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IS-F Wheel best fittment???

80K views 80 replies 20 participants last post by  Gymkata 
#1 ·
I'm looking into changing the rims for my F... just wondering whats the best fittment for it? front and rear??
 
#51 ·
Work Varianza T1S - Spec question

Hi,

I need to spec out sizes for some Work Varianza T1S wheels.

I would like to run 19" with a 245/35/19 and 275/30/19 set up.

Which rim sizes and offset would be recommended on a stock suspension set up?



Sorry, I tried to post a Work Wheels spec sheet, but too new to post URLs. Thanks in advance.
 
#52 · (Edited)
Hi,

I need to spec out sizes for some Work Varianza T1S wheels.

I would like to run 19" with a 245/35/19 and 275/30/19 set up.

Which rim sizes and offset would be recommended on a stock suspension set up?



Sorry, I tried to post a Work Wheels spec sheet, but too new to post URLs. Thanks in advance.
Below is the recommended wheel/tire fitment guide from discount tire direct that has been posted in many different threads. As far as I know, every combination here works on the ISF without rubbing of any kind. According to below, in order to run a 245/35R19 front, you could use an 8 inch rim (+29to+59 offset), 8.5 inch rim (+35to+52 offset), or a 9 inch rim (+41to+46 offset). In order to run a 275/30R19 rear, you could use a 9 inch rim (+39to+65 offset), 9.5 inch rim (+45to+65 offset), 10 inch rim (+52to+65 offset), or a 10.5 inch rim (+58to+60). I listed 275 as fitting on a 9 inch rim, because I am running 275/30R19s on the stock rear 9 inch rims right now without problems. With all of these wheel widths, the narrower the wheel the greater number of offset options. Also, though it might fit, I would not recommend putting a 275 on a 10.5 rim. Of course I have my bias as I hate the stretch look. I like fitting the widest tire possible on a rim, not the the reverse.

FRONT
WHEEL WIDTH OFFSETS WIDTH OF TIRE
7.0 +16/+65 225
7.5 +22/+65 225/235
8.0 +29/+59 225/235/245
8.5 +35/+52 235/245/255
9.0 +41/+46 245/255/265

REAR
WHEEL WIDTH OFFSETS WIDTH OF TIRE
8.0 +26/+65 225/235/245
8.5 +33/+65 235/245/255
9.0 +39/+65 245/255/265
9.5 +45/+65 255/265/275
10.0 +52/+65 265/275/285
10.5 +58/+60 275/285/295
 
#53 · (Edited)
#55 · (Edited)
If you were to go with a 20 inch wheel, the offsets would be the same for each width. Most of the tire widths would still be applicable, but you would need to check with an expert first. I assume the less the sidewall, the less room you have to vary tire widths and still seat the tire properly.

As far as tire sizes, 245/30R20s are about 25.8 inches tall. For the rear, 275/30R20s are about 26.5 inches tall, while 275/25R20s are about 25.4 inches. I would opt for the latter personally, as I would prefer a slightly shorter rolling radius vs a slightly longer rolling radius. The stock tires are right around 26 inches tall.

Realize if you go with a 20 inch wheel, you will be increasing unsprung weight/lowering performance...at the expense of a little bling bling. Many prefer this as it does look nice, but personally, I am considering going with an aftermarket set of 18s for weight saving purposes.
 
#57 ·
Okay so deciding to seriously consider 19x8.5 & 19x9.5 with 245/35/19 and 275/30/19.

Or 19X9 & 19X10 with the same tire sizes

From Work Wheels link above (still can't post URLs):


Would:
19X8.5 +43
19X9.5 +55 be the best set up for option 1?


19X9 +41
19X10 +54 be the best set up for option 2?

Thanks in advance.
 
#58 ·
As long as you are only planning on running 245 & 275, and not wider, I would recommend the 8.5 and 9.5 inch wheels. They will be a little bit lighter, and I see no reason for the extra rim width running those tire widths. Both sets of wheel offsets you listed will work according to Discount Tire Direct's list of ranges. Just make sure you get wheels with a 5X114.3 lug pattern, not something else by mistake.
 
#59 · (Edited)
You know, if you got the 19x9 front and 19x10 rear wheels, you could run Continental ExtemeContact DW tires in 255/35R19 fronts and 285/30R19 rears. These sizes would be very close to stock, and would give 30mm wider rubber front and rear over stock. The Continental DW's are a great Max Performance summer tire, that have done well in comparisons to the Pilot Sport PS2s, but have a lot longer tire life, and are much less expensive. Having a 255 up front should help kill understeer as well.

So I guess that is my recommendation: 245/275 with 8.5/9.5 or 255/285 with 9.0/10.0

You should be able to fit a 295/30R19 on a 10 inch rim as well. I don't know if it would rub or not though. If it did, it would be minor, and rolled fenders should easily solve it.
 
#61 ·
Discount Tire Direct uses a machine to calculate exactly what will fit with each wheel width & offset and tire width. According to their chart, yes, your combination will work.
 
#63 ·
What is the most flush and concave offset for:

19 x 8.5 F
19 x 10 R

provided that I'm running the stock suspension? Would 19 x 9 F be better?
What tire size should I go with?

Thanks in advance!
 
#64 · (Edited)
Hint: To everybody who has wheel/tire fitment questions - The below chart created by Discount Tire Direct is easy to understand...

X20A, according the the chart, you can go up to a 265 width in front (I don't know anybody running this on the street though). You can go up to 295 in the rear (There is at least on guy running 305s with stock fenders).

Probably the most recommended max width wheel/tire combo would be 255/35R19s on 19x9 +41 to +46 offset and 295/30R19s on 19x10.5 + 58 to +60 offset. I'm sure you could also fit the 295 tire on a 10 inch wheel.

See post #59 from this thread, it also has a few wheel/tire recommendations.


FRONT
WHEEL WIDTH OFFSETS WIDTH OF TIRE
7.0 +16/+65 225
7.5 +22/+65 225/235
8.0 +29/+59 225/235/245
8.5 +35/+52 235/245/255
9.0 +41/+46 245/255/265

REAR
WHEEL WIDTH OFFSETS WIDTH OF TIRE
8.0 +26/+65 225/235/245
8.5 +33/+65 235/245/255
9.0 +39/+65 245/255/265
9.5 +45/+65 255/265/275
10.0 +52/+65 265/275/285
10.5 +58/+60 275/285/295
 
#65 · (Edited)
When I finally decide to get aftermarket wheels, I may get 18s for weight savings purposes. I would get 18x9 fronts and 18x10 rears, and run Continental ExtremeContact DW tires, 265/40R18 (26.3"tall) front and 295/35R18 (26.1" tall) rear. Of course I will have to make sure that the wheels are designed to clear the brakes. Using an ultra lightweight monoblock forged wheel, this combination would save over 30 lb overall from the stock wheels and Bridgestone tires, and have 40mm (!!!!) more width all around...talk about helping to kill understeer.

If anybody wanted to MAX out width, you could go with 19x9 front with 265/35R19s (26.3" tall) and 19x10.5 rear with 305/30R19s (26.2" tall). Rolling the rear fenders might be necessary, but DAMN, 305s would be great in the rear.
 
#66 ·
305/30 has been done by FIGS. I'm running 285/30 on the rears with my stockers. The first two picts are FIGS, the last two are mine.

Lou
 

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#67 ·
How do you feel about the dry grip of the Continental DWs? I'm pretty sure they are going to be the tire I use when I get aftermarket rims (who knows when). From what I can tell, and from my experience with the DWSs, the DWs are the best overall Max Performance Summer tire if you factor in performance, tire life, and cost.
 
#68 ·
Hi,
Changing to the wider tires, will it give more grip in the turns? since the side walls may not be aligned properly to the rims? Will it make the car more slushy? I am sure the straight line drag will improve since we will get more traction.
What is the experience of people who have gone wider on stock wheels.
Also it would be nice to have the posts with pictures and experiences moved to the top of the post, put in a separate thread.
Thanks,
Ash

Anyone in the Bay Area with those changes, I would like to see in person!
 
#69 ·
^^^^I did start a thread when I put on my 245/285 Continental combo:

http://www.lexusfforum.com/forums/showthread.php?t=3159

I'm still very happy with my choice, over 1K miles on 'em now. The ride is a little better. The car corners better, and of course straight line traction is improved. I'm not sure what you mean by slushy, but if it's bad, I don't have it. There is a freeway exit near my home, that I can now take about 5MPH faster than I could on my old stock Michelins.

Lou
 
#70 ·
Hi Lou,
I was just wondering. I was not stating a fact. I wanted your opinion only. I guess in our threads, the detail gets lost. Your opinions and experiences should be just moved to the top, or as a matter of fact the opinions of people who have changed to wider tires and are seeing better handling should write up and put more pictures. I am almost due for new tires and am pushing the car to its limits on the stock wheels and tires in the mountains so improved handling would make the ride more enjoying.
Thanks
Ash
 
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