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Old 07-08-2005, 11:42 AM   #1
pdippel
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Question Steering twitchy after winter/summer tire/rim swap

I recently swapped my winter setup (lo-mileage stock rims and tires) for a summer setup (used 225/45/17 Sumitomo HTRZ II on optional BBS 17s) and my steering is very twitchy. On some roads I can't drive with one hand because the road pulls the car to the left and right. Suspension is stock except for a Perrin rear sway bar and STi lower brace.

Is something wrong? I think my alignment might be a little off (my wheel has been off center since I got it. dealer said there was nothing they could do about it!) but I didn't have any problems with the stockers. Or is it just the stiffer sidewalls, bigger width, and performance tread pattern?
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Old 07-08-2005, 12:39 PM   #2
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Or is it just the stiffer sidewalls, bigger width, and performance tread pattern?
Most likely the reason. I noticed the same thing when I went from stock rims/tires to my 17" P1's with 225/45-17's on them.

Bill
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Old 07-08-2005, 01:21 PM   #3
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it's the difference between the tires .... performance "stiff sidewalled tires" vs. squishy, narrow tires
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Old 07-08-2005, 03:09 PM   #4
pdippel
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So what can be done to get back some straight line stability? Air pressure, alignment specs...???
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Old 07-08-2005, 04:49 PM   #5
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toe-in.
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Old 07-11-2005, 11:46 PM   #6
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Originally Posted by Samirr76
toe-in.
What settings?
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Old 07-12-2005, 02:17 AM   #7
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...my HTRzII's were 'twitchie'....and very sensitive to small alignment changes....great tire for the $$$....but they got so LOUD that it literally drove me out of my mind, and I took them off at a little less than 1/2 tread.
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Old 07-14-2005, 09:43 PM   #8
pdippel
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I bumped the pressures up to 35F/33R and it seemed to help a bit. Haven't tested highway driving yet.
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Old 07-14-2005, 10:58 PM   #9
Samirr76
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more presure helps.

I run 40 psi all around on 225-45-17s
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