Tribefan
Well-Known Member
- Joined
- Oct 22, 2015
- Threads
- 6
- Messages
- 455
- Reaction score
- 244
- Location
- Waxhaw, NC
- First Name
- John
- Vehicle(s)
- 2017 GT350
No problem. Glad to provide the input. It sounds like you've done a good bit of research and am guessing you'll be happy with your finished product. I just hope for your sake you don't scrape worse than what I do. You may want to invest in some kind of splitter guards for the underside. I wish I had. A few of my splitter bolts underneath are scraped enough that I don't know if I'd be able to remove them very easily due to a lot of the depth to put the bit into to remove them has been scraped away and might not be enough material to grip with the bit.@Tribefan, I really appreciate the input. These are definitely all concerns that are on my mind. I have struggled with this decision. All I can go on is what I read about the experience of others, which I've done A LOT of, until I make a decision and see it for myself.
I originally planned on going with Continental ExtremeContact Sport in 305/325 because they aren't as squared off as the 325 Michelin, but the 305 have been on back order for some time and still don't even have an estimated date.
I went with 295/305 PS4S because those tires on R-spec rims most closely match the geometry of the R-spec 305/315 Cup2s, when section width, tread width and rim width are all accounted for. Actually, they end up with a little less sidewall stretch than the 305/315 Cup2s. Billy Johnson also recommends them because their tread widths match the R-spec rim widths. I take your point on the sidewall stretch and affect on sidewall height. I actually did some math on the change in sidewall height due to stretching between a 295 and 305 PS4S on a 11" rim and came up with only 0.020". Yes, going to a 295 will result in a nominal 0.3" diameter decrease, 0.15" clearance, compared to the 305. And the FP springs will lower it some more...
I think in the end, I will be in the same boat as you. So, my question for you:
Despite the scraping, are you happy with your setup? Would you do anything differently?
Again, thanks for the input. Really appreciated.
I was considering taking my stock 305/35's from the rear wheels and putting them on the front wheels of my Signature set up, that way I'd recover some of that wheel gap and ground clearance. Only reason I'm not doing it is because I feel like the difference in the sidewall height and wheel gap might be too noticeable when compared to the rear wheels. Wish there was a 315/35 or 325/35 tire option I could use in the rear.
As far as my set up, I'm very happy with it, but I haven't tracked the car yet so I can only go by the semi-daily driving to work and back, along with trips to Tail of the Dragon and other NC mountain roads. I will say that the 325 pokes out a little in the rear, but not a lot. I would consider a 315 in the rear next time if it's offered. The only things I don't like about my set up are the increased wheel gap and the splitter scraping on all kinds of things it didn't use to.
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