Tire fitment question
#1
Tire fitment question
I see there is a wheel fitment guide, but I didn’t see a tire fitment guide. If there is a specific post or thread I should look to, please let me know.
For my AP1, I am getting SW388s in 17"8.5J +55 for the front, and 17"9.5J +60 for the rear. The car has Eibach pro kit springs that I bought back in 2004, with some AP2 oem shocks (that need replacing already). I’m planning to upgrade to the Ohlins DFV coil overs soon, along with hardrace or spoon complete bushing kit (that’s a topic for another day) as part of a refresher.
I’ve been daily driving the car since 2008 without any modifications, just maintenance and relatively minor suspension work on oem wheels this whole time.
What range of tire sizes am I looking at here, and does anyone have any recommendations to share?
Thanks,
For my AP1, I am getting SW388s in 17"8.5J +55 for the front, and 17"9.5J +60 for the rear. The car has Eibach pro kit springs that I bought back in 2004, with some AP2 oem shocks (that need replacing already). I’m planning to upgrade to the Ohlins DFV coil overs soon, along with hardrace or spoon complete bushing kit (that’s a topic for another day) as part of a refresher.
I’ve been daily driving the car since 2008 without any modifications, just maintenance and relatively minor suspension work on oem wheels this whole time.
What range of tire sizes am I looking at here, and does anyone have any recommendations to share?
Thanks,
#2
I see there is a wheel fitment guide, but I didn’t see a tire fitment guide. If there is a specific post or thread I should look to, please let me know.
For my AP1, I am getting SW388s in 17"8.5J +55 for the front, and 17"9.5J +60 for the rear. The car has Eibach pro kit springs that I bought back in 2004, with some AP2 oem shocks (that need replacing already). I’m planning to upgrade to the Ohlins DFV coil overs soon, along with hardrace or spoon complete bushing kit (that’s a topic for another day) as part of a refresher.
I’ve been daily driving the car since 2008 without any modifications, just maintenance and relatively minor suspension work on oem wheels this whole time.
What range of tire sizes am I looking at here, and does anyone have any recommendations to share?
Thanks,
For my AP1, I am getting SW388s in 17"8.5J +55 for the front, and 17"9.5J +60 for the rear. The car has Eibach pro kit springs that I bought back in 2004, with some AP2 oem shocks (that need replacing already). I’m planning to upgrade to the Ohlins DFV coil overs soon, along with hardrace or spoon complete bushing kit (that’s a topic for another day) as part of a refresher.
I’ve been daily driving the car since 2008 without any modifications, just maintenance and relatively minor suspension work on oem wheels this whole time.
What range of tire sizes am I looking at here, and does anyone have any recommendations to share?
Thanks,
255/40/17 rear
this is assuming you don’t want stretch
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91crxSi (10-17-2023)
#3
#4
Lots of options.
"CR spec" tires are
215/45/17 front
255/40/17 rear and have worked well on my stock suspension AP2V2 (MY 2006) wheels for several years.
Likewise standard AP2 tire sizes
215/45/17 front
245/40/17 rear will work well too.
These tire sizes are all within a tiny percent of the sizes of all the OEM (AP1 or AP2) tires so won't upset ABS or Stability Assist in the late cars.
Not all tire brand/models offer the 255/40/17 size but they look great!
-- Chuck
"CR spec" tires are
215/45/17 front
255/40/17 rear and have worked well on my stock suspension AP2V2 (MY 2006) wheels for several years.
Likewise standard AP2 tire sizes
215/45/17 front
245/40/17 rear will work well too.
These tire sizes are all within a tiny percent of the sizes of all the OEM (AP1 or AP2) tires so won't upset ABS or Stability Assist in the late cars.
Not all tire brand/models offer the 255/40/17 size but they look great!
-- Chuck
#5
Site Moderator
Tire fitment guide is a sticky - https://www.s2ki.com/forums/wheels-t...-sizes-326003/
It's mainly for stock sizes, too many variables to have a sticky for non standard sizes/offsets.
It's mainly for stock sizes, too many variables to have a sticky for non standard sizes/offsets.
#6
Site Moderator
Lots of options.
"CR spec" tires are
215/45/17 front
255/40/17 rear and have worked well on my stock suspension AP2V2 (MY 2006) wheels for several years.
Likewise standard AP2 tire sizes
215/45/17 front
245/40/17 rear will work well too.
These tire sizes are all within a tiny percent of the sizes of all the OEM (AP1 or AP2) tires so won't upset ABS or Stability Assist in the late cars.
Not all tire brand/models offer the 255/40/17 size but they look great!
-- Chuck
"CR spec" tires are
215/45/17 front
255/40/17 rear and have worked well on my stock suspension AP2V2 (MY 2006) wheels for several years.
Likewise standard AP2 tire sizes
215/45/17 front
245/40/17 rear will work well too.
These tire sizes are all within a tiny percent of the sizes of all the OEM (AP1 or AP2) tires so won't upset ABS or Stability Assist in the late cars.
Not all tire brand/models offer the 255/40/17 size but they look great!
-- Chuck
#7
Not advising others to do the same, but I would not run a bigger tire on the car/wheels again. 255 on 9” square just looks goofy (to me), with no perceptible benefits on road.
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#8
Site Moderator
#9
Sorry, I took your comment personally.
OP...225 and 255 are the most straightforward. Both will look exactly as stretched on the front and rear. For 8.5 and 9.5, those are probably optimal, with exactly the amount of stretch you want for aesthetic (IMO) and functional reasons.
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TsukubaCody (10-18-2023)
#10
Speaking to the choir here, but a slight stretch is beneficial to performance however excessive stretch takes away compliance. Also degree of stretch will depend on the tire you're mounting. RT660, A052 and CRS are dummy wide and essentially run one size wider than listed. These tires in 255 look barely stretched on a 10.
I'd stick with 225/255 stagger with that wheel setup.
I'd stick with 225/255 stagger with that wheel setup.