It's a combination of wheel diameter, width, offset, tyre sizing and suspension lowering. What most of us try to achieve is to get the wheel to sit flushest to the fender edge as possible. The wheel that is too much sunken in the fender will not look nice in the eyes of car nuts. The degree of flushness depends on personal taste though. One's opinion on flushness might differ from others

If you look through "aftermarket wheel thread" you will understand and know what you want.

In my humble opinion, you should start searching for pictures of ISs with
19x8.5 offset 40-35 front paired with 225-35-19 or 235-35-19 and
19X9.5 with the same range of offset and 255-35-19 or 265-30-19 or 275-30-19
lowered on various amount of ride-height.

From there, you then adjust the combination to your taste.

Remember19X8 +29 = 19x8.5 +35 = 19x9 +41= 19X9.5 +47 in terms of flushness but will yield more and more backspace measurement.

Now speaking of wheel and tire matching.

19X9.0 +41 with 235-35-19 will provide more fender clearance than19X8.5 +35 with the same size of tire because of more slant sidewall. If you don't want slant sidewall look (read "Stretched" tire) then you might have to go with 19X8.5 +41 with 235-35-19 to avoid tire-fender interference.

Or you can run 19X8.5 +35 with 225-35-19 with quite similar fender clearance effect but the overall diameter will be lower than 235-35-19 and so do the rim-protection effect of the tire's thinner sidewall.

Now when it comes to suspension lowering. Rule is: the more you lower, the more your wheel will look sunken it. This is because the natural arc of suspension path when compressed. So if you plan to slam your car, you might have to choose more aggressive offset (lower value such as +30 to +22) to compensate with that arc effect.

Really sorry if my explanation sounds confusing because I am not good at explaining things but the above is my understanding.

 

Thanks so much for your response! Really really helpful! I will start with pictures first then
My car will be dropped on H&R, 1.3 front and 1.4 rear. It's not too much of a drop, so should I go with just 18" ? I commute daily so I don't want to be too low..

Thanks!

 

no issue just showing an update and was just curious if I SHOULD even though its not rubbing... you know in case of any spontaneous future event..

 

18" with H&R drop is OK but it will not looks better than 19" (again, in my humble opinion). You will get better functionality with 18" though, especially if you use your car everyday on generally bad road. It is just a game of trading-off between Form VS Function. Most of the time, you have to compromise one for another. It's your call sir...

 

Hey guys will IS300 17s clear the IS350 brakes? Will those wheels work on the car? Looking into a set of 17s for snow tires. Thanks.

Also will ES350 or 3g GS wheels fit?

 

Do you guys think 19x8.5 +30 F and 19x10 +38 R with eibach pro kit will rub?

Do you think I will need the fenders rolled?

 

I'm thinking of getting wheels in these sizes:
18x9.5" with 35mm offsets Front
18x9.5" with 22mm offsets Rear

Can I run these sizes with just a fender roll? I don't want to do any Fender mods or pull. Maybe just stretch tires?
I'm lowered on Megan EZ Street coilovers with 1/2 finger gap.

 

3GS wheels should fit.

not sure about ES3350 or IS300 wheels.

depends on your proposed tire sizes.

depends on your proposed tire sizes, but assuming you went w/ something close to oem-sized tires...

yes on rolling your fenders. by doing so, you'll get a "roll-pull", meaning the natural action of rolling the fenders will pull them out slightly.

you'll also need to look into shaving down the rear fender tab at your ride height, and possibly remove the bolt from the front fender tabs.

it's the combination of low ride height + wide wheels + semi-aggressive offsets.

 

researched everywhere i feel and haven't came across anyone running xxr wheel on is350....

need to know if i lower on Road Magnets if I can go

18x8.5 front +35
18x10 rear +25

and what tire size i would need to go without work? fender roll?

 

18x8.5 +35f
18x10 +20r
im lowered on megan coils.... will these work? also what kind of tires would you recommend? I'm already planning on running a 225/40/18 up front but i have no idea what to do in the rear? also what kind of fender work is recommended?

 

i'm sure those wheel sizes were addressed somewhere in this thread. have you tried searching through the thread with "8.5" and "+35" as your key words? just asking.

but see below.

what a coincidence, that you and another forum member both were looking at (almost) the same wheel specs...

225/40-18 works fine for 18x8.5 +35. it shouldn't require fender mods.

you'll need a roll-pull for the rear and shave the rear fender tabs down. i don't think 255/40-18 will give you the clearance you'll need after all that's said and done with your rear fenders, so try 245/40-18.

 

Varrstoen 2.2.2

19x 9.5/10.5 +22
I'll be running 225/35-19 and 265/30-19.

Dropped to no fender gap, fenders rolled.

Will it rub? :O

I'll consider pulling fenders if absolutely necessary.

 

start considering it.

though if you run 245/35-19, you should stretch the tires enough to clear the outside edge of the fender.

 

Questions on tires:
So my wheels are as follows:

F 19 x 8.5 +34
R 19 x 9.5 +34
Drop on H&R springs 1.3 front and 1.4 back

What tire size can I run with no modification needed.

thanks

 

I've only come across two people running XXR's on their ISx50. I'm looking to as well. Ok, question for all the fitment guys: Will 19x8.5+15f / 19x10+20r fit? Don't know if this offset will clear the 350 brakes or not. Possibly running 225/35f and 255/35r around the wheels. Help is greatly appreciated