Crawford Z says to use same size tire even on 06 G35C with sport suspension

[eZg001]

I recently went to Crawford Z in Nashville to have a catback system installed. While I was there I thought I would pick his brain about a solution to uneven front tire wear.

His suggestion was to run the same size tire all the way around so that they can be rotated. He also said that people might say that it will effect the VDS and that he was sure that it would NOT.

After getting negative feedback about the Sumo's I was thinking of the Toyo Proxy 4's but am not sure about using 245/40-19's on front and back.

Anyone tried this approach?

[WESIDE]

Well for starters, The rear rims are wider than the fronts. I am not sure what size difference but they are. I am not sure what help this will be but I just recently put 275-35-19 on the rear and 245-35-19 on the front. Its has much more of an agressive stance.. If you were trying to mach tire sizes I think you would have to go back to a previous set of 18 inch that may be same all around???????? WEs

[heliochrome85]

G35 coupe wheels cannot be rotated. its due to 2 factors. 1) rear rim size is different from front rim size. 2.) the camber settings on the tires are set so the car handles better. the only way to even out the tires is to pop them off the rim and swap them across the axle. either way, not worth it since it only adds a few thousand miles to the tires and is not cheap.

[C-Kwik]

I recently went to Crawford Z in Nashville to have a catback system installed. While I was there I thought I would pick his brain about a solution to uneven front tire wear.

If you are experiencing uneven wear across the thread of the front tires, have your alignment looked at. When I had my G, the front tires wore pretty evenly. In fact, I still have 2 sets of the front tires I used on the G in my garage and they have even wear.

Do you have any suspension mods btw?

His suggestion was to run the same size tire all the way around so that they can be rotated. He also said that people might say that it will effect the VDS and that he was sure that it would NOT.

I've seen G35's and 350Z's have VDC issues after using tires of the wrong size. They require a staggered diameter tire, front to rear. Sure, you can get around it by turning the VDC off each time, but that isn't exactly convenient.

[RED_DET]

Only the 17" and 19" g35 coupe wheels are staggered. The 18" wheels are the same size, only the tire is staggered, so it would be possible to run the same size tire on them.

[eZg001]

On the 19" sport package I think the front wheels are 8" and the rear 8.5". I knew the wheel widths were diff., and I THOUGHT Mr. Crawford knew that as well. That is why I didn't run out and take his advise, even though he is well thought of in the Z community.

I have no suspension mods. Purchased the car @ 12K miles had the front two tires taken off and remounted on opposite side @ 15K miles but perhaps it was too late to avoid the dreaded "ROAR."

Before I spent $$$ on a new set of tires I wanted to at least have a plan in place to avoid uneven wear. I was thinking about aftermarket arms on the front. something like Cusco. I have a alignment plan and get the car aligned every 3K miles.

Thanks guys

[heliochrome85]

also, where are the pics of your car?!?!

[C-Kwik]

You didn't answer my previous question as to whether or not you had suspension mods.

Before I spent $$$ on a new set of tires I wanted to at least have a plan in place to avoid uneven wear. I was thinking about aftermarket arms on the front. something like Cusco. I have a alignment plan and get the car aligned every 3K miles.

Unless you know what specific alignment issue you have (if any), don't expect an aftermarket suspension arm is going to automatically solve your tire wear issue.

And getting an alignment every 3 months is just a waste of money unless you curb your wheels pretty hard every three months. The alignment of a car should remain static until bushings start wearing out or damage occurs. As such, if the alignment settings stay the same each time you get an alignment, tire wear isn't going to change.

[eZg001]

C-Kwik-

while I am humbled by your extensive knowledge......the second paragraph, first sentence states that I have no suspension mods.

I aslo stated that I have an alignment contract which means That I don't pay for multiple alighments since I paid something like $129 for three years of alignment coverage.

I DO appreciate you posting so don't think I am being a smart a$$.

The tire noise is worse during braking, just like my 03 350Z......so I assume the tires are feathering. I heard that Nissan fixed the Z's with front suspension redesign in 06 so I just assume the G's were fixed as well.

I have never been able to see the uneven wearing in my tires or even feel with my hand but I can certainly hear PLEANTY of noise.

Any further ideas?

[eZg001]

heliochrome85-

I actually took pictures last night to post in your "Why Athens blues is the best color" thread. Started reading up on how to post pictues this morning at work. I baulked at paying for Iserve and didn't have time to register at Ibucket.

I JUST got my FI exhaust with Titanium tips......and while yes, a tad ricey......I still like them particularly with the blues working together. I hate that I sound like an interior designer.....but I AM a furniture designer. I also wanted to "Take a path less traveled upon"- Robert Frost.

I'll send a couple to your email.

George

[C-Kwik]

I totally missed that line man. My apologies. Without mods, there really shouldn't be a need to replace the suspension arm. If the alignment can't be brought back into factory spec, then it would be advisable to locate the reason why instead of potenitally bandaiding the problem (which could make it worse).

Even if you have an alignment contract, there is no reason that you should need an alignment that often. Conceivably, you could take it back in and the alignment would be where they set it and they change nothing. This would not solve the problem.

If you can't observe the tire wear, especially by feel (feathering is usually detected by feel first), then perhaps its simply just tire noise. Tires tend to develop more and more noise as they wear. And more so with performance tires. It could be normal. Perhaps when its time to replace, read over some reviews on tires you would consider. Particularly from those who have put on some miles on the tires. Tire Rack has a pretty good review section. I have heard Michelin spends more money on tire noise reduction than any other tire brand. Might be worth looking into.

[heliochrome85]

just put them on flickr. its free. dont pay for photohosting...

flickr.com

[RED_DET]

If the tires are actually feathering, you will definitely see it and most definitely feel it with your hands.

[eZg001]

For the sake of arguement, let's say that it IS feathering....which I believe it is......what would be the best fix? Cusco A arms?

I kinda think this is a common problem wether we want to admit it or not. I had the SAME EXACT symptoms on my 03 350Z. The main sympton being road noise that increased during braking from about 35 mph down to15 mph or so.

I would like to do SOMETHING before slapping major bucks on a new set of tires.

Thanks,

George

[AFE712]

Here the dealer put same 4 tyres and wheels on the coupe for winter. I'm sure it's not a good thing especially for the external diameter not being different front to rear, ABS must be too sensitive in that case.

I suggest best quality tyres. This car deserves no less.

[C-Kwik]

Feathering is generally caused by an incorrect toe setting. Aftermarket arms generally only allow a camber adjustment, which you should not need. Toe adjustments are made by adjusting the tie-rods. They are adjustable from the factory so all that is needed is an alignment.

[RED_DET]

Amen.