It's about that time to buy tires for this season of autocross, and I'm looking into running a square set up. Last year I ran 225/255 Star Specs in RTR with a stock CR bar. This year, in B Street, I'm planning on running a Gendron Monster bar, but I'm on the fence with regards to tire sizing. I'm planning on going square, but is cramming a 255 on the 7" wide fronts do-able without ruining steering sharpness and feedback? I've seen past threads that discussed running 245 and 255 square Star Spec's with some positive results. My plan is to run Z2's which I've heard pinch better than RS3's and Rivals due to a stiffer sidewall. A 245 square set up is less of a pinch, but still pretty substantial. The 245/45 option wont be as large of a pinch, and it will give me some extra MPH at the top of second which could help out on longer, straighter courses so that may be worth looking into as well. Anyone have some first hand experience they'd like to share? Thanks.

 

i ran a 245/255 set up. worked well for me. check my sig link for my autocross starting thread.

 

i ran 245 and 255 as well. It worked good but I did miss the crispness of the small front tire. I would have to try them back to back though to get a good comparison instead of going off memory. This year, kinda thinking of trying this r1r tire out though in the 235 size all around.

 

R1Rs dont last too long. awesome for rain from what i heard. i had them in the regular CR sizes, they did do well during the cold days.

 

I was thinking that they would hold me over till the rs3 v2 is out which would be good. We do have super cold mornings till june so depending on my run group time it might work out. I might give them a shot

 

how cold does it get in nevada? let me know how those R1Rs do and how long they last.

 

I have went to events in july and august and its been in the 30s upon arrival. Pretty common to get that low in the summer. We have the widest range of temps in the "high desert". 30 in the morning and 90 in the day is not uncommon.

 

245/255 RS3... UT cold can = squirley... especially if not scrubbed, did inadvertent drift around corner on my residential street. Saved by VSA.

 

some good stuff there, thanks.

what tire were you running with the 245/255 setup?

 

i actually ran a mismatched set. My 225s were shot so I put my friends 245 Z1's on the front and had the 255 RS3's on the rear.