nice

 

wheels are great. still straight & in 1 piece.

btw, they'll be up for sale, soon

great drag wheels!!!

you can put some pretty beefy slicks on these things!

 

You should be fine, I have had widened wheels, I have had friends that did it. They are fine. Its jsut these guys on here that are stuck up becuase they spent 3k on wheels to save 3 pounds. Its all braging and being better then someone. Just do what makes you happy. You don't have to spend 5k to look good.

 

Some of the SSR wheels are two halves welded together, like the Type-C RS. Scroll all the way near the bottom where the illustration shows the two different halves. Look closely and you can see the weld. I also know this to be true as that I have the SSR GT2s, which are manufactured the same way:

http://www.rd-tanabe.com/lineup/ssr/typec_rs/index.html

I seriously doubt they would manufacture it this way if such method was an issue.

 

I'm thinking about doing this on my 2004 G35 Sedan. For track events I have 350z Track edition Rays (18"x8 1/2" and 18"x8") wearing Hoosier R6 compound tires, 225 front, 245 rear. I also happen to have a pair of 285 tires that match.

I am thinking of putting the 8 1/2" rears up front with Hoosier 245/35/18's and put 285/30/18's in back on the (currently) 8" wheels, widened to 10" or 10 1/2".

The question is: Should I widen to 10" or 10 1/2". If there will be no clearance issue I'm inclined to go to 10 1/2" so that I can fit 295 or maybe even 305 in the future. (I may go FI one day)

Any opinions? Experience with these width's/offsets on sedans?

I calculate that if I go to 10" it would become a +52mm offset and if I go to 10 1/2" it becomes +58.4mm.

I am not running any spacer, nor can I as the track wheels run just about flush with the fenders as it is. My car is lowered and I've rolled the rear fenders to clear this offset.

 

What he said.

 

10" with a 285 on a sedan is pushing it. If it does indeed clear the inside shocks, then you might not be able to put much camber in the rear because it will be a very tight fit. Also, 285 on a 10" rim will sit very flush, might even bulge a bit on the sides. Measure how much space you have between the inside of the current wheel and your shocks.

 

People & companies have been widening wheels for many, many years. I guess this community is just not very familiar with it yet.

 

nice idea but do you really like the stock wheels that much to do that? i rather buy after market wheels that are wider. but props for something different.

 

Thank you DMK for your sensible sounding input, it is refreshing. Various references, measurements and calculations are all pointing towards 10" being ok for the wheel but likely not for the tire. 10.5" looks like it will hit the inner wheel well lining. The shock is out of the way.

I *think* 10" might work but I'm going to do more research and careful measurements. There is a terrific G35 Wheel Fitment chart (attached) but even it takes quite a bit of interpretation, especially as it offers fitment dimensions based on the suspension at stock height. I'm adjusting the data to account for my ride height and camber based on the differential between what is stated therein and my actual measurements. I am then applying that differential as an adjustment to the data shown for 10" wheels, then adjusting for a variance in offset. i.e. my offset if I widen my wheels 1.5" to 10" will be +49mm. The offsets illustrated for 10" wheels are +55 and +45.

According to this chart with these adjustments, 10.5" will rub, and 10" will not, with a margin of safety, or rather a gap, of about 12mm (not counting the tire)

The adjustments I made are as follows: Stock 350z track edition front wheel is 8" +30 offset. Adding 1.5" to the inside moves the centerpoint inward by 3/4" or 19.05mm. 30mm+19mm= new offset of 49mm.

The chart shows that a 10" +55mm offset leaves 6mm clearance, while 10" with a +45mm offset leaves 16mm. It follows then that the +49 offset will give 12mm. That's before adjusting for modified ride height (if that is necessary). Based on my 8" +33mm offset street wheels having about 7mm clearance to the outside of the fender, I may need to adjust my wheel position measurement inward by 6mm. That will reduce my clearance on a 10" +49mm wheel from 12mm to 6 mm, unless that adjustment is unnecessary. If the guide was written illustrating the clearance at the closest point throughout the entire range of travel, then no such adjustment is necessary, in which case I have 12mm.

Of course the tire itself, the 285 Hoosier, has a rim width of 10", section width of 11.5" and tread width of 10.9". So theoretically at least the tire will likely intrude 19mm inward from the inner face of the wheel. Oops that gives me a 7mm conflict.

Theoretically then, you are probably right, and it probably won't fit. Problem is that this assessment banks on a lot of accuracy with little tolerance for error, while being 5mm-10mm wrong on something is entirely possible, even likely. That could leave me clear, or in a bad spot.

I think I'll go out and take more measurements, and maybe I need to get a pair of 275 tires.

 

They look good, the offsets are perfect, they are strong and light, and widening them costs less than $500. If I sell them for $700 instead, that gives me a $1200 budget before I'm into more money, and then I've got to find just the right size and offset all over again, besides bothering to sell these. You can't buy custom wheels of the quality of forged Ray's for anything like $1200. As far as doing something different...it's been done, but mostly on 350z's and G35 Coupes. I'm just trying to push the limit without tubbing the wells on my sedan and I happen to have a pair of 285 Hoosiers I'd like to use if I can.

 

Impressive. I liked the point made about multi-piece rims.
Seems logically sound. Looks scary. Driving impressions
under power?

 

Hmm. Just went out and reexamined and remeasured both 285 tires and the wheelwell. You are right, it's pushing it. The 10" wheels might fit, but the 285's WON'T.

Shock to Fender measures 11.3". The 285's are 11.5". They aren't going to squeeze in.

Having more carefully measured up everything, I believe I can fit 10" wheels, that the +49 offset will work, and that the biggest tire that will fit, in the Hoosier anyway, is a 275/35/18. With a section width of 10.7" there should be 0.5" to spare, or .25" each side. How much of that goes with a bit of camber is anybody's guess.

The more I think about that though, the more I think that it could easily cause problems anyway, and I would spend $500 widening to invite the problem.

I can fit a 255/40/18 onto the stock 8.5" wheel. It's section is 10.6", giving about .6" to spare overall, or .3" each side. That's probably close enough.

Well, I think I know my choices at this point. 255/40 on the stock 8.5" wheel works and has a section of 10.6" and a tread width of 9.8"

275/35/18 will probably fit if I widen my wheels to 9.5"-10" but might rub. That's set me back over five hundred bucks plus getting used 275's. Probably $750 in all. Tread width would be 1.2" wider than 245's. 255's would give a 0.7 " increase for just the cost of the tires..

The extra 1/2 inch gained with 275's is too expensive to warrant the widened wheels, and the 285's won't fit at all. I guess I should keep an eye out for 255's not. Anybody want to trade 255/40ZR18 for my 285's??