[dm4]

Why does there seem to be an accepted belief that front and rear tire widths need to be different. It is my understanding that when the rear tire width is increased with respect to the front tire width understeer is increased. When front tire width is increased with respect to rear tire width understeer is reduced. Almost all vehicles are designed with understeer, the 350 included. Does it not seem logical to put equal width tires on the front and rear of the 350?

 

[bluedragonz]

[/quote]


That's an interesting notion. I don't anything about this topic so I'd love to hear more about it.

 

[toykilla]

doesnt it come from the factory like that? also i think it has more to do with looks.. i dont think you can fit a 275 up front?

 

[illz33]

Sure you can and will reduced understeer that way but the sizes do fall into the stock suspension tuning. Which, again means it will understeer.

I know of a Z with 265 front and back. It's for track use, but none the less, it reduces understeer.

A lot of Japanese Z's that I've been seeing in Options and BMI aren't as different as "our" 245/275 aftermarket setup. They tend to stick to 245/255 or 245/265. I'll go watch them all again just to verify

 

[blackzr]

I'm deciding between putting 245 or 255/35 tyres on the front wheels. I would prefer to put the wider tyres but am afraid that it will have rubbing issues.

My car is also lowered 1 inch.

Thanks

 

[blackzr]

Oh i forgot to mention:

wheel specs are
19 x 9
Offset + 28

If people could also mention their tyre brands

Thanks heaps

 

[studybuddy]

I'm pretty sure the 255's would fit. I have 245's on mine right now and I'm lowered with the Eibach springs. I don't even come close to rubbing, so I'm pretty sure you could pull off the 255's, especially if you're running a 19x9. I'm only running a 19x8.5.

I'm running Hankook Ventus tires in the front (Came with the wheels) and Bridgestone SO-3 Pole Position's in the rear. 245/35/19 & 275/35/19

 

[blackzr]

Thanks. I just needed a little reassurance.

 

[studybuddy]

Well, don't be mad at me if they don't fit I'm pretty sure you should be fine though.

 

[TSur]

I saw a 350z with 19’s and the back rims had 40 series but the front was 35.

I had 35 series on another car and blew 2 tires in a month so the lowest I want is 40.

I really like the looks of 19’s so just wondering if this is ok 2 do or if there would be any issues with having 19's with 40's in the front.

 

[studybuddy]

35's really aren't an issue if you're careful. I haven't had any problems yet at least.

I'm pretty sure 40's will fit, but it's going to throw off your spedometer a lot.

 

[paperjohn]

Use the 1010 tire calculator to compare different sizes to stock sizes and don't go over 3% stagger. Here is a link
http://www.1010tires.com/TireSizeCalculato...p?action=submit
Tire Size Calculator - tire & wheel plus sizing

 

[TSur]

When I go to tirerack.com it said if I use 19's that the tire size should be this: 225/40R19 vs the stock 225/50/17 and the back would be 245/40/19 from 235/50/17

From the link you sent me I it shows that Speedometer Difference will be about .6mph slower then it should be with the front tires being 40s.

I just wonder why people are going with 35s. tires if the 40's would fit fine?

-----------------------------------------------------------------

Section Width: 8.85 in 225 mm
Section Width: 8.85 in 225 mm

Rim Diameter: 17 in 431.8 mm
Rim Diameter: 19 in 482.6 mm

Rim Width Range: 6 - 8 in
Rim Width Range: 7.5 - 9 in

Overall Diameter: 25.85 in 656.59 mm
Overall Diameter: 26.08 in 662.43 mm

Sidewall Height: 4.42 in 112.26 mm
Sidewall Height: 3.54 in 89.916 mm

Radius: 12.92 in 328.16 mm
Radius: 13.04 in 331.21 mm

Circumference: 81.21 in 2062.7 mm
Circumference: 81.93 in 2081.0 mm

Revs per Mile: 804.6
Revs per Mile: 797.5

Actual Speed: 60 mph 100 km/h
Speedometer1: 59.4 mph 99.1 km/h

Speedometer Difference: - Speedometer Difference: 0.890% too slow
Diameter Difference: - Diameter Difference: 0.89%

 

[ZGarage]

What are the widest tires that will fit on a stock Z? And what rim width and offset are needed?

Sport compact car reccomends 275/40/18 front and rear with 18/9 +30F and 18/9.5 +25R

http://sportcompactcarweb.com/projectcars/0404scc_350z/

 

[lionkiller]

I was just reading that article! Thinking about going this route instead of 'staggered'...I like the staggered look, but the 1g skidpad is enticing, & easily attainable!

At least we can bolt on some handling!

 

[studybuddy]

Sway bars will dial out any oversteer and oversteer you have.

I'm not sure what the answer to your question is though, but I am curious to find out also.

 

[KShep]

There is an owner in AL running F/285 & R/305...had to roll the fenders though.

 

[jetpilot718]

I was liking what I read until I saw this:

Our Performance Package Z is, thankfully, free from such electronic ninnary

Could they have bothered to check if the Performance edition had or didnt have VDC BEFORE they strapped on all this gear??

 

[lionkiller]

Originally posted by StudyBuddy@Jun 28 2005, 11:14 AM
Sway bars will dial out any oversteer and oversteer you have.

I'm not sure what the answer to your question is though, but I am curious to find out also.

[snapback]123327[/snapback]​

From the article: "...that the rear tires Nismo uses on the Z--275/40ZR-18 BFGoodrich g-Force KDs mounted on 18x9.5-inch wheels with a 30mm offset--actually fit the front perfectly..."

 

[studybuddy]

In the issue where they tested all of their SCC project cars however, they could not find traction at all in the Z. It came in last place because the track was wet.

I'm not saying that you will be driving crazy with a non-staggered setup in the rain, but the way they described it it was scary to even think about.

Got beat by all sorts of cars that it should have beaten, even in the rain.

Just be careful. There are other ways to dial out understeer.