Any comments on the turn in, ride and grip?
Thanks for sharing that. I just did some testing on my setup last night and discovered a "corner case" where I have a slight bit of rubbing. I'll update the Dunlop Direzza II post...Got to test fit the new wheel/ tire combo on. Wasn't sure if the Rivals would fit without rubbing. I was mostly worried they wouldn't clear the fender lining in the rear, but they fit with about 3/8" of clearance on the inside rear corner of the tire.
The fronts do rub though. They have good enough clearance for typical driving, but they rub when close to full lock. When turning left full lock, backing off by about 1/4 - 1/2" of rotation gives enough to stop the rubbing. When turning full right lock, backing off about 1 - 1 1/4“ eliminates the rubbing.
There are few times in autocrossing or daily driving where you would turn the wheel this much, about one and a half full turns from center, but it does happen.
FYI, these were on 16x7 wheels with a 42mm offset. Hope this is helpful to some of you.
kinda...I just posted on that thread about a condition where it happened once.Haven't turned a wheel in anger with the new setup yet, just around an empty parking lot and to check clearance. I'm going to start a new thread in the autocross section to talk about how they drive.
Are you seeing rubbing with the Dunlops?
...and more importantly, no shift to third -- saving precious tenths in the critical 0-60 timed runs!Sorry, meant to include in original post:
With the 205/50 being a bigger tire, the top speed in second gear is 60.4 per my GPS, so an extra couple MPH, which was my goal.
That sounds safe, but it really depends on your wheel offset and backspace choices. See my wheel/tire thread for my specifics.if the 225/50r16 rubbed a little bit, is it safe to assume a 215/50r16 would fit just fine? and would a 16x7 wheels suffice? I want to get a high performance four season tire and leave my stock wheels and tires for summer only
FYI, the FiST is not legal for STF, it would be classed in STX I believe....the widest wheel I can in STF.
I think that RTF has been phased out now that the Stock classes have been transitioned to Street (non-R comp tires). I can't find confirmation of that though. The FiST is classed in G-Street though.Hmmm, I am having a bad day with my posts...meant RTF...Road Tire Front.
That is a great shot - I am leaning toward the dunlop - I ran them on my miata and cooper. So for RTF I think I can run a 16 X 7 (stock plus or minus 1 inch - meaning I can run a 16 with the width of the widest 17 that ford sells on the car), plus I can can add some offset. Have not found the wheel I want to go with yet. Would love to go with a RPF1 or something like that, just not sure if they are an option.
FYI, the FiST is not legal for STF, it would be classed in STX I believe.
In theory, I added 20mm of width, then the wheels moved the offset 5.5mm, so that's an extra 4.5mm on the inside an an extra 15.5mm on the outside.
I say in theory, because a 225 from one company may not be the same as from another. This is a picture of the Dunlop Z2 225/45R16 next to a BFG Rival 225/50R16. Both are mounted on identical 7" wheels. The Rival is noticeably wider.
Good eye.Both brands are mounted on wheels? The BFGs don't look like it. Unmounted tires are always wider appearing than the same size mounted.