gsbill

I'm looking to get new 18 wheels for my gs430. like the oz racing, what offsets to get the best fill out of my wheel wells. Stock height, possibly soon will install l-tuned suspension. thanks, I know I can trust your advice.

MikeGS4PE

don't even think of running larger than stock wheels without lowering!!! It will look sick, literally!

Suspension before wheels!

SoCalSC4

That's a pretty vague question... what widths are offered in the OZs that you like? Acceptable offset may vary with the wheel widths you intend to run.

alexulan

do a search for offset.
I think it is 44.
But do get a 1" drop.

gsbill

Thanks for the replies! I like the oz volcano or the chrono evolution, they come in 8 and 9 in widths. I was thinking about maybe 8's all the way around or staggering 8 up front with 9 in the back. I have to have clients in my car and need to keep some of the smooth ride, or I would like to go with 19 or 20 inch rims.
How about the H&R springs as opposed to the l-tune?

MikeGS4PE

Try to go with at least 8.5" all around...Also, the L-tuned shocks/springs would give you a better ride in my opinion...you may want to consider the H&Rs with Bilstein shocks...I would NOT run stocks shocks with either set-up because they will wear out in less than 35,000 miles like in my case...so I replaced them with some coilovers I was running the Eibach/stock shock combo (still am until thursday) Hope this helps...Again, 8.5 at least in the front...if not all around...or 8.5/9.5 if you stagger (ideal).

SoCalSC4

Nominally, an 18x8.5 with a +37 is safe: here's a quick list of offset ranges you can use for the GS:

Front/Rear
18x8.0 +25 to +54
18x8.5 +31 to +48
18x9.0 +37 to +42


Rear only
18x9.0 +33 to +64
18x9.5 +39 to +58
18x10.0 +45 to +52
18x10.5 +51 to +53

The first ofset plus number will give you the same "frontspacing" between all the wheel widths- this puts the outer edge of the wheel fairly close to the fender.

The second number (higher) moves the wheel more inboard. This number is not linear (called backspacing) because you can move a narrow wheel further inboard than a wider wheel before it hits the suspension (based on offset number values). Higher offsets 'suck the wheels inboard' more.

The secret forula here at HRE is:
18/19/20x8.5 +37
18/19/20x9.0 +40
18/19/20x9.5 +38
18/19/20x10.0 +44

Are you taking notes? There will be a quiz later

LexusRules

gs4bill should talk to gs4will!!

hehehehe sorry i just HAD to say that

GS4Will

man..i was about to say the SAME thing....dude welcome to CL...and you are in cali too:eek:

may be i do have a long lost bro... :eek:

Lvangundy

Here's something I don't get..I think all custom rim installations are done wrong or something.

If you change the rim size to something bigger, and keep the tire diameter size the same (to keep the speedo calibrated) and only decrease the profile. WHY does the car raise itself? What makes the car higher?Keeping the tire size (diameter) is the key thing here, so there should be NO reason the car becomes raised after putting 18"s or 19"s or 20"s unless the rim becomes bigger than the original tire diameter.

Any explanations?

MikeGS4PE

Lvangundy - Here is a reason to ponder...A 45/55 series tire would be able to wrinkle a bit more than the common 30/35 series tire found on 19s or 20s...

SoCalSC4

Actually, any20" tire currently on the market will raise a Lexus car by almost 1" - this is due to it's increased diameter.

You can plus-size to 18" or 19" and maintain the correct rolling diameter- I think that the impression of being 'raised' is created by the bigger wheel diameter and wider wheel width. The stock wheels are so 'sucked in' on the car that the wheel gap is visually minimized, whereas most aftermarket wheels sit more flush with the fender, actually exaggerating the wheel well gap.

Some people think "I'll go 19s, then I won't need to lower the car." I think the opposite is true- if you go big, you better go lower!