I wanna buy some wheels...

[szh]

[quote=" Gadgeteer What was the offset of the original J30 rims? [/quote]

I think it was 40mm, but I am not sure of this ...

Z

[szh]

Would those fit a '93 J30? Would the overall diameter be the same or would it throw my speedo off?

I do not know if it would fit on a J or not. But with regard to the other question, it is generally possible to find a tire size that will bring the speedo to a close enough value.

For example, on my 1995 Q, the stock 15 rims take 215/65-15 tires for an approx diameter of 26". With 17" rims, I can get about the same diameter with 245/45-17 tires, depending on the make/brand of tire. So the speedo error is essentially imperceptible.

http://www.tirerack.com has a discussion on "plus sizes" as they are called, to show how to compensate for changes in wheel size by selecting the right tire size.

Z

[maxnix]

How about a set of four fronts???

How about a set of four rears? I think in that width, 35mm is the desired offset.

Are they forged? How much do they weigh?

[Gadgeteer]

If the stock offset was 40mm for the J and I put 4 of the fronts on at 33mm offset, would that put the tires farther in or farther out?

I am ready to order these if they will work. I almost bought new tires and rims at Les Schwab on Fri after work, but held off till we could see if these would fit. I think they would look sharp and are a much better deal...

Thanks for the help,Gadget

[szh]

Hi, Gadget.

While looking at the wheel edge on, the offset is measured from a flat plane at the "center" of the wheel to the flat plane where the wheel meets the hub.

So, for a specific width and specific positive offset, a larger positive offset causes the wheel to be farther "in" (potential for tire rubbing on the suspension components) and a smaller positive offset is farther "out" (potential for tire not fitting inside the fender). Note the use of the word "positive" in this paragraph - it is important!

This is somewhat counter-intuitive, but you have to remember that the hub plane in context to the car is fixed, and the wheel must rest on that, so larger offsets causes the center plane of the wheel to move farther "in". And vice-versa.

Another way to look at it: a zero offset means that the wheel is centered exactly at the hub. Any positive offset and the center plane of the wheel moves "in" to the car (larger offsets move farther in); any negative offset and the center plane moves "out" towards the fender.

Depending on the actual wheel width used, the correct offset will depend on a lot of factors (where the suspension is, where the fender is, etc.) Some cars are particularly sensitive to tire and wheel width! For example, on my wife's Acura 2.2CL, using wider (or taller) than stock tires on the stock wheels is not recommended - there is only about 0.5" to 0.7" of clearance from the stock tire to the suspension components. I would need to buy lower offset wheels for wider than stock tires!

Personally, for a Q, I would not consider getting wheels any wider than 8" (or wider than 8.5" for rear) or an offset much less than 40mm, to avoid tire/fender mishaps. The 33m wheels mentioned here may work but the number is on the low side, IMHO! (I know, I know ... it is silly to measure width in inches and offset in mm, but that is the way it is done!) I know people have done so, but they also need to use stiffer shocks, or widen fenders, etc.

By the way, if you get Eibach lowering springs, then the wheel size and offset gets even more critical - particularly for the front wheels.

If you want to see some diagrams of the above, visit http://www.tirerack.com - they have lots of tech tire and wheel papers there. Here is the link to the offset info: http://www.tirerack.com/wheels/tech/offset.htm

Hope this helps!

Z

[szh]

I just got off the phone with my tire & wheel guy (otherwise known as Cade). He informed my that the front is 17" X 7.5" w/ 33 mm offset while the rear is a 17" X 8.5" w/ 30 mm offset. So it would look a little weird.

Joe, some question (not corrections) since the above numbers look a little odd to me. Can you and Cade check the actual wheels and elaborate or correct my mis-impressions?

1. I was under the impression that , when staggered for a particular car, the G35 wheels were staggered only 0.5". I.e. the combinations were 7 front and 7.5 rear OR 7.5 front and 8 inches rear. Are the above from different sets of cars then?

2. I also thought that the offsets were 30mm for the front and 33mm for the rear to make the plane of the outside of the tire/wheel sit the same relative to the fender. The above seems to be backwards. Can you check and correct me if I am wrong?

The wheels ought to have the size and offset "raised" into the metal on the inside!

Z

[Metroyed]

after all of this talk my head is starting to spin. I drive a 94 J30, and i desperately want those G35 17's(i dream about them, it's sad i know, but i have no life). Anyhoo, after reading this post im getting concerned, how much of a hassle am i really looking at to make them fit? Could i just pay someone to do it? Or would it be way too expensive?

[Jeff Williams]

This is what you need!

http://cgi.ebay.com/ebaymotors...43960

[szh]

This is what you need!

http://cgi.ebay.com/ebaymotors...43960

20" Wheels?!?

Good Grief, Charlie Brown. Way overkill for a J or Q.

Z

[Gadgeteer]

I actually thought about those, 20's would be tight! But would be sacrificing all comfort and ability to soak up the bumps...

18's are my sweetspot at this point I think... I am thinking these (kind of a Benz look to them) for my J: http://www.arceowheels.com/03a....html

I can get them for about $250/wheel installed (not including tires)

The stock wheels weigh about 19lbs each, these are about 26lbs each so I will need to change the brakes over to a larger diameter rotor and bigger calipers...

[j30t]

check out this thread regarding fitment of the g35 17" on the J. http://www.nissaninfiniticlub....heels By the way Joe...do you any of these wheels/tires left?

[maxnix]

18's are my sweetspot at this point I think... I am thinking these (kind of a Benz look to them) for my J: http://www.arceowheels.com/03a....html

I can get them for about $250/wheel installed (not including tires)

The stock wheels weigh about 19lbs each, these are about 26lbs each so I will need to change the brakes over to a larger diameter rotor and bigger calipers...

Kind of Gothic in contrast to the clean modern styling of the J. Are those 2 or 3 piece wheels, or are those rivets fake? I bet 17" or even 16" is a sweeter spot for your J30. Without a doubt, 26 lbs. is about 8 lbs. too much unsprung mass on each wheel.

How strong are they?__________________Brian1995 Q45 & Q45t

Discover the power of the button!

[elwesso]

I want the 17s...... I was thinking of hijacking the 17 alloys off our GTP..... but chances are the bolt pattern isnt right........

[Jeff Williams]

Yea, you might have to get some Eibach 1" lift springs for the 20" wheels. I just wanted to bring the level of conversation back down to my 6th grade education level. My head started hurting.

[Gadgeteer]

Nah, 20's are just too big (not impossible) but too big. 19's would be doable, but waaaayyy to pimp for me.

[elwesso]

17s seem to me to be the perfect mix of flashyness and bling, without going overboard......