reyoasian

iTrader: (2)

Hi,

Is it okay/safe to run square tires on staggered wheels on the IS250 AWD? (2009, not the 3rd gen)

Picking up some OEM lobster claw wheels at 18x8 +45, 18x8.5 +50
Planning to run 225/40R18 all around on them

Rear would be slightly more stretch than the front

Would the weight difference between front and rear cause any issues for the differential/transmission?

Thanks

LiCelsior

iTrader: (32)

thats gonna be a decent stretch, im running 225/45 snow tires on those exact wheels and i hate how it looks on the 8.5.

typically if you decide to run a staggered wheel, your rolling diamater is suppose to match with the OEM specs.

reyoasian

iTrader: (2)

Hi,

My OEM are 225/45R17, hence 18" alternative would be 225/40R18.
The OEM wheels that I'm putting on are not my factory wheels, they're from an IS250 RWD.

AJ@TireRack.com

A 225/40 would be my recommendation and this size has a rim width range of 7.5-9". As LiCelsior mentioned, the rear may have a bit of a stretch to it, but the tire will be within spec.

Also, I do have a note that the tire will need to be an extra load tire used with 39psi front, 41psi rear to maintain load.

-AJ

reyoasian

iTrader: (2)

Thanks AJ

Is that considering factory recommended PSI for stock 225/45R17 is 35 front, 38 rear?
With the added weight both front and rear, new recommended PSI is 39 front, 41 rear?

AJ@TireRack.com

You are reducing the air volume of the factory size, which is reason the need for extra pressure and re-enforcement.

Load is always priority 1.

-AJ

reyoasian

iTrader: (2)

Thanks, that's extremely helpful to know!

AJ@TireRack.com

You are welcome.

AJLex19

I have a 2011 IS350 AWD and am looking to replace my stock 17's with stock 18's that came on the RWD model.

Current Setup (All Around): 225/45/17 (8"Width) X 45mm offset

Potential New Setup:
Front: 225/40/18 (8"Width) X 45mm offset
Rear: 225/40/18 (8.5 Width) X 50mm offset

My question is: Will the combination of a wider set of rear wheels plus the +5mm offset work without any issues? Will there be any clearance issues with the edge of the rear rim and the rear strut housings?

Phresh2010

iTrader: (3)

I have 07 is350 wheels on my AWD running 225/40/18 tires. The tears are not stretched that much and you really can't tell. Been running this set up for years with no issues.

AJLex19

I appreciate the info Phresh2010. Are your '07 IS350 wheels staggered with wider (8.5") rears running on +50 offsets? Wanted to ask which tires you chose and if there was any difference in ride-quality after you moved to staggered 18's from the stock 17's?