spacejunk

iTrader: (1)

I'm deciding on whether to stick with stock or go with 235/40 and 265/35 combo. The slightly wider combo is about 0.3" taller front and rear with the same difference in overall diameter compared with the stock setup. It's hard to find 235/40 but it looks like Michelin Pilot Super Sport makes it and is in stock at Tirerack. Any feedback from people with this combo?

clifftrail

iTrader: (9)

I run that combo with Continental DSW rubber. Seems to perform well enough for my style driving. I did have to roll my fenders a little in the rear but I also have TEIN CST coilovers and its about a finger, maybe two off the tire.

UCrazyKid

Why not just run 245/275 like everyone else?

spacejunk

iTrader: (1)

I considered running 245/35 and 275/35 but the difference in diameter from front to back is close to an inch from stock so there will be rake with this setup. Didn't want that. Also there is not much clearance in the back so 275 may rub. Also considered 245/40 in front but it's 0.6" taller up front so that may rub. Finally I think the stock rims are too narrow for 245/275. Wouldn't look right. Leaning towards trying the 235/40 and 265/35 setup. Anyone know of a reputable tire installer in West LA/SouthBay area that are careful with scratching the wheels? I heard Stokes Tire in Santa Monica is good, any others? Thanks in advance.

cremaster

iTrader: (1)

hey OP,

i've been taking my last ride (G35) to Stokes forever to get tires, alignment, and some other maintenance stuff. they are super careful w/ customer's cars; just let them know how **** and meticulous you are about your ride. ask for Jack or Ron and tell them "rob the lawyer" recommended you.

i just had my F realligned there for better front tire wear about 2 months ago myself.

fyi, yeah, they are a little more $$ than other shops but they do quality work and they carry all of the newest machines and whatnot. gl.

UCrazyKid

No, you want to run 245/35/19 and 275/30/19 rear. no issues ~1-2% rolling diameter difference only. Not a problem with clearance.

Here is the 245 on front, no bulge, fits just less than flush.



Here is the 275 rear, sits flush with wheel.


not even close to rubbing or clearance issues at stock ride height.



write up here: https://www.clublexus.com/forums/is-...in-inside.html

flowrider

iTrader: (9)

^^^^IMO, a 285/30/19 on the rear would be a better choice.

Lou

UCrazyKid

You are right, but the 245/35/19 and 285/30/19 combo is not that commonly available in the same tire model. Limits your choices.

spacejunk

iTrader: (1)

Yes, 245/35 and 285/30 would be the perfect setup since it's exactly the same diameter difference front to back as stock. Just don't think the 9" wheel would accept 285. Thank you UCrazyKid for the photos. Anyone that has 285/30 in the rear with rubbing issues. The overall diameter is about 1/4" shorter than stock so that helps. But the width might cause rubbing. Also probably would bulge on 9" wheel.

Thanks Cremaster for the Stokes experience. Cost $35 each to mount and balance. Reasonable. I'm used to the $10 fee charge by shops in the hood but after watching them in action definitely don't want them touching the F.

xjason

anyone have the 245 and 275 combo lowered on tein htechs? Just wanna know if I will need to roll my fenders if I put these tires on.

flowrider

iTrader: (9)

I do The OD is only .2" difference. That difference is more than made up in the tread depth of a new tire to the tread depth of the stock size in a worn tire. No rubbing issues at all.

Lou

Cabinetman

I understand that the tires are the same diameter in the 245/285 setup, but my issue is that now the width ratio of the tires front to back are different. To keep the same 30mm width difference of the stock tires you would need 255s in the front with 285s out back. Running the 245/285 setup should make the car understeer more which isn't optimal.

When I get new tires I want to try 255/35 on the front with 285/30 out back on the stock 2012 wheels. I'm hoping there are no issues with the 255s up front. I know the diameters will be slightly different, but I don't see a problem. A stock BMW M3 with 19" wheels runs 245/35 in the front and 265/35 in the rear which is a bigger diameter difference that the 255/285 setup I want to try.

spacejunk

iTrader: (1)

Thanks Lowrideraz for the info. Doesn't bulge much and no rubbing. Gonna have to consider the 245/35 and 285/30 setup . As mentioned a problem is not too many models in 285/30. Cabinetman: Wow do you think 255 in front will rub?

flowrider

iTrader: (9)

I have reduced some of that understeer with the F-Sport rear sway bar. To me, my car feels pretty neutral and with the wider tires on the rear, it is less tail happy than it was with the stock sizes. Also, IMHO, the stock 225 cross section up front was just too narrow. IMHO, the 245/285 setup is ideal for our cars.

Lou

toky916

Sorry I bit noob at this I have a 2012 what I have read before there 9.5 I can't seem to find the thread smh
So let me get this clear 245/35/19 285/30/19 will have some under Steer ?
Would 255/35/19 F understeer that's if they don't rub .

And how much under steer with 245/285 Enough to get the F sport bar ?