Jump to content

Sign in to follow this  
Peter260

215/60 or 225/60 on 14x7

Recommended Posts

ignoring cost (assuming all options are the same cost), which is better on a 30mm lowered s30 on a 14x7 wheelset with zero offset.

better on 2 levels:

- handling

- looks (more importantly!)

options

- 215/60/14 all round

- 225/60/14 all round

- 215/60/14 front, 225/60/14 rear

does skinnier front not work in an s30s favour for handling? experences?

looking at BF goodich ta (white letters) in all outcomes.

thanks,

Peter

Share this post


Link to post
Share on other sites
post-13827-14150817514853_thumb.jpgI put 205/70/14 Ta's on mine all around because I wanted to rotate the tires when the backs start to wear. I also wanted to make the wheel and tires to look better in the wells. My car is all stock for the suspension.

post-13827-14150817514456_thumb.jpg

Share this post


Link to post
Share on other sites

From a handling perspective I would use the same size tires all around. The Z understeers; smaller from tires will make this worse.

Share this post


Link to post
Share on other sites
From a handling perspective I would use the same size tires all around. The Z understeers; smaller from tires will make this worse.

I'll second that one. It's a very good point, let alone the tire rotation factor, although I suppose if one never drives the car hard they'll never tell the difference.

Share this post


Link to post
Share on other sites

I am not overly worried about the tyre rotating side of things.

the handling a bit -

will 225s fit in the front was the other thing?

I would have thought on 7" wide rim 215 or 225 would be a better fit than 205?

Share this post


Link to post
Share on other sites

I had 14X6 mags with 225s and then switched to 16X7 Panas with 225s. Front and rear fit without rubbing in both cases. Take note, however, that I'm using a Xenon air dam up front and not the stock valence. I believe that's where the rubbing issue tends to be.

Share this post


Link to post
Share on other sites

With the lowered suspension I think the 225 will rub up front, I run 235's and they rubbed before I went with the stiffer springs. The 205 fronts and 225 or 235 T/A's in the rear will fit and I don't think the under steer will be worse than the stock tire size was. Beware the T/A's, they are the easiest to find in these sizes in 14 inch, but they are a PITA to ballance and they are notorious for being out of round. Excperience talking here, read this http://www.classiczcars.com/forums/showthread.php?43905-Death-to-the-death-wobble&highlight=death+wobble

Share this post


Link to post
Share on other sites
I had 14X6 mags with 225s and then switched to 16X7 Panas with 225s. Front and rear fit without rubbing in both cases. Take note, however, that I'm using a Xenon air dam up front and not the stock valence. I believe that's where the rubbing issue tends to be.

I forgot to mention, this is with the car lowered by about 1.5 inches.

Share this post


Link to post
Share on other sites

We have run 225/50-15 tires on 15 x 7 wheels on our car without any rubbing. We have Tokico lower springs and have the original valance. With wheels that have an offset of about -1 inch (toward the center of the car) we need a 1/4 inch spacer in the front to prevent rubbing on the spring seat. With wheels that have a zero offset we do not need the spacer. With a 205/50-15 we do not need the spacer with either wheel.

Share this post


Link to post
Share on other sites

thanks all for your responses. after much deliberation i am going to first hunt for 215/60 all round, and see how i go.

- decided same front and back - probably the best thing

- 225 would probably rub up front from the above so best leave some room in the there by going to a 215;

BFs are the likely outcome simply because they are one of few!

cheers,

Peter

Share this post


Link to post
Share on other sites

Peter,

One last input before you make your final decision.

I run old 14 x 6.5 Appliance rims and just recently got new tires. Went through some of the same gyrations on tire sizes and ended up settling on 225 60 R14. Went with the same BF Goodrich tires you are considering and it all worked out really well.

My suspension is lowered by maybe one inch but otherwise is stock. As you can see from the attached pictures, there is plenty of clearance and I have no rubbing issues so far.

Hope this helps.

Mike.

post-19584-14150817557457_thumb.jpg

post-19584-14150817556497_thumb.jpg

post-19584-14150817556804_thumb.jpg

Share this post


Link to post
Share on other sites

Mike, you have to take into account that you are using a Xenon air dam, just as I am. I've had no issues with rubbing either, but I haven't tried a stock front valence.

100_9986-1.jpg

Share this post


Link to post
Share on other sites

thanks for the shots. 225 looks ppretty smart. I am noticing its a little bit chubby at the back in the third shot.

question is do i want a the ' 14's on fats' look.

cheers.

Share this post


Link to post
Share on other sites

205/60-14 and 215/60-14 is too small of a diameter, looks weird. 225/60-14 is closer to the 25" stock diameter but the steering is going to be heavy on the front end. I'm running 205/60-15 on 7" fronts and 225/55-15 on 8" rear on a lowered strut and spring suspention. The ride is harsh in part to the size of the tires, the wider the tire the harsher the ride. I do rub a bit in the rear when I bottom out. I'm going back to stock height with 14x6 slots and I'm looking at 195/70-14 because of the right size overall diameter. Ride should be good and steering will be a bit lighter. 225/60-14 is close to stock diameter but the steering is going to be heavy like an old truck. I like the way my car looks and the handling is just plain insane but I sure hate the ride and I drive it most of the week.

Share this post


Link to post
Share on other sites
205/60-14 and 215/60-14 is too small of a diameter, looks weird. 225/60-14 is closer to the 25" stock diameter but the steering is going to be heavy on the front end. I'm running 205/60-15 on 7" fronts and 225/55-15 on 8" rear on a lowered strut and spring suspention. The ride is harsh in part to the size of the tires, the wider the tire the harsher the ride. I do rub a bit in the rear when I bottom out. I'm going back to stock height with 14x6 slots and I'm looking at 195/70-14 because of the right size overall diameter. Ride should be good and steering will be a bit lighter. 225/60-14 is close to stock diameter but the steering is going to be heavy like an old truck. I like the way my car looks and the handling is just plain insane but I sure hate the ride and I drive it most of the week.

I had no trouble with my steering running a 225/60-14 up front, when compared to 205mm or 195mm wide tires. It's not going to make your steering "heavy like an old truck".

A harsh ride, when attributed to tires, would be mostly due to the sidewall height/stiffness (not width) of the tires. With regard to street tires, a 70 series will be softer than a 60 series, which is softer than a 50 series, etc. Yes, 195/70-14 will make it ride better, but corner worse due to more sidewall flex.

I do rub a bit in the rear when I bottom out.

This is the reason for your harsh ride, you're bottoming out your suspension! At that point, your ride will be harsh no matter what tires you use. If you don't like the ride and are bottoming out, it's time to do something about your suspension.

Share this post


Link to post
Share on other sites

Wrong, the width of a tire will matter in ride quality, putting wider tires on the front end will make it heavier, and I said when I bottom out they rub, If it's lowered it's going to bottom, that is if you drive the damm thing. I'm not running around scaping bottom all day. With 50 yrs behind me working on cars I think I know how to work on and setup suspension, not my first Z. Standard tire on the car was a 175SR14 that's what the car was designed for adding 4+ inches to the track will make the steering heavy, sorry but that how cars with no power steering react when you throw on wider and heavier tires, go figure. I never said he would have trouble I said streering will get heavy.

Share this post


Link to post
Share on other sites
With 50 yrs behind me working on cars I think I know...

Oh boy, if I had a penny for every time I heard those words...

Could you then please explain how tire width affects ride quality? Could you show any testing to prove so?

Wrong, the width of a tire will matter in ride quality, putting wider tires on the front end will make it heavier, and I said when I bottom out they rub, If it's lowered it's going to bottom, that is if you drive the damm thing

You really think that a lowered car should bottom out? That is exactly what you're saying. When your suspension bottoms out, your spring rate becomes that of your chassis (gets very stiff, very fast). This creates a harsh ride. This is what you said earlier:

The ride is harsh in part to the size of the tires, the wider the tire the harsher the ride. I do rub a bit in the rear when I bottom out.

If you bottom out, your ride will be harsh, no matter what. If you have shocks with too much compression damping, your ride will be harsh. If you've lowered your car enough to leave only and inch or two of bump travel, then you will be bottoming out a lot. Changing tire width will absolutely not help this. Changing sidewall height will make the ride softer, at the expense of handling (repeating myself here).

Standard tire on the car was a 175SR14 that's what the car was designed for adding 4+ inches to the track will make the steering heavy, sorry but that how cars with no power steering react when you throw on wider and heavier tires, go figure. I never said he would have trouble I said streering will get heavy.

If you don't mean to imply that he's going to have trouble, then why mention it at all?

Also, where are you getting this extra 4+ inches of track? Track width stays exactly the same, given that you're using wheels with the same offset and just changing tires.

You can say that the steering will get heavier, but it sure won't "be heavy like an old truck" unless your old truck's steering felt like a Z-car's. Going to 225mm wide tires is not going to make the huge difference that you make it out to be. The effect is minor, especially considering that the OP is choosing between a 215 and 225...

The steering will be noticeably heavier if your new tires are "stickier" than the old ones (as is often the case when upgrading to a larger tire).

I know you want to start an argument, but I'm just clearing up the facts for the OP so that he can make a wise decision. Pete, your steering effort and ride will be largely unchanged since your keeping sidewall height close to equal (staying with 14" wheels). Your decision to not go with staggered sizes is a good one with regard to handling, and if you're running the stock front valence then I think anything wider than a 205 is going to start getting close. A 215 should fit up front, but see if the tire shop can put on one tire to test fit and turn the steering through its range of motion. You should do this with the suspension compressed as well, but the initial test should give you a rough idea.

Share this post


Link to post
Share on other sites

thanks all for your replys;

i will be running a front spoiler so there should be room there for 215;

In terms of ride/handling i wouldnt go to 70 series; 50 series is really only on 15" wheels and bigger leaving me with 60 series the lowest series on 14s i could go to and try and get close to maintaining rolling diameter.

I am aware that the sidewall of a 215/60 is around 0.7cm*2 = 1.4cm less than the original 195/70.

(simply by multiplying 0.60*215 compared to 0.70*195)

But i am going down by 3.0cm in lowering height so i am guessing this will negate out any issues around gap.

I hope its low enough.

Share this post


Link to post
Share on other sites

I've seen your car, I'm not going to bother with this fight you seem to want. Have a nice day Mr mechanic

Share this post


Link to post
Share on other sites

You might look at the speed rating when deciding how you want your car to ride. The lower it is, the nicer the ride. RS3's and Star Specs ride like an A6 which you can drive on with NO air in. The stiff sidewall is great for handling but not so great for a nice Sunday afternoon cruise with your sweetie. Width is only one of the factors on hitting in the front, height is the another. A shorter tire with more width will not be as likely to hit. Keeping the tire all the way inboard (offset) will also help to not hit the valance.

It has been my experience that lowering springs usually bottom out unless you do something to prevent it. Shortening the struts is a good way to stop that.

Hope that helps with your decision and doesn't just confuse you more. Sometimes I think my head will explode with all the decisions about how I want my Z.

Good Luck, logr

Share this post


Link to post
Share on other sites

These tire and rim discussions are always so lively :ermm: and...confusing to say the least. :ogre:

I'm glad someone tried to restate the bottom line facts for the OP. It helped me too. Thanks.

I have BF Goodrich T/As on my '56 Bel Air, and I love them. 245/60-15s in rear and 225s in front.

I was tempted to pick up the T/As for my Datsun 240z as well. The market for 14" tires right now is horrible.

After calling about 8 big box and local tire dealers, their stock was unimpressive. Only 70mm sidewalls, 175-195 width...and all no name brands.

After scouring about 20 websites, I now have the latest Falken Ziex ZE-912 28921452 - 195/60R14s headed to my house in 4 days for $292 with tax and shipping. They are an all season performance tire rated to 65,000 miles.

I'm curious what the OP will choose. I went with the 195s because I like the idea of a little less weight to drive with. My car doesn't currently have much power over stock besides a header, balance tube and emissions gutted, and N36/3 screw set-up. I will be putting an air dam on as well.

My next set will be a summer performance tire, with 215/50-15s in the front and 225/50-15s in the rear, along with nice superlite DOT rims.

Share this post


Link to post
Share on other sites

Last night I saw a guy I know putting new Dunlop 195 60 14's on his Miata. I forget the model, but they were a sticky street tire that he is using for autcross. He said they were about $100.00 each. For me that would be kind of pricey for a daily driver set, but he bought a separate set of wheels for them just for autocrossing.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
Sign in to follow this  

  • Recently Browsing   0 members

    No registered users viewing this page.

  • Who's Online   17 Members, 0 Anonymous, 69 Guests (See full list)

  • Search Engine Meta Tags:
    classic, z, datsun, 240z, 260z, 280z, zcar, zed, s30, classiczcars.com, 240z.org, fairlady, 240, 260, 280, nissan, 240 z, 260 z, 280 z, zx, turbo, classic z, 280z cars, cars 240z, car forums, datsun, nissan, cars datsun, car club, 280zx, car, nissan zcar, classic z car,performance,300zx, car years, car raced, texas 350z, 300z, 350z, nissan racing , clubs car, zcca, club datsun
×

Important Information

By using this site, you agree to our Terms of Use.