Will the huge 285/35R-19 rear tire fit on a stock BBP rim?
#1
Will the huge 285/35R-19 rear tire fit on a stock BBP rim?
I'm going to try and get the fatter tire for more rear grip. Will that big boy fit on a typical brembo package rim? i think the wheels are only 9" wide not 9.5" like the Laguna / Boss and may not handle the wider 285 / 35 R19.
In the process of stiffening the rear by adding 26mm stabilizer bar, and i think w/o the larger rear tire it will have too much oversteer. Thoughts? Stock is 24mm for the bbp, 25mm for boss.
Thanks!
In the process of stiffening the rear by adding 26mm stabilizer bar, and i think w/o the larger rear tire it will have too much oversteer. Thoughts? Stock is 24mm for the bbp, 25mm for boss.
Thanks!
#3
Originally Posted by 99mstng
go with a 275/35 . . . 285 on a 9" rim would "fit" but I wouldn't run it
also you can do 275 all the way around so you can rotate your tires
also you can do 275 all the way around so you can rotate your tires
however the spring rates are much lower in bbp..
but yea then i cant rotate this hides
Last edited by twistedneck; 8/20/11 at 09:44 AM.
#4
275's are widest you would want to go, even that won't be optimal. Yes a 275 is the max for a 9" rim but it isn't optimal, which would be 9.5". The minimum rim width for most tires in the 285 width is going to be 9.5" with 10" wide optimum.
Dave
Dave
#5
that sounds bad.. what happens when you put a 275 on a 9" rim??
#6
I have a brembo GT i went with P275-40 19" on the stock rims in the back and keep the stock 255-40 19" in the front .I think twice before going up to the 26 mm rear bar.I try the car with the tire set-up you pick first before changing the rear bar .
#8
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What problem are you trying to fix with a 26mm rear bar? I stepped DOWN to a 22mm adjustable because snap oversteer was such a problem for me with the 24mm.
#9
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#12
Legacy TMS Member
If its in an acceptable rim width range then its not so much as bad as it changes the way the tire reacts under a load. Generally speaking it would reduce the lateral stiffness in the sidewall changing the way the tire reacts (slower and softer) compared to a tire where the rim is equal to or wider that than the reccomended fitment. There is also a very minimal effect on the section width of the tire and possibly its contact patch.
At the very least your introducing yet another variable into tuning the suspension
At the very least your introducing yet another variable into tuning the suspension
#13
Originally Posted by jsnyng
What problem are you trying to fix with a 26mm rear bar? I stepped DOWN to a 22mm adjustable because snap oversteer was such a problem for me with the 24mm.
#14
After doing more research it looks like the reason there was a 26mm bar had to do with the extreme grip provided by the 285 tires on Laguna, along with its x-brace it had so much rear grip they needed to loosen it up by adding a huge rear stabar.
I will stick with a 25mm boss rear stabar to replace my 24mm and hopefully that will add just a little bit of oversteer and body roll reduction to make the car easier to toss w/o going into 'snap oversteer' ouch.
The quote below from chief engineer essentially spells this out. Whats up with that ultra grippy rear tire?
I will stick with a 25mm boss rear stabar to replace my 24mm and hopefully that will add just a little bit of oversteer and body roll reduction to make the car easier to toss w/o going into 'snap oversteer' ouch.
The quote below from chief engineer essentially spells this out. Whats up with that ultra grippy rear tire?
“The R-compound tires on the Laguna Seca are so sticky we had to really work on the rear suspension tuning to make sure drivers can get the most out of them,” explains Pericak. “The rear stabilizer bar is the largest we’ve ever installed on a production Mustang – including any SVT product. The rear spring rate was also maximized to work with the massive rear tires and balance the car for outstanding lap times.”
#15
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Every 2003-4 SVT Cobra left the factory on 9" wide rims wearing 275's at all 4 corners. I trust that SVT wouldn't have done so if it was a bad idea.
I'll be running 275's on my '11 BBP GT when the factory tires wear out without any worries.
I'll be running 275's on my '11 BBP GT when the factory tires wear out without any worries.
#16
Legacy TMS Member
All about the G's and being able to get the power down without seeing it going up in a blue haze as you get on the throttle real early.
Last edited by bob; 8/22/11 at 01:50 PM.
#17
Legacy TMS Member
The 03 Cobra came with 275/40R17's on 9" wide rims ... I have one in the shop now and paid close attention to the tire/rim sizes listed on the warranty (OASIS) printout when I printed the Repair order this morning ... factory-fit was 17x9 rims, 275/40R17 tires.
#18
Legacy TMS Member
Even in the case of the Terminator, a 17 x 9 rim was sub-optimal as the measuring rim width used at least in the case of Michelin was 17 and 19 x 9.5 rendering a section width (from sidewall to sidewall) of 10.9" which could be thought of as providing the best compromise between ride comfort, road holding and steering response. Going toward the 9 inch rim favors ride comfort over road holding and steering repsonse. Going to 10-11 rim will sharpen steering repsonse and increase lateral stiffness at the cost of ride comfort.
Thats why you see the GT500 and Boss riding on 255/40R19s with 19 x 9.5" wheels up front.
#20
Legacy TMS Member
I use 1010tires.com a lot for their tire size calculator ( http://www.1010tires.com/tiresizecalculator.asp ) and they list rim width range of 9-11" for a 285/35R19 tire ...
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