The Official Wide Tire Thread
Sep 29, 2015, 01:27 PM
#707
Yes, but considering the front of a stock carries about 1000lb per tire we aren't even close to that.
An SSM miata has about 550lb per corner and runs 275, which is 550/275 = 2.0lb/mm tire. My evo (910lb front corner weight) would need a 450mm tire to have that same ratio.
Of course that's just from a load perspective. Width is another thing to consider but all said and done, as big as feasible is faster.
An SSM miata has about 550lb per corner and runs 275, which is 550/275 = 2.0lb/mm tire. My evo (910lb front corner weight) would need a 450mm tire to have that same ratio.
Of course that's just from a load perspective. Width is another thing to consider but all said and done, as big as feasible is faster.
Sep 29, 2015, 02:27 PM
#709
EvoM Guru
iTrader: (1)
An ok comparative example (sort of) would be a Nascar cup car. 3500lbs with driver, relatively low down force cars (especially on road courses where speed are low). They run a tire that has 11.5in tread width. Good year claims the right front tire sees about 4000lbs of load at most of circle tracks tracks...
Sep 29, 2015, 08:33 PM
#712
EvoM Guru
iTrader: (1)
18x9.5 +35 konig milligrams. 265/35r18 Bridgestone RE11's. All kinds of grip, more grip than the 255/40r17 Dunlop Z2's I had before. Probably thanks to the increased height AND width giving a bigger contact pstch. I still want to do a rear sway bar, car pushes if you stand on it and its below the boost threshold. Might also need some tweeking in the ACD tune.
Last edited by letsgetthisdone; Sep 29, 2015 at 08:36 PM.
Sep 30, 2015, 07:30 AM
#713
18x9.5 +35 konig milligrams. 265/35r18 Bridgestone RE11's. All kinds of grip, more grip than the 255/40r17 Dunlop Z2's I had before. Probably thanks to the increased height AND width giving a bigger contact pstch. I still want to do a rear sway bar, car pushes if you stand on it and its below the boost threshold. Might also need some tweeking in the ACD tune.
Sep 30, 2015, 07:59 AM
#714
EvoM Guru
iTrader: (1)
Car has a 60/40 weight balance as it sits. Lifting the front didn't help very much with that when we had it on the scales. It also didn't noticeably affect handling..
Sep 30, 2015, 08:12 AM
#715
Kicking this thread back from the dead.
A few pages back I detailed what I did to get 275/35/18 Hoosiers on my IX with 18x10.5 wheels. Picked up a set of BFG R1S (also 275/35/18) scrubs in really good shape to try. They are about an inch wider than the 275 Hoosiers. No joy.
Rubbed inner fenderwell and against the rolled and pulled fender in the rear (mild pull). All into the fenders in the front (rolled/cut/pulled). Can't set the fronts in any further due to coilover clearance. Already have the RTErnie rear arms, but can't move in anymore due to hitting inner fenderwell.
Anybody else run the big BFG's with success? Or do you drop down to the 265/35/18 BFG (which is still a little wider than the 275 Hoosier)? Does the 265/35 fit? Or is it time to mutilate fenders?
And don't even mention the 285/30, NASA classing issue with power to weight penalty above 275.....
A few pages back I detailed what I did to get 275/35/18 Hoosiers on my IX with 18x10.5 wheels. Picked up a set of BFG R1S (also 275/35/18) scrubs in really good shape to try. They are about an inch wider than the 275 Hoosiers. No joy.
Rubbed inner fenderwell and against the rolled and pulled fender in the rear (mild pull). All into the fenders in the front (rolled/cut/pulled). Can't set the fronts in any further due to coilover clearance. Already have the RTErnie rear arms, but can't move in anymore due to hitting inner fenderwell.
Anybody else run the big BFG's with success? Or do you drop down to the 265/35/18 BFG (which is still a little wider than the 275 Hoosier)? Does the 265/35 fit? Or is it time to mutilate fenders?
And don't even mention the 285/30, NASA classing issue with power to weight penalty above 275.....
Sep 30, 2015, 09:53 AM
#716
A bunch of us have run through a set or more of 286 BFGs. My fenders are pulled ~0.5-0.75" and with the RPF1s w/20mm spacer up front I just got the usual fender liner and inside fender well rub. Not enough to damage anything but enough to polish a couple areas.
285 hoosiers on 10.5s fit like a dream compared to the BFGs, they run BIG. Ill be trying out the 295 A7 for next year since the 285 wasn't available when I needed to order contingency.
285 hoosiers on 10.5s fit like a dream compared to the BFGs, they run BIG. Ill be trying out the 295 A7 for next year since the 285 wasn't available when I needed to order contingency.
Sep 30, 2015, 11:42 AM
#717
Already at 3.6F and 2.1R and on most courses this is giving good results. Camber won't help the space between my spring perch and fender. May just be heavy fender mod time.
Yeah, everybody tells me the 285/30 is an easier fit than the 275/35. But trying to stay at 275 for the NASA PWR adjuster. I've got 275/35/18 Hoosiers all worked out. No rubs, no issues. But as you said, the BFG's are huge.
A bunch of us have run through a set or more of 286 BFGs. My fenders are pulled ~0.5-0.75" and with the RPF1s w/20mm spacer up front I just got the usual fender liner and inside fender well rub. Not enough to damage anything but enough to polish a couple areas.
285 hoosiers on 10.5s fit like a dream compared to the BFGs, they run BIG. Ill be trying out the 295 A7 for next year since the 285 wasn't available when I needed to order contingency.
285 hoosiers on 10.5s fit like a dream compared to the BFGs, they run BIG. Ill be trying out the 295 A7 for next year since the 285 wasn't available when I needed to order contingency.