19" RH Allurads with PS'2s in 235/35 & 315/25 & 18" Stock hollow Turbo Twists w/ PS's in 225/40 & 295/30.
I really notice no difference in ride quality as my car is lowered on coil overs and set up pretty stiff for performance.
However, I can deff tell a difference in handleing when pushed hard.
The PSM almost never activates in the mountain twisties with the 18's.
It freaks out a lot more with the 19's, and feels like it locks up one of the front tires for a split second.
So my opinion is....19's for show, 18's for go.
I really notice no difference in ride quality as my car is lowered on coil overs and set up pretty stiff for performance.
However, I can deff tell a difference in handleing when pushed hard.
The PSM almost never activates in the mountain twisties with the 18's.
It freaks out a lot more with the 19's, and feels like it locks up one of the front tires for a split second.
So my opinion is....19's for show, 18's for go.
#28
08-11-2009 | 05:30 AM
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Posts: 1,351
From: Roswell, Georgia
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That makes no sense..... in PS2's
235/35/19 = 25.5 overall diameter
315/25/19 = 25.2
Close enough match to keep the front diff happy.....
and
245/35/19 = 25.8
so you would be going in the wrong direction.
235/35/19 = 25.5 overall diameter
315/25/19 = 25.2
Close enough match to keep the front diff happy.....
and
245/35/19 = 25.8
so you would be going in the wrong direction.
#30
08-11-2009 | 11:49 AM
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Posts: 82
From: Bay area
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Thank you for the feedback. I wasn't sure the guy knew what he was talking about. My suspension and wheel setup was done by a high end shop so I was a little surprised to hear him say that. Could I go higher in rear profile for a better match? Is there a formula to figure out the diameter?