Please let me know what size R6's you guys are going with (996TT). Front choices are 225/40/18, 245/35/18 or 245/40/18. I was going to go with the 245's in front, and considering I ususally go with 235/40/18's, I thought it may be better to get the 245/35's to help prevent rubbing... Please let me know. Also, for those of you that use Hoosiers on the track, what tire pressure do you start with cold (and where do you want them to be hot)? Any help would be appreciated! Thanks!!

 

You want 46820 P245/35ZR18, and 46840 P285/30ZR18

The diameters are the closest, and the right for stock
wheel widths. You'd want low 40's psi hot.

 

Thanks! But, my wheels are 8.5" in front and 11.5" in the rear (I have the RUF 3 piece wheels and the HRE C21's) I should have mentioned that in the initial post. Still think 285's, or should I get bigger. I usually run the 235/40/18 and 315/30/18 MPSC's)....

 

I run 245/35R18 up front and my car is low. No issues with rubbing. They are on 18x8.5 44ET wheels. For the rear I run P315/30R18 on 18x11.5 ET44.

No issues with rubbing at all.

Great setup! I was able to keep temps between 40 and 44 and they were WAY sticky!!!!!!!

 

Thanks for the info. What tire pressure did you start with to end up with 40 and 44 hot??

 

Then you might want:

46825 P245/40ZR18
and
46846 P315/30ZR18

 

Thanks!!!!!!!

 

LF 32, RF 34, LR34, RR 35

Our track (PIR) beats up the left sides in general.

 

Good info - I will adjust for our track accordingly. Thanks alot for the help!

 

245/295

over 40 hot is very hot.

start in 30's and keep in 30's (30/32 == 33/35 or 34/36)

MK

 

Woodtster why do you say that? We might have conflicting info. My tire engineer recommeded 40 to 45 for the hoosiers on my car. I know the subie guys try to get 52 in theirs.

 

I have 19 inch and doing 40/44 R6 tires

 

Hoosier recommends the optimal hot pressure as being around 40-44 on the R6. Past compounds were different. I get the best stick at those pressures and start at 32/34 cold on my TT and then check temps with a pyrometer and bleed accordingly

 

Which TT? 2007? if so which dimension tire are you using since they dont have the exact dimension as your OEM?

 

I run 245/35/18 front and 305/30/18 rear Hoosiers on my 07 997TT. The 305/30/18 is actually a VRL compound - Viper Racing League - which is almost identical to an R6. The tire heights are shorter but the ratio of front:rear is within 1% of the stock tire sizes and the diff and electronics are unphased.