Settled on wheel/tire sizes; need your help with offsets.
11-25-06, 11:29 AM
#1
Racer
Thread Starter
Settled on wheel/tire sizes; need your help with offsets.
Hi gang. Settled on 19" wheels/tires, in the sizes in bold below; best compromise IMHO.
First, here are the numbers, so everybody else can see where I'm coming from:
RIM WIDTH..........TIRE SIZE..........T/W RATIO.....CIRCUMF.....% CHG.....SPEED
8.0" (stock)..........245/40/18.............1.201..........80.791.......0.000.....80.00
8.5" (front)........245/35/19...........1.135..........80.902.......0.137..... 80.11
10" (back).........285/30/19...........1.122..........80.841.......0.062..... 80.05
Stock tire is crammed in the wheel, and a 275 tire (like most use) is too small for a 10" wheel, plus smaller in diameter even in the right wheel.
As you can see, both the 245/35/19 and 285/30/19 are almost a perfect match for stock diameter, so that's the way to go for me. And a 285 tire fits a 10" wheel like a 245 does in an 8.5" wheel, so the setup is consistent.
Additional facts:
- I DON'T want any rubbing whatsoever.
- Will not lower the car initially, but when I do, it'll probably be just springs, so only a mild drop (whatever it is).
- Don't want to use any spacers, and won't install a BBK.
- Prefer deep lips, and not the 'step' kind.
Now my questions:
- What offset do you recommend, front and back?
- Is offset the same with lip wheels than non-lip wheels?
- What's the maximum lip I can get (front and back) with the recommended offsets and my specified width?
Won't bother you with wheel and tire choices, but you're welcome to comment, of course. My car is silver/ecru, by the way, with just Blitz exhaust and 35% tint. Hope everybody is enjoying their Thanksgiving holiday.
First, here are the numbers, so everybody else can see where I'm coming from:
RIM WIDTH..........TIRE SIZE..........T/W RATIO.....CIRCUMF.....% CHG.....SPEED
8.0" (stock)..........245/40/18.............1.201..........80.791.......0.000.....80.00
8.5" (front)........245/35/19...........1.135..........80.902.......0.137..... 80.11
10" (back).........285/30/19...........1.122..........80.841.......0.062..... 80.05
Stock tire is crammed in the wheel, and a 275 tire (like most use) is too small for a 10" wheel, plus smaller in diameter even in the right wheel.
As you can see, both the 245/35/19 and 285/30/19 are almost a perfect match for stock diameter, so that's the way to go for me. And a 285 tire fits a 10" wheel like a 245 does in an 8.5" wheel, so the setup is consistent.
Additional facts:
- I DON'T want any rubbing whatsoever.
- Will not lower the car initially, but when I do, it'll probably be just springs, so only a mild drop (whatever it is).
- Don't want to use any spacers, and won't install a BBK.
- Prefer deep lips, and not the 'step' kind.
Now my questions:
- What offset do you recommend, front and back?
- Is offset the same with lip wheels than non-lip wheels?
- What's the maximum lip I can get (front and back) with the recommended offsets and my specified width?
Won't bother you with wheel and tire choices, but you're welcome to comment, of course. My car is silver/ecru, by the way, with just Blitz exhaust and 35% tint. Hope everybody is enjoying their Thanksgiving holiday.
11-28-06, 03:30 PM
#2
Racer
Thread Starter
Nobody knows? Or just don't want to help? The answer is obvious
. Tough crowd
.
Mods, please delete. I'll look for answers on a friendlier site.
. Tough crowd.Mods, please delete. I'll look for answers on a friendlier site.
Last edited by JCtx; 11-28-06 at 04:13 PM.
11-28-06, 04:42 PM
#4
Besides, if your not going to lower your car and you aready picked your tire sizes, the wheels could stick outside of the car and you wouldn't rub...
11-29-06, 01:08 PM
#6
Not to be a jerk but I thought this is what the wheel fitment guide is for... Plus, you can always do a search to see what everyone else is running as your are going with a very common size for wheels.
Besides, if your not going to lower your car and you aready picked your tire sizes, the wheels could stick outside of the car and you wouldn't rub...
Besides, if your not going to lower your car and you aready picked your tire sizes, the wheels could stick outside of the car and you wouldn't rub...
11-30-06, 11:03 AM
#7
Racer
Thread Starter
Hipendicul, you called yourself a jerk not me (the '+1' guy really is), and I guess you haven't read the 'wheel fitment' guide, like I DID.
If you read it, it's for the GSs man, as many SC430 people have used +22/24 offsets without the tires sticking out, and the 'aggressive' offset listed on the guide says +42, which is NOT. Plus that guide lists +44 as conservative and +42 as aggressive: just 2mm from conservative to aggressive? Come on. That guide is wrong for the SC, and that was why I posted my message; don't trust it.
Hey Tallwang, your help is always appreciated, my friend. When I was discussing wheels with you, I hadn't made up my mind on sizes; now I have. Take care.
If you read it, it's for the GSs man, as many SC430 people have used +22/24 offsets without the tires sticking out, and the 'aggressive' offset listed on the guide says +42, which is NOT. Plus that guide lists +44 as conservative and +42 as aggressive: just 2mm from conservative to aggressive? Come on. That guide is wrong for the SC, and that was why I posted my message; don't trust it.
Hey Tallwang, your help is always appreciated, my friend. When I was discussing wheels with you, I hadn't made up my mind on sizes; now I have. Take care.
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11-30-06, 11:34 AM
#8
Hmm... it is there, man
Maybe you read it at the time it wasn't available yet or something.
Just a little C&P here.
SC430 Wheels Fitment
Since November of 2004, I have become a proud owner of the SC430. One of the biggest complaints from most SC430 owners is the stock wheel design. The design from 2002 to 2004 (so called pie-plates) was just not pleasing at all. With the 2005 wheel cover changed to 5 spoke style, it looks a lot better. And in 2006 they once again changed the design and now it's a full alloy 18" setup, no more wheel covers.
Regardless, the stock wheel setup on the SC430 is even more conservative than that you can find on the GS, especially the real wheel where it's sitting very inboard. Visually this is not appealing at all. For sure getting better looking wheels at the correct size and offset becomes a highly discussed topic.
For the record, the stock SC430 wheels they are 18x8 +45, and they are wrapped with 245/40/18 tires. Keep in mind that most SC430 come with run-flat tires and also the tire pressure sensors. Run-flat tires have super thick sidewall for the support, that's why they ride very harsh. A lot of members have complained about the ride of the SC430, saying that it's very stiff and not comfortable. Little do they know that it's all about the tires, by changing the tires to normal all-season or high performance tires, the ride will drastically improved. Moreover, because of the tire pressure sensors, when shopping for aftermarket wheels, you want to make sure you can retain the sensors still. Please check with your wheel suppliers for more information. If you decide to run aftermarket wheels without tire pressure sensors, the warning light will come up on the dash.
Of all the information I have gathered, I have read that 19x9.5 +45 fits on the SC430 no problem, front and back. Granted this setup is extremely conservative and it's far from being flush with the fenders in the back, it's a very good baseline for calculations.
Currently I am running 20x9 +30 with 255/35/20 and 20x10.5 +29 with 285/30/20 on my SC430 without any fender modifications. It's pretty much as aggressive as you can go without modifications, and the SC430 is actually not very friendly in this manner, since both the front and rear fender lining are "integrated" with the fender lip, you can't just shave the lip and call it a day without spending time with the lining as well. I would suggest against this.
And for wheel size, I will only talk about 19" and 20" setup. 18" is the same as stock and personally I think 19" is the minimum.
19" Difficulty
19x9.5 +45 19x9.5 +45 conservative
19x9 +24 19x10 +24 aggressive
19x9.5 +30 19x10.5 +30 aggressive
19x9 +30 19x11 +36 professional
20" Difficulty
20x8.5 +18 20x10 +24 aggressive
20x9 +24 20x10 +24 aggressive
20x9 +24 20x10.5 +30 aggressive
20x9.5 +30 20x10.5 +30 aggressive
20x9 +24 20x11 +36 professional
There are several things I want to point out. First of all, besides the "weak" setup I mentioned, all other setups I put down aggressive as the minimum difficulty. The reason is with those sizes, tire choice plays an important role. Getting the right brand and sizes of tires is the key for no rubbing. If you want any conservative setup, you can just get the aggressive setup and add 6 to 10mm of offset for more room.
For 20", you actually run into the "typical" problem of rubbing the top of the front wheel well lining, just like what you face when putting 20" on the GS. However, on the SC430 it's actually worse since the lining is even stiffer, has more "*****", and there are more places for rubbing. As long as your car is lower to around 2-finger gap, I can pretty much guarantee rubbing the top of the wheel well with 20" wheels. Mine does, but after a while the lining will be rubbed away, leaving a small hole there and everything will be back to normal.
In terms of tires, my suggestions would be as follows:
Wheel Size Tires Within Spec?
19x9 245/35/19 255/35/19 yes
19x9.5 255/35/19 yes
19x10 275/30/19 285/30/19 yes
19x10.5 285/30/19 yes
19x11 295/30/19 yes
19x11* 305/30/19 slightly over
19x9 245/40/19 255/40/19 no (fat setup)
19x9.5 255/40/19 no (fat setup)
19x10 275/35/19 285/35/19 no (fat setup)
19x10.5 285/35/19 no (fat setup)
20x9 245/35/20 255/30/20 no
20x9 245/30/20 255/30/30 yes
20x9.5 255/35/20 no
20x9.5 255/30/20 yes
20x10 275/30/20 285/30/20 no
20x10 275/25/20 285/25/20 yes
20x10.5 285/30/20 no
20x10.5 285/25/20 yes
20x11 295/25/20 yes
20x11* 305/25/20 slightly over
* Please keep in mind, if you want to run 11" wide rim in the back with 305 series tires, you want to add couple of mm to your wheel offset since the tires are wider. Otherwise you run into great risk of rubbing.
And again, different brand and model of tires have different shapes, curvatures, corners, thickness, etc… and all these contribute to how well the overall wheel package clears the fender. All setup here are aggressive, meaning that they are close to the fender walls. You definitely want to be careful and study enough to make sure you purchase the right combo.
Maybe you read it at the time it wasn't available yet or something.
Just a little C&P here.
SC430 Wheels Fitment
Since November of 2004, I have become a proud owner of the SC430. One of the biggest complaints from most SC430 owners is the stock wheel design. The design from 2002 to 2004 (so called pie-plates) was just not pleasing at all. With the 2005 wheel cover changed to 5 spoke style, it looks a lot better. And in 2006 they once again changed the design and now it's a full alloy 18" setup, no more wheel covers.
Regardless, the stock wheel setup on the SC430 is even more conservative than that you can find on the GS, especially the real wheel where it's sitting very inboard. Visually this is not appealing at all. For sure getting better looking wheels at the correct size and offset becomes a highly discussed topic.
For the record, the stock SC430 wheels they are 18x8 +45, and they are wrapped with 245/40/18 tires. Keep in mind that most SC430 come with run-flat tires and also the tire pressure sensors. Run-flat tires have super thick sidewall for the support, that's why they ride very harsh. A lot of members have complained about the ride of the SC430, saying that it's very stiff and not comfortable. Little do they know that it's all about the tires, by changing the tires to normal all-season or high performance tires, the ride will drastically improved. Moreover, because of the tire pressure sensors, when shopping for aftermarket wheels, you want to make sure you can retain the sensors still. Please check with your wheel suppliers for more information. If you decide to run aftermarket wheels without tire pressure sensors, the warning light will come up on the dash.
Of all the information I have gathered, I have read that 19x9.5 +45 fits on the SC430 no problem, front and back. Granted this setup is extremely conservative and it's far from being flush with the fenders in the back, it's a very good baseline for calculations.
Currently I am running 20x9 +30 with 255/35/20 and 20x10.5 +29 with 285/30/20 on my SC430 without any fender modifications. It's pretty much as aggressive as you can go without modifications, and the SC430 is actually not very friendly in this manner, since both the front and rear fender lining are "integrated" with the fender lip, you can't just shave the lip and call it a day without spending time with the lining as well. I would suggest against this.
And for wheel size, I will only talk about 19" and 20" setup. 18" is the same as stock and personally I think 19" is the minimum.
19" Difficulty
19x9.5 +45 19x9.5 +45 conservative
19x9 +24 19x10 +24 aggressive
19x9.5 +30 19x10.5 +30 aggressive
19x9 +30 19x11 +36 professional
20" Difficulty
20x8.5 +18 20x10 +24 aggressive
20x9 +24 20x10 +24 aggressive
20x9 +24 20x10.5 +30 aggressive
20x9.5 +30 20x10.5 +30 aggressive
20x9 +24 20x11 +36 professional
There are several things I want to point out. First of all, besides the "weak" setup I mentioned, all other setups I put down aggressive as the minimum difficulty. The reason is with those sizes, tire choice plays an important role. Getting the right brand and sizes of tires is the key for no rubbing. If you want any conservative setup, you can just get the aggressive setup and add 6 to 10mm of offset for more room.
For 20", you actually run into the "typical" problem of rubbing the top of the front wheel well lining, just like what you face when putting 20" on the GS. However, on the SC430 it's actually worse since the lining is even stiffer, has more "*****", and there are more places for rubbing. As long as your car is lower to around 2-finger gap, I can pretty much guarantee rubbing the top of the wheel well with 20" wheels. Mine does, but after a while the lining will be rubbed away, leaving a small hole there and everything will be back to normal.
In terms of tires, my suggestions would be as follows:
Wheel Size Tires Within Spec?
19x9 245/35/19 255/35/19 yes
19x9.5 255/35/19 yes
19x10 275/30/19 285/30/19 yes
19x10.5 285/30/19 yes
19x11 295/30/19 yes
19x11* 305/30/19 slightly over
19x9 245/40/19 255/40/19 no (fat setup)
19x9.5 255/40/19 no (fat setup)
19x10 275/35/19 285/35/19 no (fat setup)
19x10.5 285/35/19 no (fat setup)
20x9 245/35/20 255/30/20 no
20x9 245/30/20 255/30/30 yes
20x9.5 255/35/20 no
20x9.5 255/30/20 yes
20x10 275/30/20 285/30/20 no
20x10 275/25/20 285/25/20 yes
20x10.5 285/30/20 no
20x10.5 285/25/20 yes
20x11 295/25/20 yes
20x11* 305/25/20 slightly over
* Please keep in mind, if you want to run 11" wide rim in the back with 305 series tires, you want to add couple of mm to your wheel offset since the tires are wider. Otherwise you run into great risk of rubbing.
And again, different brand and model of tires have different shapes, curvatures, corners, thickness, etc… and all these contribute to how well the overall wheel package clears the fender. All setup here are aggressive, meaning that they are close to the fender walls. You definitely want to be careful and study enough to make sure you purchase the right combo.
11-30-06, 12:38 PM
#10
LOL, I wasn't insulting you with "personal attacks" & name calling so why do it to me? 
Like talwang said, the sc430 fitment is there. You get mad just b/c people don't respond to your thread? LOL, I think you should calm down. 
Like talwang said, the sc430 fitment is there. You get mad just b/c people don't respond to your thread? LOL, I think you should calm down.
Last edited by Yeah!; 11-30-06 at 12:44 PM.
11-30-06, 04:32 PM
#11
Hipendicul, you called yourself a jerk not me (the '+1' guy really is), and I guess you haven't read the 'wheel fitment' guide, like I DID.
If you read it, it's for the GSs man, as many SC430 people have used +22/24 offsets without the tires sticking out, and the 'aggressive' offset listed on the guide says +42, which is NOT. Plus that guide lists +44 as conservative and +42 as aggressive: just 2mm from conservative to aggressive? Come on. That guide is wrong for the SC, and that was why I posted my message; don't trust it.
Hey Tallwang, your help is always appreciated, my friend. When I was discussing wheels with you, I hadn't made up my mind on sizes; now I have. Take care.
If you read it, it's for the GSs man, as many SC430 people have used +22/24 offsets without the tires sticking out, and the 'aggressive' offset listed on the guide says +42, which is NOT. Plus that guide lists +44 as conservative and +42 as aggressive: just 2mm from conservative to aggressive? Come on. That guide is wrong for the SC, and that was why I posted my message; don't trust it.
Hey Tallwang, your help is always appreciated, my friend. When I was discussing wheels with you, I hadn't made up my mind on sizes; now I have. Take care.
Huh? Am I missing something. The wheel fitment guide isn't perfect but I don't remeber it saying anything about +40 offsets being aggressive. I used the guide to get me in the ball park for my wheels. Maybe I read the wrong one that got me the correct information? (oh I'm being sarcastic..)
11-30-06, 11:41 PM
#12
see, that's one of the reasons why i didn't regret much when i first pulled the guide.... in general it creates more trouble than really helping someone....
JC, i don't know what's wrong on your side, but obviously the sc430 fitment is IN THE GUIDE
http://www.lgwnorcal.com/articles/wheelfitment.html
if you can't se ethe big sc430 at the top, or can't find sc430 fitment when you scroll down, then sorry can't really help you.....
1) offset has nothing to do with lip size, or lip/no lip at all. it only has to do with width. so lip or not, offset and width the sames, then the wheels fit the same
2) there is no "maximum lip for an offset". it has to do with spoke design. every company is different
and JC, let's consider this a warning to you on your posts against Hipendicul and Yeah!. we don't allow personal attacks here. saying someone is a jerk publicly here on clublexus is not going to bring you anywhere.
JC, i don't know what's wrong on your side, but obviously the sc430 fitment is IN THE GUIDE
http://www.lgwnorcal.com/articles/wheelfitment.html
if you can't se ethe big sc430 at the top, or can't find sc430 fitment when you scroll down, then sorry can't really help you.....
1) offset has nothing to do with lip size, or lip/no lip at all. it only has to do with width. so lip or not, offset and width the sames, then the wheels fit the same
2) there is no "maximum lip for an offset". it has to do with spoke design. every company is different
and JC, let's consider this a warning to you on your posts against Hipendicul and Yeah!. we don't allow personal attacks here. saying someone is a jerk publicly here on clublexus is not going to bring you anywhere.
12-01-06, 08:59 PM
#13
Racer
Thread Starter
I have nothing against 'Hipendicul', for the record, and didn't 'personally attacked' him, so chill out Rominl.
Sorry for my reply Hipendicul, but your comment rubbed me the wrong way man. If you don't have something positive to say, why not just move on??? That simple philosophy would avoid 99% of the conflicts.
As for the 'other guy', never liked his attitude, but already solved that problem a few days ago by putting him on my 'ignore list' (first time ever I have to use that feature), so problem solved.
Back to the subject. I read the 'sticky' guide posted on top of this forum. What you guys posted is totally different indeed, but still no info on 8.5/19s. I apologize for the confusion. Have a nice weekend gang.
Sorry for my reply Hipendicul, but your comment rubbed me the wrong way man. If you don't have something positive to say, why not just move on??? That simple philosophy would avoid 99% of the conflicts.
As for the 'other guy', never liked his attitude, but already solved that problem a few days ago by putting him on my 'ignore list' (first time ever I have to use that feature), so problem solved.
Back to the subject. I read the 'sticky' guide posted on top of this forum. What you guys posted is totally different indeed, but still no info on 8.5/19s. I apologize for the confusion. Have a nice weekend gang.
Last edited by JCtx; 12-01-06 at 09:16 PM.
12-01-06, 11:27 PM
#14
Can't we all get along?...How about a group hug mang? 
12-02-06, 02:08 AM
#15
I have nothing against 'Hipendicul', for the record, and didn't 'personally attacked' him, so chill out Rominl.
Sorry for my reply Hipendicul, but your comment rubbed me the wrong way man. If you don't have something positive to say, why not just move on??? That simple philosophy would avoid 99% of the conflicts.
As for the 'other guy', never liked his attitude, but already solved that problem a few days ago by putting him on my 'ignore list' (first time ever I have to use that feature), so problem solved.
Back to the subject. I read the 'sticky' guide posted on top of this forum. What you guys posted is totally different indeed, but still no info on 8.5/19s. I apologize for the confusion. Have a nice weekend gang.
Sorry for my reply Hipendicul, but your comment rubbed me the wrong way man. If you don't have something positive to say, why not just move on??? That simple philosophy would avoid 99% of the conflicts.
As for the 'other guy', never liked his attitude, but already solved that problem a few days ago by putting him on my 'ignore list' (first time ever I have to use that feature), so problem solved.
Back to the subject. I read the 'sticky' guide posted on top of this forum. What you guys posted is totally different indeed, but still no info on 8.5/19s. I apologize for the confusion. Have a nice weekend gang.
if you have any issues, pm me or other moderators. do not challenge moderator decisions, read the forum rules
as for everyone else, please get back on topic please.
thanks