I was thinking of going with 19x8.5+30 in the front and 19x9.5+35 on the rear and someone told me that i need spacers for my ‘16 350 to clear the callipers. was just wondering what tire size to go with this set up. also planning to go on rsr superdown springs. so basically what im trying to ask is will this setup work with the springs and if not then what should i do

 

Welcome to the forum!

The front 19x8.5 +30, based on the specs only, will be fine for the front with no spacers. Of course without knowing what rim it is, there is no accounting for spoke design in clearing the calipers.
For the rear 19x9.5 +35, some have reported rubbing when lowered and some have been fine. It seems to be hit or miss.

Tires I would recommend 225/35/19 and 255/30/19...since the goal is to clear the fender in the rear.
If the rear rim was offered in a little more offset, like +38 to +42, the I would suggest larger tires like 235/35/19 and 265/30/19.

If the plan is to go with Superdowns I would suggest a different route and go with coilovers.
At the drop that Superdowns provide you may not be happy with the ride quality after...of course that is subjective to each driver. However the ride quality is what partly makes the vehicle what it is.
Also with the coilovers you can level out the drop and make any fine adjustments should you run into any rubbing in the rear.

 

i wanted to run esr cs11

 

Rims like the ESR CS11 that have a notable lip and flat face don't fit well on cars with big brake calipers...I can see why spacers were recommended.
The rear rim won't be an issue for caliper clearance as the calipers are small, but the front will likely need spacers...I'm willing to bet it will definitely need spacers.
Refer to this post about the ESR SR04: https://www.clublexus.com/forums/is-...l#post10978332

 

Ok so i decided to run with the original plan of 19x8.5+30 with spacers and 19x9.5+35 with spacers. Now I don't know what tire size to get and the car will be lowered on rsr superdowns.

 

You won't need spacers for the rear and you can't use spacers in the front.
The rear calipers are small, there won't be a clearance issue between the rim and caliper...your only concern is the rim and the fender.
The front is already going to be flush with a 19x8.5 +30...adding a spacer more than 5mm will push the wheel outside the fender...and if the fitment is anything like the ESR SR04, you'd need a 25mm spacer at least...at that point lowering the car isn't an option without a camber kit...and at that point the tires aren't going to last very long...at least not the inside of the tires.
Have you considered any other rims?
Have you had a look at this thread? https://www.clublexus.com/forums/is-...exclusive.html

 

Im so confused. I was talking to someone who was running the exact same wheel but with 19x9.5+35 all around and he told me that he had to run 15mm spacers all around cause it wont clear the is350 brakes. the only difference is is that he is running stretched wheels and is running on tein coils.

 

i lied. the person i was talking to actually had a is200t but i thought he had a 350. welp there goes my plan LOL. its looking like i cant really force these cs11's huh

 

The IS200t and the IS350 have the same brakes, so wheel fitment would be the exact same.

For the 200t that is running 19x9.5 +35 all around, I doubt he needed spacers for the rear...the rear brakes are small and don't protrude beyond the hub surface where the wheel mounts...it's possible he just put the spacers for aesthetics, or to even out the fact that he needed spacers on the front. It would likely look weird if the front was spaced out 15mm further than the rear.
Because you want to run a 19x8.5 +30 in the front it doesn't mean a 15mm will also work...it might, but likely you may need a slightly larger spacer.

And when it comes to stretched tires, that's where it's up to you.
Personally I only give suggestions on tires that are safe to fit based on the tire manufacturers specifications. For a 19x9.5 rim the minimum size tire you should run on an IS is 255/30/19.
If the 200t is running smaller tires, then it's not safe for the road as per the tire manufacturers recommendations...and really when he hits the first big juicy pothole he'll understand why.
Given the fact the 200t rims effectively now have the specs 19x9.5 +20 all around, there is not way he is running a 255/30/19 tire.
If it's a show car that's a trailer queen, then go for it...stretch the tire til it hurts lol! But for something you drive on the road everyday...

 

are there any other size that these wheels offer that i can run instead? maybe a 19x9.5+22 or a 19x10.5+22 or staggered of both mentioned above?

 

With the offset, the lower the number gets the further the rims moves to the outside of the vehicle...going with a +22 will make the poke of the wheels even worse.
Unfortunately with this style of wheel the objective is to give you that phat lip...and the best way to do that is to have a flat face and low to mid-range offsets.
Because of that design in mind, no matter the offset you get you will always need spacers in the front at least...I like i mentioned before, the balance the look of the rear you will also need spacers.
If they offered a high enough offset, then you could add a spacer and use proper sized tires and not worry about rubbing of any kind...but they would need to offer a 19x8.5 +50 in order for you to run a 20mm spacer a proper sized tire (225/35/19 or 235/35/19).
Unfortunately a 19x8.5 +50 wouldn't have much of a lip, which is completely opposite of what the rim design is trying to achieve, and likely the one thing that attracts buyers to this style of rim.

 

so basically what you're saying is that it's kinda impossible to run these wheels? Do you have any other wheel with like the same design idea? I really like rims with that lip and it doesnt even need to be that phat. I also like that bbs lm/lm-r type look as they are my dream wheels.

 

Found an image on google of a '14-'16 F Sport running a set of these. Webpage suggests it's on 19x8.5 and 19x9.5. But the site doesn't list the exact offset, nor does it say what the tire specs are on this car. Looks like the rear tires might be stretched quite a bit too... as Sasnuke suggested.

Not sure if it's a possibility (with ordering or fitment), but I'm wondering if you could run the 19x8.5 square. That might help to cut down on the tire stretch issue.

Image source: https://audiocityusa.com/shop/19-Sta...tyle-Rims.html

 

how do i know if someones setup has stretched wheels? for example with this set up: 9x8.5 +30, 19x10.5 +22 : 215/35/19 and 235/35/19

 

This is the rim specs for the vehicle in the pic: 18x9.5/10.5 +22 (EDIT: It can be found on ESR's Facebook page, unfortunately the link is not working)
I'm not sure what the tire sizes are, but something struck me as odd about the pic...the front calipers. At first glance it looks like it has the big calipers found on the IS200t/IS300/IS350...but upon a closer look the caliper doesn't look right.
I almost think this is an IS250 with some kind of caliper cover on it for appearance purposes.

It looks like an IS200t/300/350...but is it really.

If this was an IS250 then the rims would have a much easier time of fitting as the 250 front brakes have small floating calipers.

You can tell the rear tire is stretched for sure in the original pic posted above as it looks like the fender is covering/sitting on half the sidewall near the top, towards the back.

ESR does state you can contact them for fitment info...maybe give it a shot and see what they say.
Also the rear wheel looks like it's cambered a little, like it has a camber kit....trying to make the wheel tuck.

How do you know if tires are stretched? good question...for an ideal and safe fitment the rim width should be approx. 90% (+/- 5%) of the tire tread width.
Example: if you want to run a 9.5 inch (241mm) rim (the width), then the tire sizing would have a range of 245mm to 275mm tread width...the ideal fitment would be a 255mm or 265mm tire.
If someone is running a 10.5 inch (267mm) rim with a 235mm tire...without even doing the math you can see already the tire is stretched...simply the tire tread should never be narrower (smaller) than the rim width.