IamCDN

Hey guys,

After doing some forum searching and talking to some guys in here, I figured out that Michelin PSS 275s will fit on the stock 18" rim without rubbing problems. But I am wondering if this is a situation of, "just because you can, doesn't mean you should".

I drive my car pretty hard as I am sure many in here do. What I have noticed is that the back-end feels loose now with these new tires. It feels like the side-wall of the tire is rolling (although I know that isn't what is happening), but it just doesn't feel right at high speeds and with aggressive cornering. I have checked the tire pressure and everything is right where it should be.

In a straight line under load, the PSSs feel amazing. Great traction.

I am assuming that by sticking wide tires on skinny stock rims that the tread has a little bit of lateral play now. I am assuming that all of you guys that are running after-market 19" rims with PSSs are not experiencing the same feeling???

Has anyone else ever experienced this? Is it is a Michelin PSS thing or is it my set-up.

I have a feeling a new set of HRE's are going to be on order shortly!!

Thanks in advance.

bhamg

Interesting observation and most likely spot-on. Yes, your sidewalls will be definitely less stiff using 275's on OE wheels.

Roswell

Sorry to hear ur new PSS feels weird. I guess this is a symptoms of bulgy sidewalls?

Paculdo

thanks for sharing this observation.. im mostly basing my tire purchase on the suggestion of most folks here.. was thinking about going 275 but now leaning towards 265.

linjy2

I went 265 also. 275 just seems to wide for the stock tire and wouldn't handle as good as you noticed.

C63sydney

I went to a tyre shop when I had my stock wheels and the guy at the shop who had a long history in motorsport advised strongly against it for that exact reason he said the tyre would grip well off the lines but through corners would be affected by severe sidewall movement.

c63addix

265 P Zeros, I am glued to the ground even in the rain and helps the rear look flush enough without spacers

gthal

This is the downside of a wheel that is too narrow for a tire (even if the tire will technically fit). The issue would be less pronounced on 19" wheels as the sidewall is thinner. Wear the tires out and put 255 or 265 on the wheels... or, better yet, get new wheels that are wide enough to better support a 275 tire

IamCDN

That's what I figured. Thanks for the info!! It actually feels a little dangerous driving with them on there. I'll think about it this weekend, but I guess this is the push I was looking for to get some HRE's!

Happy Easter everyone.

PatSC23

Have they been broken in already? Im assuming after the first few hundred miles the feel should change

htoudiee

Would love to know if there are 19s versions of the stock 18s that are wider?

slfmde

275 is waaaay to wide for the stock rims. I know people say they run them but regardless a 275 tire is not made for a 9in rim - it's going to roll like crazy.

IamCDN

Yeah, figured that out the hard way!!! Oh well, live and learn.

b16

Recommended rim width for a 275 is 9"-11". Not sure where you're getting your data from.

http://www.michelinman.com/tire-sele...techspec_table

gthal

It will absolutely fit but at either extreme there are compromises. For a 9" wheel, it fits but doesn't support the tire well and you get sloppiness and rollover compared to, say, a 10" wheel.

slfmde

Comment above me sums it up nicely. Even on my EVO which has 9.5 wide rims 275 were still to wide and I went down to 265. Just because you technically can make 275's fit doesn't mean you should.

natman316

CLS63 optional forged wheels look like our 18s but are 19s and wider and forged...but our offset sucks so we cant fit them (i thought about it too)

b16

I ran a 275 RA1 for track days on my stock Evo 17x8 wheels and they worked fantastic.

gthal

RA1 will have a much stiffer sidewall given it is more of a track specific tire. Sidewall flex and roll would be much less as a result.

khmergod

I use 275 PSS. Forum members told me it would last longer than my 255 Conti 3. I think they were wrong. 4k miles and are almost at wear.bar. Contis lasted almost 6k. I don't.drive too crazy on turns because I.sway too much lol, but I think they feel fine.

gthal

That is nuts... my PSS have about 60% tread left and they probably have 6,000 miles on them. I don't drive slowly either

khmergod

What? How? I call hax1!!!1

grane

If you compare the tread width of a 265 PSS to say the Hankook V12s you'll notice the PSS 265 is significantly wider than the Hankook. TireRACk has this information.

Thus you are getting that extra 10mm or so in the 265 PSS that almost makes it as wide as the 275 of other brands. In a PSS the 275 is too wide.

My Cl has 9.5 width wheels rear and the V12s feel mushy inversely as the OP said. A 275 V12 would be a better fit in the rear.

I'm going to stock PSS size all around this summer if we ever get it!

Case1906

I have no problems running 275 Toyo R888s on the stock 18 inchers.

gthal

Stiff sidewalls on the R888 would help with rollover. I love those tires BTW... one of the best streetable track tires around. They are SCARY in the rain and noisy but they are awesome on dry roads.