I would say you should be fine with 225-35-19 and 235-35-19.

I've been running 215-35-19 and 225-35-19 on 19x9 +24 and 19x10+24 for a while with zero issues

 

Thanks man for your help. Do you have a picture ?

 

This is with the road magnet 2" springs.

 

^^^^^ thank you, nice looking car

 

Hey guys, i am thinking of going with this setup.

Front:225/40R18 and Back: 255/35R18

Do i need spacers?

 

That depends on offset of the wheels.

 

Hello, i think the offset is 45. Will they fit my IS250 AWD ?

Here's a link to what they are. It's the original Lexus 18 mags.

http://is.sewellparts.com/accessorie...2009/1883.html

Thanks!

 

Anyone?

Please help!

 

how many people with an AWD are running 225/35/19 & 235/35/19?

 

Ok just to confirm.. I want to make sure I'm understanding this correctly.

Do I want the new wheel diameter to be as close to stock as possible?

OR

Do I want the new wheel diameter between the front and rear wheels to be as close as possible?

I guess ideally, both would be best.

I'm trying to figure out what tires to get for wheels that are 19x9 +36 and 19x10.5 +42.

 

the wheels can be any size, as long as the tires that you put on have as close as possible rolling diameter front and back. offsets don't matter.

just look online for a tire rolling diameter calculator and that will help you out, you can punch in the numbers and it will tell you the difference.
keep it as close as possible otherwise the AWD light will come on.

 

Ahhh okay sounds good. In that case then, the 235/35/19 front and 275/30/19 rear would be best, since there is a difference of less than .10% (even though they are about 3% larger in diameter than the OEM specs). Thanks tbulsara!

 

So using: 1010tires calculator and your setup (245/30/20F & 285/25/20R), the diameter difference is 3.15% and 2.5% (so 0.65% apart). Is this what we should be looking at? I'm new to using this rolling diameter calculator thing and I'm not exactly sure what to look at.

Any help would be appreciated

 

yes, you want to keep the overall circumference difference between your front and rear tires to a minimum.
doesn't matter how wide, or offset, the car cant tell the difference.

it only goes by the overall circumference of the tires.

Hope that helps!

 

Question, if im running the same four tire sizes and wheel size, then i should be okay right? Im not running staggered but would it matter how big or small my tires are...? ill be running 19x9.75 all around.