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post #1 of 38 (permalink) Old 08-07-2011, 09:21 PM Thread Starter
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17x9 tire sizes sizes

What size tires are you guys running with 17x9 wheels? My wheels came with 275/50/17 I believe. I am figuring i will need a 245 for the front but how about the 275 for the rear?
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post #2 of 38 (permalink) Old 08-08-2011, 08:47 AM
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It can be a bit tough to get a tall enough tire in 17" to suit an MN-12. 245/50R17 is a very close match to the diameter of the original tires. Going with 9" wheels limits the choices a bit too. If you want staggered sizes front and rear, maybe 255/45R17 and 285/40R17, which will be about 1/2" shorter than originals.


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post #3 of 38 (permalink) Old 08-08-2011, 09:01 AM
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I'm using 255/45, speedo is about 2% off. I'm going 68 when the speedo says 70. They fit very well.

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post #4 of 38 (permalink) Old 08-08-2011, 09:10 AM
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On the Lemons race car, we are running 275/40/17s on 17x9s at all 4 corners.

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post #5 of 38 (permalink) Old 08-08-2011, 10:37 AM Thread Starter
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Great info, thank you guys. I really need to nail down the tire sizes and have the tires on the wheels before i start my swap. The wheels have 275s on all 4 right now. 2 look good and 2 are worn out and need replaced. I was thinking of leaving the 2 good 275s on the back for now and then i would only need to get the 2 front tires to have good tires on all corners. Looks like 2 of you suggested the 255/45r17s. I'm not necessarily going for the staggered look, but I have 2 almost brand new 275 tires. I am just being cheap by not replacing them right off the bat.
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post #6 of 38 (permalink) Old 08-09-2011, 08:31 AM
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But if they are 275/50/17, they will be almost 28" diameter ... stock diameter is 26.6". Pretty sure that is going to rub, especially if the car is lowered at all.


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post #7 of 38 (permalink) Old 08-09-2011, 11:17 AM
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I have 275/45/17 on all four corners and no rubbing at all.

But I do have the SN95 swap with 17X9 cobra rims.

And also am lowered 1 1/2.

But with the fronts being so wide it tends to track any ruts in the road so I would not go that wide again maybe only go to 245/45/17. but 275 or 285 in the rear looks great.

View my pics in my photobucket.
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post #8 of 38 (permalink) Old 08-09-2011, 12:41 PM
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I don't think you do, since nobody makes that size.

Do you maybe have 275/40/17?



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post #9 of 38 (permalink) Old 08-09-2011, 01:51 PM
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255/45/17 here, tallest I could find for my 17x9s, though I might try 285/40 in the future (both are 26")

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post #10 of 38 (permalink) Old 08-09-2011, 01:54 PM
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255/50/17 is an option as well, but many of the ones available in that size are sport truck tires. They are about 27" diameter, slightly taller than stock.


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post #11 of 38 (permalink) Old 08-14-2011, 08:05 PM Thread Starter
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just to clarify my tires are currently 275/40/17s on the wheels I have. They aren't in bad shape at all. i will likely use these tires until i buy some new ones really soon. I want to see how I like the width in the front. If they don't follow the groves in the road too bad I may keep the same size on the front. I have a feeling I will want a little skinnier on the front though. I will keep everyone updated here and in my project log thread in the newbie section as well.
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post #12 of 38 (permalink) Old 08-15-2011, 03:00 AM
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I used to run 255/50/17 Fuzion ZRI's on all 4 corners.. had no complaints at all...


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post #13 of 38 (permalink) Old 08-15-2011, 09:37 PM
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Quote:
Originally Posted by fast Ed View Post
But if they are 275/50/17, they will be almost 28" diameter ... stock diameter is 26.6". Pretty sure that is going to rub, especially if the car is lowered at all.


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Ed, they'll fit. That's what I run on the back of my XR7, which is lowered 1". It isn't a common size though, so you're limited to Nittos or Falkens.


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post #14 of 38 (permalink) Old 08-15-2011, 09:51 PM Thread Starter
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racecougar I like the exact amount you lowered your car. That's about how much I want showing between my wheel well and tire.
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post #15 of 38 (permalink) Old 08-15-2011, 09:59 PM
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Ed, they'll fit. That's what I run on the back of my XR7, which is lowered 1". It isn't a common size though, so you're limited to Nittos or Falkens.
That's lowered an inch, really? I remember now that you had those big-azz tires on your Cougar, looks good. But I thought it was stock ride height, or maybe even raised a bit. Guess it's an illusion with the tall tires. Thanks for the correction in any case!


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post #16 of 38 (permalink) Old 08-15-2011, 10:21 PM
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Yep. It has the Vogtland springs from the original GP (1" drop). Eventually, I plan on cutting just a little bit off the front springs to get just a little more rake. The 275/50R17's work well for me since they're close to the same size as my slicks (28x11.50-16), so I don't have to change the shift and TC lockup points between the track and street each time.

And thanks!

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post #17 of 38 (permalink) Old 08-15-2011, 10:53 PM
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255/50/17's here. Nitto INVO's. No complaints, takes a bit to file down the control arm ball joint stud excess but it doesn't hurt them any.

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post #18 of 38 (permalink) Old 08-16-2011, 10:23 AM
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fordfreak300,

I'm running 285/40-17 on the back and 255/45-17 on the front, with 17"x9" wheels. The tires are Nitto 555s, which I believe run a little small for a given size, relative to other brands. I had to roll the rear fender lips and use a thin spacer in the front, but overall the fit is good. I like these particular tires because they offer good looks, decent traction dry and wet, and they are quiet.

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post #19 of 38 (permalink) Old 09-07-2011, 09:10 PM Thread Starter
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Thank you all for this information! I have my new wheels on my car. pic is in my thread in the newbie section. I have 275/40/17 tires all the way around right now. The car is at stock ride height at the moment and there are no clearance issues. I do need to get new tires soon so I will be looking at some of the choices you guys have suggested. My car is my daily driver so it has to be good in the rain on the rare occasions it rains here.
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post #20 of 38 (permalink) Old 12-19-2011, 12:29 PM Thread Starter
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I'm going to finally be getting new tires in January and I am back to this thread. I reread all of the suggestions. I am going to stick with the 275/40/17 on the rear or maybe a 285/40/17. I want something a little skinnier on the front though. I was thinking of the 245/45/17 but I'm not sure how they will fit on a 9" wide wheel. I do not want the tires to look stretched on the wheel at all. I want the same height as I have now, just skinnier and not to be stretched on the wheels. Any ideas on the fronts?

Just to update anyone who has not read my thread in the newbie section. I have lowered my car a hair using some sport sport springs i got. I cut enough off the front to lower it about an inch and the rear I only lowered about 3/4"

Thank you again for all of your help.

Mark

Also for anyone reading this, my 275s on the front follow every groove in the road. Very annoying on my daily driver.

DOH! I over looked the very first post when rereading this somehow. I guess my real question has now become what is the height difference between a 275/40/17 and a 285/40/17.

Quote:
Originally Posted by fast Ed View Post
It can be a bit tough to get a tall enough tire in 17" to suit an MN-12. 245/50R17 is a very close match to the diameter of the original tires. Going with 9" wheels limits the choices a bit too. If you want staggered sizes front and rear, maybe 255/45R17 and 285/40R17, which will be about 1/2" shorter than originals.


cheers
Ed N.

Last edited by fordfreak300; 12-19-2011 at 12:40 PM.
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post #21 of 38 (permalink) Old 12-19-2011, 12:58 PM
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255/45s on all fours here. No rubbing or other issues. 9" rim.

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post #22 of 38 (permalink) Old 12-19-2011, 01:41 PM Thread Starter
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I am going to go with the 255/45 on the front, as for the rear I haven't decided on 275 or 285 yet as I don't know the tire height differences.
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post #23 of 38 (permalink) Old 12-19-2011, 01:46 PM
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I wrote a tire dimensions calculator, available here: http://alhscds.dyndns.org/raw/tirecalc.html

Eventually I'm going to try to get it added to the tech articles here for quick and easy access.

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post #24 of 38 (permalink) Old 12-19-2011, 01:48 PM Thread Starter
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I found this tire height chart http://www.wheelcityusa.com/tires/chart.htm seems the 285 is the closest in height to the 255 fronts. I wonder if 245/45/17s would be stretched on a 9" wheel. If they would not be, then they would actually match my 275s pretty good. I really only need to replace two of my tires, but was going to do 4 to keep the tire heights the same and have some skinnier tires on front. I guess i need to do more searching and see what i can come up with.
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post #25 of 38 (permalink) Old 12-19-2011, 01:52 PM
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That is why I paired up those two sizes for my street tires.

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post #26 of 38 (permalink) Old 12-19-2011, 01:54 PM Thread Starter
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Quote:
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That is why I paired up those two sizes for my street tires.
Mike do you have any pics of them on your car anywhere i can see?
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post #27 of 38 (permalink) Old 12-19-2011, 02:16 PM
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There are some views here.

http://www.cardomain.com/usernew/gal...d=2669454&up=1

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post #28 of 38 (permalink) Old 12-19-2011, 02:30 PM Thread Starter
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It just stakes me to a log in screen.
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post #29 of 38 (permalink) Old 12-19-2011, 02:40 PM
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post #30 of 38 (permalink) Old 12-19-2011, 02:48 PM Thread Starter
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yes those pics worked perfect. Thank you very much! and I like how the tire sizes look.

Looks like my decision will be 255/45/17 front and 285/40/17 rear. Thank you for the help. It is very funny I am ending up with what Ed suggested in the very first post of this thread.

Looks like the fronts will be an inch narrower on each side. that will help with the car tram lining on the roads.

Last edited by fordfreak300; 12-19-2011 at 02:57 PM.
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