howler

I have a set of near mint stock rims with new Pirellis from a 2006 IS250 that I would like to use on my 2006 IS350. Will these fit? Will the IS250 wheels sit in the IS350 rear wheel wells the same vs IS250 rear wheel wells? Or, are the rear hubs a different distance apart IS250 vs IS350?

Raybean

iTrader: (3)

They will fit. The 17s should clear the front calipers.

howler

Thanks Raybean. I'll switch the rims out.

edgeucated

iTrader: (4)

We are missing a bit of important information that will allow us to answer your question.

Are the rims from a rwd or awd is250? Is350 requires stagger rims so rims from an awd is250 could cause problems

Raybean

iTrader: (3)

rwd cars don't require staggered rims. its just to help with better traction but by no means required. it will affect your speedometer tho.

howler

The IS250 is AWD with 225/45 17's. The IS350 is RWD with 225/40 18's and 255/40 18's.
Looks like the outside tire diameter is the same between the sets, so the wheel speed/ speedo reading should be good for both vehicles after switching wheels?

BTW: I currently own both cars, but want to sell the IS250 and keep the IS350. I've owned the IS250 for a year, and just bought the IS350.

gveng

keep the staggered 18's on the is350.

howler

Thanks gveng. Just thought I'd ask, hoping that someone might have tried 17" wheels on an IS350 before.

I like the ride with the taller tire sidewall height of the 17" IS250 wheels. They appear to be the same outside tire diameter of the 18" IS350 wheels. I thought it might work if the rims fit without obstruction, and if speedo reading is unaffected.

Jeff Lange

iTrader: (1)

Wheel fitment is the same for IS250 and IS350 for the most part. The main difference is the the front brakes on the IS250 can clear 16" wheels, while the front brakes on the IS350 require 17" minimum. The IS350 came from the factory with 17" wheels (the same ones that the IS250 came with), 18" wheels were an upgrade option (just like they were on the IS250 RWD).

AWD models require the rolling diameter to be the same front and rear, RWD models can be different (from the factory IS250 RWD models came with and without staggered tires in many countries - just not the USA).

In short: yes, they'll fit just fine.

Jeff

howler

Thanks Jeff. Just want to confirm...
Is the rolling diameter the same front compared to rear on the 18" (staggered) IS350 wheels? If so, is that rolling diameter the same as the factory equipped 17" IS250 wheels?

Jeff Lange

iTrader: (1)

Front and rear rolling diameter is not the same on staggered RWD models.

The rears are about 1 inch taller than the front tires.

Factory RWD Tire Sizes:

205/55R16 Front / Rear for 16" Tires (IS250 Only)
225/45R17 Front / 245/45R17 Rear for 17" Tires (IS250 and IS350)
225/40R18 Front / 255/40R18 Rear for 18" Tires (IS250 and IS350)

All AWD's came with 225/45R17 all around, IS250 and IS350.

Jeff

howler

Thanks Jeff!
I really appreciate the info.