Here's the original post about them, you'll see in the first post some pics on a 1st generation G35 sedan, not bad looking IMO
https://www.myg37.com/forums/g37-sed...mo-s-rims.html

 

Perfect, thanks!

 

Thanks for the advice and the welcoming. I had to look up tramlining, turns out there's been a word for that all along Are the G's more susceptible to this? Since I've had mine I've noticed it quite a bit more than previous or other people's cars.

For the tires, I'll probably go with 255/40 or 265/35 then since I'm not a very big fan of the tramlining haha.

Thanks again!

 

One more follow-up question that I'm sure I could find with a little digging, but it should be an easy one. Is there any risk of damaging the AWD system or other areas of the drivetrain if I do go with the larger 265/40 tire size?

 

Going w/ a square setup reduces the risk of AWD issues, but I would try to stay as close to OEM diameter unless you really want that taller sidewall. Shouldn't have a problem but w/ the more complex AWD system IMO it's best to stay as close to oem parameters as possible.

 

+1 on this. I have 265/40/19 +35 on 19x8.5 squared, the tires aren't particularly easy to find and I tramline HARD. But you are right, it does look mean af.


EDIT: And yes the 35 vs 40 series points are legit. I went with the added sidewall because I went one size over max rec. and also live somewhere with horrible roads. So the extra sidewall helps.

 

Do you by chance have a photo of the 265/40 tire on a 8.5" wheel? There's gotta be some serious sidewall bulge there.

 

Yeah, that's why I'm leaning towards the 40 vs 35. Live in the upper-Midwest, so I get to deal with the pristine pothole filled roads

Just curious, with wider wheels (9.5 vs 8.5) does that bring the sidewall height down after they tires are mounted due to the extra "stretch"?

 

Surprisingly minimal with the firehawk indy 500s. I had pirelli p zeros before which bulged a LOT since they tend to run wider IME. I'm at work now but I attached the only decent picture I had saved on my phone that you could get a feel for the sidewall bulge from.



blt will probably have a much better response, and correct me if I'm wrong, but from my understanding the stretch/bulge will only affect sidewall (significantly) if it's above or below the recommended tire width for the rim width. The recommended range tends to be roughly 30mm wide anyways so I don't see that making a huge difference as long as it's within spec.

 

Wow, that doesn't look bad at all! I've seen 255 tires that bulged worse than that on an 8.5" wheel.

Edit: I figured out why those look so good . . . despite being marketed as 265/40, the tread width on the Firehawk Indy 500 is only 8.8". The tread width on the 255/40 Pilot Sport A/S 3+ is actually wider at 9.0". Tire sizing kills me, lol.

 

Yeah, different companies measure differently, so it's really a hit or miss if you're looking for that last millimeter. Another point of comparison, my 265 Hankook RS3s are around 10 inches wide at the tread, with the 265 Federal RSRRs I had previously nearly pushing the 10.5 inch mark. It's kinda dumb.

 

Yep that's exactly it. I believe my p zeros despite being '265mm' were over 10" wide at the tread (I think that's where that value is measured?) while yeah these are 8.8". Crazy stuff. The pirelli didn't even bulge THAT badly though surprisingly.

 

What kind of pressure are you running in those tires?

 

I started off running either 34 or 35 psi but either didn't drive as well. I found some calculations online based on tire dimensions and weight. Calculated the "weight per tire" that OEM tire size pressure was based off, then plugged in dimensions for these tires but pressure required for same weight rating, and came to a number around 32 psi. At 32 psi these drive incredibly well. Canada had a surprise cold spell and I put these on already, and even as low as 1 or 2 degrees in the wet they're performing acceptably.

 

zaz can you link to the calculator?