Another Thread Concerning M35 / M45 Wheels on the G50

[lino]

I've been asking many questions regarding putting M35/M45 wheels on my 1991 Q45A and the only issue that I've been told that could be a potential problem is the offset. The wheels specs for my car and the M35 / M45 are identical except for the offset.



Here is a picture on the inside of a M35 wheel:



You can see the offset 47 and the 18 x 8 stampings.

Here is the front:





Today I was at a wheel shop and they recommended putting 3mm spacers and everything should fit ok.

What do you guys think? Has anyone tried to put these wheels on and had a fitment problem?

[elwesso]

AS we pointed out in the other thread, offset is NOT CONSTANT! IT DEPENDS ON WIDTH...

For instance, a 8in wide wheel with 30mm offset will be close to a 37mm offset wheel with 8.5in width...

Remember offset is the distance the hub is from the centerline of the wheel...

3mm spacers are not going to make any difference.. These wheels wont work without at least 15mm spacers, which I personally dont recommend spacers, but im not going to go in why because I dont want to get into that debate again

[lino]

AS we pointed out in the other thread, offset is NOT CONSTANT! IT DEPENDS ON WIDTH...

For instance, a 8in wide wheel with 30mm offset will be close to a 37mm offset wheel with 8.5in width...

Remember offset is the distance the hub is from the centerline of the wheel...

3mm spacers are not going to make any difference.. These wheels wont work without at least 15mm spacers, which I personally dont recommend spacers, but im not going to go in why because I dont want to get into that debate again

Okay. So what is the best offset ( or offset range) for an 18 x 8 inch wheel for my 1991 q45a?

Thank you

[elwesso]

Anything in the 30-35 range is about right... You could use a higher 30s but you probably wouldnt be able to run an ideal tire size in an 18... LIke 245-45 or 255-40.....

18x8 35mm offset is common and you cant go wrong.

[lino]

Thanks once again .

Man I really like those M35 wheels

[elwesso]

Im going to have a set of M45 wheels for sale soon, that are 18x7.5 40mm offset and should fit a stock Q nicely. Im not suing them because I cant fit them on my brakes.

[lino]

If I upgrade to the 300zxtt brake setup that you suggested or if I choose the 350z Brembo setup: 4-piston caliper with 12.8" x 1.18" vented front discs and 2-piston caliper with 12.7" x0.87" vented rear discs, will I have a problem with the 18" wheels and clearance?

BTW what wheels are you getting next after you get rid of your track wheels huh huh.... I'm dying to know.

[elwesso]

If I upgrade to the 300zxtt brake setup that you suggested or if I choose the 350z Brembo setup: 4-piston caliper with 12.8" x 1.18" vented front discs and 2-piston caliper with 12.7" x0.87" vented rear discs, will I have a problem with the 18" wheels and clearance?

BTW what wheels are you getting next after you get rid of your track wheels huh huh.... I'm dying to know.

With the G35/350Z wheels you wont have a problem, but ANY Q45/M45 wheel likely wont clear Z32s... i know Y34 M45 wheels wont!

Dont waste money on the 350Z brembo! Notice that on the 350Z/G35 setup they dont produce much less stopping distance... just resist fade better, and the 350Z brakes (stock sliding calipers) are hard to fade.. With that in mind Z32s are gonna be as good as you want! You dont need to go beyond that, trust me! its stupid to have huge brake upgrades when all you do is lock the tires up... When my tires are warmed up the Z32s dont lock up until lower speeds, but with the hawk pads installed, well, we'll see.

Im not getting rid of my 350Z track wheels... I couldnt sell them, they look so good, and they are so lightweight, itd be stupid to get rid of them. maybe when the 18/19 combo RAYS from the 06 350Z track ill look at those, in a year or so...

[Jeff Williams]

Tire Rack says a 9" wheel with a 45 MM offset works on the rear of the G50. That is what I bought, so they beter work, when I get them mounted!



AND the M45 wheels will work, if you shave of a few MM of the calipers, where NISSAN is embossed.

I ordered 2 MM spacers, anyway.

[elwesso]

1in= 25.4mm... 9in with 45 should be fine in the rear.. The front is where the problem is at with that goofy 3rd link.. The rear you have all the clearance you could ever want pretty much until you hit the strut...

[lino]

Tire Rack says a 9" wheel with a 45 MM offset works on the rear of the G50. That is what I bought, so they beter work, when I get them mounted!

I can't wait to see some pics! Are you going to go with 275 35 18s for the rear?

AND the M45 wheels will work, if you shave of a few MM of the calipers, where NISSAN is embossed.

Do you think it's better to shave a few mm or go with the spacers?

I ordered 2 MM spacers, anyway.

Why did you buy the spacers? Shouldn't the wheels you ordered work without them?

[elwesso]

definitely shave first.....

BTW the M45 wheels werent even CLOSE to clearing... Theyd probably need my 15mm spacer to clear.

[lino]

With the G35/350Z wheels you wont have a problem, but ANY Q45/M45 wheel likely wont clear Z32s... i know Y34 M45 wheels wont!

Thanks for the tip!

Dont waste money on the 350Z brembo! Notice that on the 350Z/G35 setup they dont produce much less stopping distance... just resist fade better, and the 350Z brakes (stock sliding calipers) are hard to fade.. With that in mind Z32s are gonna be as good as you want! You dont need to go beyond that, trust me! its stupid to have huge brake upgrades when all you do is lock the tires up... When my tires are warmed up the Z32s dont lock up until lower speeds, but with the hawk pads installed, well, we'll see.

If I do get the 350z brakes, they'll cost me much than the 300zxtt setup. That's the only reason why I've been considering them. If I don't have that option, I trust you 100% and will go on your word and setup choice

Im not getting rid of my 350Z track wheels... I couldnt sell them, they look so good, and they are so lightweight, itd be stupid to get rid of them. maybe when the 18/19 combo RAYS from the 06 350Z track ill look at those, in a year or so...

I love the way the wheels on your car look anyway. I always did.Do you think that the 18/19 combo RAYS from the 06 350Z track will fit on our cars? Maybe the fronts wheels will fit on the rear of our cars.

Here is a reminder of the specs and some pics:

2006 350Z Wheels and Tires 18" x 9.0" (front) RAYS® super-lightweight 5-spoke forged-alloy wheels. 19" x 10.0" (rear) RAYS® super-lightweight 5-spoke forged-alloy wheels. P245/40WR18 (front) and P265/35WR19 (rear) high-performance tires.

[elwesso]

Dang those wheels are hot!!!!!!! I want them on my Q..

If you cna get the G35 brakes for 300ZX brake prices (say $300 for all 4 calipers and $250 for all 4 rotors) sign me up for about 3 so i can sell them on ebay.....

[lino]

Dang those wheels are hot!!!!!!! I want them on my Q..

If you cna get the G35 brakes for 300ZX brake prices (say $300 for all 4 calipers and $250 for all 4 rotors) sign me up for about 3 so i can sell them on ebay.....

The G35 brakes (12.6" front discs and 12.1" rear discs) are smaller than the 350z brakes that are on the Brembo setup (12.8" front discs and 12.7" rear discs). I haven't seen the Brembos on a G35 yet. I only see them on the 350z.

Let me get one set of brakes first and pay for them and I'll be sure to let you know if there really is a deal to be had

BTW Your wheels were available on what year cars?
Modified by lino at 11:49 PM 4/11/2006

[Jeff Williams]

I shaved about 4 MM off of the calipers. I have a 1 MM clearance, now. I am adding the spacers, just to get a little more clearance.

I already have the 275/35/18 tires sitting in the garage, waiting on the wheels. They should fill the fenders nicely.

I will post some "good" pics, once the wheels get in.

The next install, will be the Cali Custom springs and adjustable upper links.

Then off to work on my custom SS mesh grille insert. I have a spare grille, that I will be using for a test mule.

[maxnix]

Anything in the 30-35 range is about right... You could use a higher 30s but you probably wouldnt be able to run an ideal tire size in an 18... LIke 245-45 or 255-40.....

18x8 35mm offset is common and you cant go wrong.

I'll disagree.

On the test fitting (no running) of my wife's 18x9 +35mm OZ wheel with 255/40-18 PS2 on the front of my G50, it was close to the fender lip in front, so I wouldn't go beyond +33mm offset. Even +34 maight have been too close for that combination. All stock springs, of course.

However, there was an easy half inch on the insde between the rim and the shock, so I would say for that combination of wheel & tire, optimal offset would be +38mm - +42mm, but you could probably run +45mm like stock.

As to the other question on the 18x8 OEM Y50 wheels, I would run a 6mm spacer for security, but you may be able to run 10mm for looks.

Don't for get the longer lugs required.

[maxnix]

Tire Rack says a 9" wheel with a 45 MM offset works on the rear of the G50. That is what I bought, so they beter work, when I get them mounted!

It will. You can actually go up to 10 or 10.5.

Did you go through the NICO TR guy Blake Bauer? He is sharp and researched CAD drawings for me to confirm my fit of the non-recommended tire wheel combination.

[lino]

....so I would say for that combination of wheel & tire, optimal offset would be +38mm - +42mm, but you could probably run +45mm like stock.

And so do you think I'd be pushing it with the +47mm offset of the M35 wheel?

As to the other question on the 18x8 OEM Y50 wheels, I would run a 6mm spacer for security, but you may be able to run 10mm for looks.

Don't for get the longer lugs required.

Thanks for the reminder. Definitely very important .

[maxnix]

And so do you think I'd be pushing it with the +47mm offset of the M35 wheel?

Well, it may be too far in towards the shock tower. Try a dry fit with the tire of choice and see.

I think a 6mm plate (precisely parallel, and check your lateral hub runout after they are cleaned with a wire brush) and the correct hardware would work for sure.

Be patient, go slow, check and measure everything twice.

[elwesso]

I'll disagree.

On the test fitting (no running) of my wife's 18x9 +35mm OZ wheel with 255/40-18 PS2 on the front of my G50, it was close to the fender lip in front, so I wouldn't go beyond +33mm offset. Even +34 maight have been too close for that combination. All stock springs, of course.

However, there was an easy half inch on the insde between the rim and the shock, so I would say for that combination of wheel & tire, optimal offset would be +38mm - +42mm, but you could probably run +45mm like stock.

As to the other question on the 18x8 OEM Y50 wheels, I would run a 6mm spacer for security, but you may be able to run 10mm for looks.

Don't for get the longer lugs required.

Interesting, except I was comparing a 8in wheel and your comparing a 9in wheel... OF COURSE you wont be able to run 35mm offset in a 9in wheel.. Its gonna have to be closer to 40..

Just so you know, you cannot run much bigger than 5mm spacer using stock studs... Im surprised your soliciting the use of spacers

18x8 ET47 simply WILL NOT work on a G50 sans spacers and I would recommend against it..

REMEMBER That just because if fits fine as the car is sitting still does not mean it will fit under turning.. remember the hub turns relative to the 3rd link, so if your close, your gonna rub under more turning on the 3rd link!

[maxnix]

1.) Interesting, except I was comparing a 8in wheel and your comparing a 9in wheel... OF COURSE you wont be able to run 35mm offset in a 9in wheel.. Its gonna have to be closer to 40..

2.) Im surprised your soliciting the use of spacers

3.) 18x8 ET47 simply WILL NOT work on a G50 sans spacers and I would recommend against it..

REMEMBER That just because if fits fine as the car is sitting still does not mean it will fit under turning.. remember the hub turns relative to the 3rd link, so if your close, your gonna rub under more turning on the 3rd link!

1.) I am pretty sure the 18x9 +35 would hav worked with stock springs, but I did not roll with them. It was only a static fit.

2.) Only within the context of fitting his chosen wheels. The best solution is to have a wheel with the correct offset, weight and strength with the best tire in the correct size one can afford.

3.) Probably correct. Why one must check fit very carefully.

[Falkdesigns]

There is absolutely NOTHING wrong with using smaller than 1/4" slip on or larger than 7/8" BOLT ON spacers -(the SAFER choice). But you are welcome to take opinions over facts if you prefer.

[Rex]

Correct, (quality) spacers are not the anti-christ, but cheap spacers would be a bad thing.

There are plenty of afffordable quality wheel options that bad fitment doesn't have to be "fixed".

Of course fitment is whole nother can of worms.

[elwesso]

There are plenty of afffordable quality wheel options that bad fitment doesn't have to be "fixed".

I agree.. I have never really said that spacers are a terrible idea, but they are not the best idea... For me, especially this summer, im going tobe racing my Q45 and spacers dont sound like a great idea......

[Rex]

I agree.. I have never really said that spacers are a terrible idea, but they are not the best idea... For me, especially this summer, im going tobe racing my Q45 and spacers dont sound like a great idea......

And the debate continues ...

There are racing series that see speeds your (or my) car will never reach, that use spacers .

Here's an example of some quality parts from Ronal.

[Falkdesigns]

There are racing series that see speeds your (or my) car will never reach, that use spacers .

EXACTLY.

[lino]

There is absolutely NOTHING wrong with using smaller than 1/4" slip on or larger than 7/8" BOLT ON spacers -(the SAFER choice). But you are welcome to take opinions over facts if you prefer.

Can you tell me for example which one of these you might suggest:

http://www.livermoreperformanc...ml#hr

and also would these be considered "good quality" :

http://www.rogueengineering.co...de=WH

[elwesso]

H/R spacers are generally regarded as the best quality... Thats what I have on my car for winter use.

[lino]

H/R spacers are generally regarded as the best quality... Thats what I have on my car for winter use.

What size spacers do you have? What size winter wheels and tires are you running?