wheels question

[1991q45]

i seen a set of wheels 16 x 6.5.the wheel offset i belive is 45mm.there was a post sating it was okay bu a couple of other people said that it was'nt correct.

so is it fine to run 16" wheels with an offset of 45?

[Q451990]

The offset and width is the same as the OEM wheels. You're an inch taller, so you would probably want a tire with a shorter sidewall to keep the overall diameter as close to OEM as possible.

Just be careful that your target wheels have a sufficient load handling capicity to stand up to the abuse the heavy Q with it's negative camber dishes out. Same for the tires.

Here's a nice calculator that makes it easy to see what different wheel offsets will get you as compared to your current wheels. http://marksink.com/tire_wheel_offset/offset.html

Heath
Modified by Q451990 at 12:29 PM 8/23/2009

[Q45tech]

That's an interesting point about the camber and the wheels I really never covered. Most can see the effects camber causes on the tires. Double and triple inside wear rates depending on amount.

Obviously 97> present have little static camber [ unless lowered] so these oem wheels can be made with relaxed specifications.If you test wheels for balance without tires you will see the steady pounding takes its toll on the inside of rim [because it's an unsupprted circle unlike the front].

Even oem 90-94 [all I've tested] get seriously out of spec after a few years. WHY I'VE HAD TO PEPLACE 3 sets of them. I appears on GA, NC, SC, FL roads that these wheels are only good for 100K/7years with the 90Q weight and camber.

It is always important to know whether the tires or wheels are the culprit in the out of balance result.

Remember OEM SPECS require no more than 10 grams per edge for any reason [probably to extend wheel bearing life]!

[qship96]

The offset is the same as the OEM wheels, but you're 1/2" wider.

So:

-1991 OEM 15x6 45mm-your wheel 16x6.5 45mm-1997 OEM 16x7 40mm

I'm running the 1997 OEM wheels on my '90 and have had no rubbing issues. Just be careful that your target wheels have a sufficient load handling capicity to stand up to the abuse the heavy Q with it's negative camber dishes out. Same for the tires.

Here's a nice calculator that makes it easy to see what different wheel offsets will get you as compared to your current wheels. http://marksink.com/tire_wheel_offset/offset.html

Heath

Modified by Q451990 at 2:32 AM 8/23/2009

I am pretty sure all 90-96Q factory wheels are 6.5 inches wide, NOT 6.0

[Q45tech]

I tried 300zx 16 x 8 wheels as an experiment. They seemed to bend much faster than Q oem so I sold them within 6 months. Obviously they were designed for a lighter vehicle.

If you go larger in size I would recommend that they be forged vs cast or thicker not just heavier in decoration.

The major problem is the weight of larger tire added to weight of larger wheels.

Since Michelin is lighest weight tire in a size with same specifications. It makes it really tough to not go FORGED even in a 1-2 size increment.

Just 3>4 pounds increase makes a significant change in handling and braking.

[elwesso]

i seen a set of wheels 16 x 6.5.the wheel offset i belive is 45mm.there was a post sating it was okay bu a couple of other people said that it was'nt correct.

so is it fine to run 16" wheels with an offset of 45?

long story short, you should be OK to run those... as heath said!

[maxnix]

I tried 300zx 16 x 8 wheels as an experiment. They seemed to bend much faster than Q oem so I sold them within 6 months. Obviously they were designed for a lighter vehicle.

Interesting as those are forged. I don't recall you mentioning you had actually mounted them. Which tires? Did the wheels bend in that 6 month period? I ask because I am certain you spun them up and measured lateral and radial run out (you had rejected some previously for not meeting OEM specifications), so I wonder how much they changed?

long story short, you should be OK to run those... as heath said!

Provided, as Q45tech says, you confirm they meet OEM specifications as published in the FSM. Any used wheel or cheap wheel should be verified as still within dynamic balance and run out specification, provided it is structurally sound. Moving used parts are always a crap shoot.

[Q451990]

I am pretty sure all 90-96Q factory wheels are 6.5 inches wide, NOT 6.0

You're absolutely right... just checked that owner's manual again. Just corrected it in my other post too.

Heath
Modified by Q451990 at 12:26 PM 8/23/2009

[1991q45]

well they're nothing fancy...you guys are gonna laugh.they're from a 99 nissan quest se.the van came in at work today i think under the cfc.

but they're fat 5 spoke.and it's better than whats on the q now.

the tires that are on the 16's are goodyears...brand new. 225/60/r16. i should go with something smaller?

[maxnix]

Has to be minimum 94 load rated and H speed rated. Good to be under UTQG of 320.

[Q451990]

There are several tire size calculators available if you run a google search.

Here's one. http://www.miata.net/garage/tirecalcold.htm

The new tires are .6 inches larger in diameter than the stock ones. Which is a minimal difference... especially if you're getting these for free.

I wouild make sure they're at least 95H rated. Maybe even S rated, but make sure you're aware of the limits on the maximum speed you can travel if you go with anything under a V rating.

Heath

[MinisterofDOOM]

The new tires are .6 inches larger in diameter than the stock ones. Which is a minimal difference... especially if you're getting these for free.

Especially considering that outside diameter unloaded (which the calculator works with) is not the same as loaded outside diameter. I'd bet those two wheels are nearly identical in height once under the weight of the Q. With lower profile tires that's not always the case, but with 60+ aspect ratio tires you're looking at a lot of "squash" at the contact patch. The variance is probably less than an eighth of an inch. Not enough to even affect the speedo noticably.

[elwesso]

the tires that are on the 16's are goodyears...brand new. 225/60/r16. i should go with something smaller?

I'd say you can slam those things on there and youll be all set, should be perfect! Take some pictures..

Most people run a little taller tire anyway for more load capacity, most 225-60-16 are 98 load so you're perfect!

[1991q45]

wow...damn. i'm shocked i thought you guys were gonna bust on me for rockin some 5 spoke quest rims.

[Q451990]

You just caught us on a good day

[1991q45]

rofl!!!