Any idea on approximate max widths for both HICAS and non-HICAS models?

I see, that's good to know, thanks.

Any ideas how wide you can go with tires in the rear?

Just as an FYI...on of the infinti techs on this board had brought up questions regarding suspension stress with fatter tires.

If and when you do it, please report back with your results.

If you buy a car with HICAS, I wouldn't recommend putting fat tires or big tires on the J. The HICAS systems lets the car handle like its on rails with no body lean. You'll love the "I didn't know that car could do that" look that newer Bimmer, Audi, Mercedes drivers get when you pass them on a curve or switchback without slowing down while in full control of the car.

Thanks for all your help thus far driverdriver

Can you tell from the VIN if a car has HICAS or not? From what it sounds like, it would be not optimal for my purposes. If I buy a J30, it's going to end up with a turbocharged VH45DE or VH41DE in it making somewhere in the 600 wheel horsepower range most likely, so big tires are going to be a necessity unfortunately (I'd like to get a 275mm wide tire under there, since that's a very, very common tire width among max performance and drag radial tire manufacturers). I know i'd be pushing in to virtually uncharted territory, but any insights people can provide help cross just one more question off the long list of questions that need to be answered when it comes to a project of this magnitude.

Or a Heavy duty Manual tranny
The stock J tranny like go out quickly as one of our members found out when he put a twin turbo 300zx engine in his.

If I ever do it that is lol, it's all a pipe dream right now but I've got the tools at my disposal but whether or not I'll decide to tackle it is another question. If I'm limited to some skinny little tire, that could be trouble and is a major factor in how the car would perform.

Roll the fenders and put some big A$$ drag radials on it !!!
Pics are a must !!

I would if I had access to one. Hopefully I see one parked somewhere and I can poke my head underneath and get a quick look to make an estimation. Does no one run wide tires on the back of these, if even just for looks? I'd have thought this would be a fairly common practice, the stance of the J30 is just begging to have a nice wheel and tire put under it.

Cheapest place to find it is:

http://www.everythinginfiniti.com

If you can't find it, in the online catalog, call the number and ask to speak to Joe. Tell him your a nicoclub member.

Tire size is never limited my friend. You are only limited by your budget and skills at body work and simple offset calculations. If we can fit 315/30/18's under the back of factory body 240's, we can get pretty close to that on the back of a j30. I notice in the j30 section of nico there is alot of negativity when it comes to peoples ideas. This section needs more positive support.

BTW I cleared 275/35/18's with a 18 x 9.5+24 offset wheel with ease. If I get bored this weekend I will pull the rims of my 240 and remount them to my j30 and take some pics.

thanks again.

do you have any reason to believe there would be significant interference issues under hard cornering or launching when the suspension compresses?