Yet another G50 wheel/tire fitment question...

[Lifted79CJ7]

OK, I have used the search button, only to have 500,000 threads come up, none with the answer to my question.

I found a wheel/tire combo and want to know if these will rub on my 91 Q45:

Wheels: 18X7.5 with a 45 offsetTires: 225/40/18

I am riding on a stock suspension. I see recomendations of a 35 or 40 offset, but is 45 too much?

Thanks,Jack

[qship96]

First off...tires you are suggesting as way too short in diameter, and most likely will not meet minimum load requirement{95}

Then the problem becomes this...to get tires in optimal size {245/40/18 or 245/45/18}, the wheels you are interested in are too narrow for these tire sizes! Optimal wheel would be 8-8.5" wide

That leaves you looking for 18X8 or 8.5 with a 245/40{45}/18 tire with offset of 35-40

[Lifted79CJ7]

Yeah, I thought that tire size sounded a little small - the guy is verifying it for me. Basically, I found these wheels and tires (80-90% tread left, includes chrome lugs, and a spare fifth tire) for $625. He also has new center caps for them if you are wondering. My car's tires are flat spotted, and I hate my wheels, so I need to do something ASAP.

The guy says they were on his 2000 I30.

This just seems like a good deal to me, but I obviously don't want to get something that isn't going to work.

Thoughts?

(This is a pic of the actual tire and rim I am looking at)
Modified by Lifted79CJ7 at 3:22 PM 2/3/2008

[maxnix]

1.) My car's tires are flat spotted, and I hate my wheels, so I need to do something ASAP.

2.) This just seems like a good deal to me, but I obviously don't want to get something that isn't going to work.

1.) Then use your funds to procure the best tires you can for your presumabaly undamaged wheels.

2.) How so? The fake bolts, or even worse even if real, rivets should tell you the wheels are heavier than they should be, you don't know their strength, and the wheels are too narrow to mount the 245/45 or 255/40 tires that work best with 18" wheels of proper strength and weight.

[Haitian_King]

1.) Then use your funds to procure the best tires you can for your presumabaly undamaged wheels.

2.) How so? The fake bolts, or even worse even if real, rivets should tell you the wheels are heavier than they should be, you don't know their strength, and the wheels are too narrow to mount the 245/45 or 255/40 tires that work best with 18" wheels of proper strength and weight.

Wait. Fake rivets/real rivets are bad? Multi-piece wheels (2 or 3 piece) don't work? I never knew that. Good thing I read this. I was looking at some similar wheels yesterday.

Why are they so bad?

Pretty sure that BBS RS2's have rivets on them. And the BBS wheels is highly lauded in the automotive community, not to mention a lovely addition to an Infiniti, Lexus, or BMW.

See? Look---->
Modified by Haitian_King at 9:01 PM 2/3/2008

[mxr662]

I have 7.5" on the front and they are too narrow. Tire choice is much too limited. I was told by old timers on this thread to pick the correct tires then get the rims to match the tire size. This was after I bought my rims.

Andy

[Rex]

You can run a 245/45/18 on the 7.5 wide rim, but the +45 offset is too high. I'd also venture a guess that the 225/40 tires don't meet the load rating to carry something as heavy as the Q.

Will running under load rated tires cause your car to burst into flames? NoMight it cause a blow out at speed? Yes, it's possible.Is it something you're willing to risk? (your answer here)

There are lost of "affordable" options out there, you just need to identify what you want (size/performance-wise) and then start the search. I've found several good options over the years, and always offer to help people find wheels and tires to meet their budget and "wants".

[maxnix]

1.) Wait. Fake rivets/real rivets are bad?

2.) Multi-piece wheels (2 or 3 piece) don't work?

3.) Pretty sure that BBS RS2's have rivets on them.

1.) Sure. cosmetic only, so added weight for no gain in strength.

2.) Yes they do, but are usually heavier than cast or especially forged single piece wheels. Notice F1 soes not use 3 piece construction. Teh main advantage is wheels can be made up in the correct offset and wheel width, and if the owner bungs a rim, that piece may be all theat needs to be replaced. As to the RS II and others with SS rim portetors, they are strictly for the street.

3.) As far as I know, no reputable wheel manufacturer (BBS, Rays, OZ Racing, Fikse) uses mechanically inferior rivets. OZ uses titanium bolts.

[Haitian_King]

1.) Sure. cosmetic only, so added weight for no gain in strength.

2.) Yes they do, but are usually heavier than cast or especially forged single piece wheels. Notice F1 soes not use 3 piece construction. Teh main advantage is wheels can be made up in the correct offset and wheel width, and if the owner bungs a rim, that piece may be all theat needs to be replaced. As to the RS II and others with SS rim portetors, they are strictly for the street.

3.) As far as I know, no reputable wheel manufacturer (BBS, Rays, OZ Racing, Fikse) uses mechanically inferior rivets. OZ uses titanium bolts.

Are the cosmetic rivets heavy enough to seriously disrupt performance? At high speeds, a few extra ounces can spell disaster right?

Even though the RS2 BBS wheels have rivets, would they be a bad option for the G50? (Assuming that they are installed at the correct offset.)

I'm still not understanding.

[tkd_q45]

I believe the reference to fake bolts and weight is related to true 3 piece wheels possibly being lighter than 1 piece wheels. I think it has some thing to do with cast vs forged. I can tell you that 18" rims will be heavier than stock and will noticeably affect performance. From switching from 18" (2003 Q45 Rims) back to stock there was a noticeable gain in acceleration + 1.5 - 2.5 MPG gain. Also, 225/40/18 is too short a sidewall by nearly 1" - 235/45/18 will give you a true 26" DIA. Tires narrower than 235 often have less than a 95 load rating as well.

[Haitian_King]

I believe the reference to fake bolts and weight is related to true 3 piece wheels possibly being lighter than 1 piece wheels. I think it has some thing to do with cast vs forged. I can tell you that 18" rims will be heavier than stock and will noticeably affect performance. From switching from 18" (2003 Q45 Rims) back to stock there was a noticeable gain in acceleration + 1.5 - 2.5 MPG gain. Also, 225/40/18 is too short a sidewall by nearly 1" - 235/45/18 will give you a true 26" DIA. Tires narrower than 235 often have less than a 95 load rating as well.

What I'd like is a nice set of wheels, larger than 15". Minimal visible sidewall, so I may go with low profile tires. I'm willing to sacrifice the MPG and some performance for aesthetic purposes. I'm quite vain.