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THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCH285/35/18 on my C2?
Leading reported evidence
Install 235/40/18 and 285/35/18 michelin pilot sport 4s
Performed · outcome unconfirmed
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1
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Performed · outcome unconfirmed
I just installed 235/40/18 and 285/35/18 Michelin Pilot Sport 4S on my 996.1 last week and haven't had any issues with rubbing.
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Suggestion
We also have a C2 with none of that electronic junk and will experiment to see if we can use spacers by temporarily placing different thickness washers behind wheels to check for rubbing issues.
Leading evidence: 'Install 235/40/18 and 285/35/18 michelin pilot sport 4s' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check rubbing issues' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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Install 4 years ago and 30,000 miles, wear bars close
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No successful repair reported for this finding.
0
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Performed · outcome unconfirmed
Installed 4 years ago and 30,000 miles, wear bars close but not yet reached.
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Performed · outcome unconfirmed
I ran the PS4S and really liked them - both on the track and the street.
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Suggestion
We also have a C2 with none of that electronic junk and will experiment to see if we can use spacers by temporarily placing different thickness washers behind wheels to check for rubbing issues.
Check tire age tires lately have been going bad fast
Suggestion or failed attempt
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Suggestion
I think the separation may have been caused by under inflation also check the tire age tires lately have been going bad fast after 5years
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Check rubbing issues
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Suggestion
We also have a C2 with none of that electronic junk and will experiment to see if we can use spacers by temporarily placing different thickness washers behind wheels to check for rubbing issues.
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Suggestion
Despite all the positive feedback from others (most of them have changed front dimensions too, mind), going to 285/35 at the rear whilst keeping the front tyre size (diameter) the same you'd want to make sure you do not run into the Traction Control trying to speed up the rear wheels on decel, see here:
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Suggestion
Hi, I just ordered the same tire combo you just mentioned; can you tell me what you mean by the 'rear is slightly shorter?' I'll change the order if it's not going to look right.
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36 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
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"00 C2 Cab, no PSM. I've got 18" Carrera rims, 8" front and 10" rear with 285/30/18 on the rear. If I can go to 285/
35
on the rear I'll have more options to choose from. These are ~26" diameter vs ~25" current. Anyone run this size tire and how is the clearance? Would it be ok to keep the fronts at 225/40 (~25" diameter)? Front to back difference would be 4%.
We put on larger tires than stock at
235/40/18 front and 295/30/18 rear. Rear is slightly shorter than front and it doesn't look right, when they wear out we are planning on same size front and taller 285/35/18 rear. We also have a C2 with none of that electronic junk and will experiment to see if we can use spacers by temporarily placing different thickness washers behind wheels to check for rubbing issues.
I know you've changed a lot of things since this photo was taken (BBS wheels, Cup wing & engine lid to name a few) but I still think your car looks great in this photo!
Thanks Bill ! Me too - if I bought another one to leave stockish and drive around, it would look exactly the way it does there but with a ducktail... and that�s it. They really are pretty cars, especially from the back.
I�ve been running 235/40R18 front & 285/35R18 rear, for the last 35,000 or so miles. I have the M030 spec springs and no real rub (if I hit a bump, at full-lock, the front tire might kiss the fender liner lightly).
Works great, and opens up much more variety of choices.
thanks and nice ride. I sub'd your youtube. Going to 285/35 on the back offers many more options. Mich PS All Season 4's for example, standard on the base Corvette should be good enough for my "spirited" street only driving.
Yeah, I'd like to keep the fronts stock size.
Costco has the best deals but Discount Tire will happily mount a tire to see how it looks and if it rubs, etc, then take it off to try another one.
35k miles is a pretty good trial
. That's what I'm looking for. Interesting, I've got a 20 year old book "Porsche 911 Buyers Guide" that shows the '99 and '00 came with 17's and a note: "Porsche advisory against using 18's as it could cause chassis failure".
Our stock size was 225/40/18, and we want largest tires possible went up to 235/40/18 with very slight rub inside wheel well only at full lock. Someday will heat up and reshape wheel well liner to eliminate all rub, but not really an issue.
These General G-Max were highly rated at Tirerack.com for grip and noise, available in many sizes, and have about twice the wear rating of Porsche approved tires. We have 13k miles on them and they are hardly worn.
Thanks for the sub ! up to 342...which I have to say is more than I thought I would get when I started putting videos up ! really appreciate it.
IMO the 285/35 is the "right" tire for there back. The taller sidewall is a better choice with all that weight back there and it looks the business. You can stick with stock sizing in the front and will have a nice setup. I ran the PS4S and really liked them - both on the track and the street.
I actually just sold the whole setup pictured above - spacers and all to another forum member, hopefully he will enjoy as much as I did and post plenty of pics
I just installed 235/40/18 and 285/35/18 Michelin Pilot Sport 4S on my 996.1 last week and haven't had any issues with rubbing. Currently on stock suspension so there's a good amount of gap, coilovers are going on soon but from what I'm reading I don't think 285's are going to cause an issue.
Despite all the positive feedback from others (most of them have changed front dimensions too, mind), going to 285/35 at the rear whilst keeping the front tyre size (diameter) the same you'd want to make sure you do not run into the Traction Control trying to speed up the rear wheels on decel, see here:
https://rennlist.com/forums/996-foru...d-but-why.html
Not an issue if your c2 only has ABS (or with TC OFF).
I don't have first-hand experience with 285's but as written in the thread linked above I had this issue with 265/40 vs stock 265/35 combined with stock front dimension 225/40, all 18"
Thanks for this. Not a lot of 285/30 choices is the only reason for me going to "35" but stock 225/40 availability is not a problem so I did look into keeping fronts stock since I don't have PSM. Based on responses and other reading that there is no rubbing, etc with taller tires I may go to 225/45 front and this will make front and back diameter 26". Still, I kinda prefer the shorter sidewall on the front for the handling.
What did you end up doing? I'm looking at the same dilemma in wanting to run PS4s but they're only available in 285/35 as near as I can tell. Less worried about rubbing than I am the traction control losing it's mind.
I ended up sticking with 225/40/18 (8" rim) on the front and 275/35/18 (10" rim) for the rear. We mounted the 235's but they rubbed quite a bit. I think the Mk1's fender liner is more likely to rub than Mk2's, regardless, for my driving I'm not trying to get every cm of width so I just stuck with stock. Not going up to the 235 I dropped to the 275's in the rear and this matched the front/rear diameters to within 2/10s inch. Also, the speedo now reads only 1mph over at 70 whereas before with my 285/30's it was 4mph over. The ride is great but I replaced 13 year old Sumi's so anything would be an improvement.
For anyone else interested in the tires, they are the Michelin All Season 4S and, after 2k miles, so far so good. Of course you wouldn't want to get near the track with them but for the back roads and coastal cruising they are fine and should last. They came stock on the base Corvette so that's gotta be good, right?
This is good to see. Looks like you're running Apex SM-10 wheels with an 11" rear rim? That's the size I'm considering in future for additional side wall. Any side shots?
APEX Wheels
SM10
Front: 18x8.5� ET42 with MPSS 245/40-18 tires
Rear: 18x11� ET36 with MPSS 295/35-18 tires
OHLINS R&T
No spacers
No fender roll
No rub
No codes
I'm liking this fitment a lot! Thanks for sharing. Same wheels here just different offset in rear for narrow body but 295/35 looks perfect IMHO on there.
Hi, I just ordered the same tire combo you just mentioned; can you tell me what you mean by the 'rear is slightly shorter?' I'll change the order if it's not going to look right.
fronts 235/40/18 18x8.5 53mm offset
rears 295/30/18 18x11 63mm offset
I have a 2001 C2 cab
295/30/18
will fit with enough negative camber...even with 11" 45ET wheels:
Even
315/30/18
tires will fit:
Up front, you can fit up to 275/35/18 tires, although I don't have a pic handy. Here, the car has
265/35/18
r-comps (which are about as wide or wider than non r-comp tires):
Tell me more about this 275/35 front! I was always under the impression a 255/35 was about all you were getting under the front of a 996. Is that Fiske a 9" or 9.5"?
Our General G-Max the tread separated from the cords at inner edge and rapidly deflated on the freeway. Super blessed car didn't spin out and only light scratches on fender and Sport Classic II wheel. Installed 4 years ago and 30,000 miles, wear bars close but not yet reached.
Current size of 295/30/18 is smaller diameter than 235/40/18 fronts and doesn't look good. Taller 285/35/18 might be ideal size for a street driven Mk II C2 with stock suspension, no PSM or traction control, no spacers, and 10" ET65 rear wheel.
Tire Rack has Continental Extreme Contact DWS 06 Plus tires in that size for $290. They are very highly rated for traction and low noise, have a treadwear rating of 560 which should go tens of thousands of miles past many tires used on 996s, and are speed rated for 186 MPH. May order these today.
I think the separation may have been caused by under inflation also check the tire age tires lately have been going bad fast after 5years
I also second continental great all around tire
but I’m running the general and very happy with price and performance
285/35ZR18 PS4S on the rear of mine lowered on coils with Fuchs and spacers. Love the taller tires and I don�t think it would look as good with shorter tires.
