Newbie question on new tire setup

ChrisSlicks

275 front, 305 rear.

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Hotchkis ARB | Stillen CAI | Art Pipes | Berk CBE | Stillen AP Racing Brakes | AE Performance Oil Cooler | BC Racing ER Coilovers | Doran Control Arms

xbigb4ller69z

275/35R/19 in the front? and 305/30R19 XL in the rear? how would the car be balanced?

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Eibach pro kit/ Stillen sway bars / SPC rear camber arms / F.I. 12" CBE / GTM TT / Southbend clutch stg 3 / ProSport Gauges/ ZSpeed Performance Heavy Duty Concentric Slave Cylinder / Twin Oil Coolers. / Tuned by HP Logic

ChrisSlicks

I've run this setup on the stock sports rims for well over a year and the handling has been great. Street, auto-x and some track driving has been done on this setup. On the rims you are looking at you have an extra 1/2 inch of width so the fitment should be perfect. This information is based on the RE-11 which has a very stiff outer sidewall, your results may vary with a different tire.

I would generally discourage creating a large width differential front to rear as that will throw off the car's natural handling balance.

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Hotchkis ARB | Stillen CAI | Art Pipes | Berk CBE | Stillen AP Racing Brakes | AE Performance Oil Cooler | BC Racing ER Coilovers | Doran Control Arms

xbigb4ller69z

so is 255 / 305 rear combo the best setup for performance/looks ? I have stillen sways right now. I just want to make sure I'm not losing any performane...

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Eibach pro kit/ Stillen sway bars / SPC rear camber arms / F.I. 12" CBE / GTM TT / Southbend clutch stg 3 / ProSport Gauges/ ZSpeed Performance Heavy Duty Concentric Slave Cylinder / Twin Oil Coolers. / Tuned by HP Logic

ChrisSlicks

A 50mm width differential is too much in my personal opinion, you will invite unwanted understeer.

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Hotchkis ARB | Stillen CAI | Art Pipes | Berk CBE | Stillen AP Racing Brakes | AE Performance Oil Cooler | BC Racing ER Coilovers | Doran Control Arms

christian370z

Not ideal, like Chris said you will get a lot of understeer so unless you want your car to push through turns instead of remaining balanced, you should go 275/305 or 265/295.

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-320whp / 259wftlbs-
SP Rays -- RE-11s -- SpecialtyZ Tune -- Swift Springs -- Stillen 25R Oil Cooler -- Stillen G3 Intakes -- Berk HFCs -- F.I. 12" CBE -- Stillen Sway Bars -- Es14 Spring -- INGS+1 lip -- CF Spoiler -- GTR Start Button -- VLED Parking Lights -- PWJDM V2 shift knob

Guard Dad

Wider front tires can sometimes reduce steering precision. How did the 275/35's on the front affect the steering? The 265/295 or 275/305 sizing appeals to my "Bigger is Better" nature so I am eager to hear your feedback.

ChrisSlicks

I think the results may vary by tire, but with the RE-11's the steering is very precise. I was able to consistently win at our local auto-x events in the unlimited street tire class. With a softer sidewall tire I would have some concern of tire roll causing numbness, but it just hasn't happened with this tire. My tire guy hates them though, he always has a battle getting it onto the rim.

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Hotchkis ARB | Stillen CAI | Art Pipes | Berk CBE | Stillen AP Racing Brakes | AE Performance Oil Cooler | BC Racing ER Coilovers | Doran Control Arms