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moose0211 View Drop Down
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    Posted: 31-December-2009 at 4:28AM
Hello all, I am about to buy tires and wheels and i like Cragar s/s rims and those black tires with white letters. I would like the biggest tire that can fit in the back without it sitting too high and a good sized one in the front. I tried the tire thread but i don't understand the sizes. Any recommendations? thanks
Moose


Edited by moose0211 - 31-December-2009 at 4:29AM
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Eliteman76 Quote  Post ReplyReply Direct Link To This Post Posted: 31-December-2009 at 6:23AM
Moose...depending on how tall of a tire you want to go with, I know a few guys here are running a 275/60/15 out back, it's a bigger tire and fills the wheel well out nice.
I am a fan of 295/50/15 tires, but they are a bit shorter so if you have deep gearing,
255/60/15 tires on all 4 corners for a balanced look, but it is always sort of a preference of taste and honestly, budget.
 
The tire sizes are now pretty much based off the metric system:
example: 275/60R15
275 = width  {I think millimeters}
60 series {this is the side wall height, but I forget the way, if it's like 60% of the width or what}
R = rim
15 = rim diameter
 
There are other guys here that can chime in on this to better explain it.
 
Andy  
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Psquare75 Quote  Post ReplyReply Direct Link To This Post Posted: 31-December-2009 at 7:08AM
My new Cougar has 235 70 15s in front and 275 60 15s in back, on 15 x 8 s.
Paul
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Regul8r Quote  Post ReplyReply Direct Link To This Post Posted: 31-December-2009 at 11:10AM
yup Rear is 2 options in a 15inch rim...
Well 2 that are READILY available and cheap
 
295/50/15
275/60/15
 
mount the 295s on 8 or 10 inch rims
the 275 work on 7 or 8 inch rims
 
Those are the best options, 275 will fit INSIDE the wheel lip, 295 will stick out the wheel lip.
 
The 295 is shorter and with just a little lift no issues.
 
The 275 would be the best all around (rear) option that requires nothing but buying a 15x8 rim.
As for the fronts... some one else will have to chime in on that!
 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote moose0211 Quote  Post ReplyReply Direct Link To This Post Posted: 01-January-2010 at 6:16AM
Thank you Andy, I finally understand those sizes! I was looking at some pics and I like the 275s. Would a bigger tire affect take off times? Also, what does offset have to do with this?
Thanks
Moose
 


Edited by moose0211 - 01-January-2010 at 6:21AM
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Regul8r Quote  Post ReplyReply Direct Link To This Post Posted: 01-January-2010 at 9:45AM
The "R" does not mean rim it means Radial.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Psquare75 Quote  Post ReplyReply Direct Link To This Post Posted: 01-January-2010 at 12:15PM
a 295 will fit under the rear with proper backspacing.
Paul
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Eliteman76 Quote  Post ReplyReply Direct Link To This Post Posted: 01-January-2010 at 2:02PM
radial? Really, I always assumed it meant "rim".
lol, see what I am good for? 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote moose0211 Quote  Post ReplyReply Direct Link To This Post Posted: 01-January-2010 at 2:41PM
do you know what offset i would need to have 275s?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Psquare75 Quote  Post ReplyReply Direct Link To This Post Posted: 01-January-2010 at 2:47PM
I have a 9" wide cragar in back with a 4.5" backspacing.
Paul
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Post Options Post Options   Thanks (0) Thanks(0)   Quote picon3 Quote  Post ReplyReply Direct Link To This Post Posted: 01-January-2010 at 3:09PM
Originally posted by moose0211 moose0211 wrote:

do you know what offset i would need to have 275s?
 
Here's my setup.  I've had no problems at all. 
 
Magnum 500 15 x 8 wheel:
 
72 Ford Gran Torino Sport
 
Front Tire -P255/60/R15
Rear Tire - P275/60/R15
 
Front Rim -15x8 - (4.50" Backspacing)
Rear Rim - 15x8 - (4.50" Backspacing)-fills the rear wheel nicely.  No rubbing.
 
Center Bore Diameter 2.125 inch with press on caps.
 
Paul~
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Post Options Post Options   Thanks (0) Thanks(0)   Quote moose0211 Quote  Post ReplyReply Direct Link To This Post Posted: 03-January-2010 at 8:07AM
Okay, with somr reasearch and help from UANTE and picon3's posts, I have decided on
 
Cragar s/s rims
 
Front- 15x8s  P255/60/R15 tire
 
Rear- 15x10s P295/50/R15 tire
 
DO you think this is a good set up? and what offsets would be best?
 
Also, whats the bolt pattern?


Edited by moose0211 - 03-January-2010 at 11:56AM
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Regul8r Quote  Post ReplyReply Direct Link To This Post Posted: 03-January-2010 at 12:53PM

On my Dakota I run stock 15x8 rims

rear 295/50
front 265/50
 
it is a GREAT set up,
I am doing the same sizes on the Torino, except rear rims are gonna be 15x10 and I think fron tis gonna be 15x7. thats what I have in slot mags at the house.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Classicfitness Quote  Post ReplyReply Direct Link To This Post Posted: 03-January-2010 at 1:55PM
BF Goodrich Radial T/A 215/70R14 on the four corners of my GTS.
I find it a nice fit Approve




Edited by Classicfitness - 03-January-2010 at 4:11PM
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 73GTS Quote  Post ReplyReply Direct Link To This Post Posted: 03-January-2010 at 2:46PM
Maybe some pics of the different sizes installed would be more helpful. 

I know I'm confused about deciphering  the sizes anymore. P275/60R15 used to mean height/width/(radial)/rim size. A P295/50R15 tire is actually shorter than the P275/60R15. I was told it has to do with the width. 40's, 50's, 60's. If you want a taller tire than the P275/60R15 you need something like a P295/60R15. This size (60) would be taller, but in a 50 series the P295 is actually shorter than the P275/60R15. Compared to the P275/50R15, the P295/50R15 is taller.Wacko
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Regul8r Quote  Post ReplyReply Direct Link To This Post Posted: 03-January-2010 at 3:24PM
ok here's the deal...
P275/60R15 means height/"SERIES" or width/radial/rim size.
YES A P295/50R15 tire is actually shorter than the P275/60R15
 
275 (275MM or 27.5CM) equals 10-13/16" just over 10.75 inches WIDE
295 (295MM or 29.5CM) equals 11-9/16" just over 11.5 inches WIDE
 
NOW for the Series/Width explanation
This is the height of the sidewall...
70 series, the sidewall measurement is 70% of WHATEVER the width number is
60 series, the sidewall measurement is 60% of WHATEVER the width number is
50 series, the sidewall measurement is 50% of WHATEVER the width number is
ETC...
 
SO...
a 275/60 is 10.75WIDE(approx) times 60% = 165MM Sidewall height (16.5CM or 6.5 inches)
a 295/50 is 11.5 WIDE(approx) times 50% = 147.5MM Sidewall height (14.75CM or 5.75 inches)
 
now to see how the 275/60 is TALLER than the 295/50...
rim is 15 inches across plus 2 times the sidewall...
275/60    is 6.5" x 2= 13" + 15"    = 28 inches tall or DIAMETER (APPROX)
295/50    is 5.75" x 2= 11.5" + 15 = 26.5 inches tall or DIAMETER (APPROX)
 
have to look at the manufacturer of the tire also!
Different tires have different characteristics and treads!
put two different 295s next to each other and you can see the difference!
Also put them side by side and they will be different heights as well.
 
this is also true if you put a 275/60 next to a 295/50, will be obviously different in heights some bigger than others.
 
OH, WAIT!!
I almost forgot!
RIM WIDTH... THAT will greatly affect the size of the tire too!
a 15x10 rim with a 295/50 will make the tire sit wider and shorter than the same tire will be on a 15x8 rim. As the tire will spread out to rim and not bulge out on the sidewalls and raise up.
 
Hope that all helps...
I will get pics later,
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Regul8r Quote  Post ReplyReply Direct Link To This Post Posted: 03-January-2010 at 3:50PM
275/60/15 on the car
 
295/50/15 set in place, and yes that is the aircleaner cover in place of the rim, but the tire is centered on the axle to show how it would sit.
Here is a 285/35/20 mounted for fun (YUCK)
 
Here are pics of the front's on it now 225/70/14
 
this is a full shot of it with the 275/60/15 rear and 225/70/14 front it has air shocks... without them blown up the car sits WAY down on the rear putting the tire up in the wheel well about 2 inches.
 
Here is what it looked like the day I got her home, the fronts were something stupid like 205/50 or 60 14's and the rears were SMALL 15's
 
here is the 275/60 from the rear ALSO you can see on my Dakota the 295/50/15s on the rear mounted on 15x8 rims(see the bulge in the sidewall)
 
here is the 295/50 from the rear
 
And 2 more shots of the 275/60s (the truck has it's itty bitty snow tires on it in this pic)
 
 
 
 
I will have COMPARISON pics as soon as the snow clears!
I have the 295/50/15's mounted on the 15x10 rims waiting to go on!
then I'll unmount these 275/60 and mount some 265/50 on those rims to put on the front or close to that size (255/60 maybe)
 
Hope any of this helps!?
 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Regul8r Quote  Post ReplyReply Direct Link To This Post Posted: 03-January-2010 at 4:24PM
New pics of the 295/50 mounted on the 15x10 rim
 
 
 
 
 


Edited by cowboyupdjcarl - 03-January-2010 at 4:25PM
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Psquare75 Quote  Post ReplyReply Direct Link To This Post Posted: 04-January-2010 at 3:08AM
http://www.miata.net/garage/tirecalc.html
Use this. It visually shows you the difference in tire size.
 
 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 73GTS Quote  Post ReplyReply Direct Link To This Post Posted: 04-January-2010 at 3:55AM
Can anyone please explain in simple terms what this means? I plugged in a stock tire with 4:30 rear gears (my size) and a bigger tire to see what effect it has on the rear ratio. I would think the 2 tires would need to have the same circumference to retain the same rear ratio.
 
 <<The circumference of the P215/75 x 15 original tire is 87.0121 inches

The circumference of the P335/55 x 15 aftermarket tire is 92.7016 inches

Your speedometer reading is 93.8% of your true speed.

The ratio of your old vs. new tires is 0.93.

The current differential ratio is: 4:30
To retain the same overall gear ratio, you will need a differential with a 4.30 ratio>>
Jim


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Post Options Post Options   Thanks (0) Thanks(0)   Quote Psquare75 Quote  Post ReplyReply Direct Link To This Post Posted: 04-January-2010 at 4:33AM
You are correct., same circumference = same ratio.

The calculator you used doesnt sound right.. You should need a slightly lower (numerically) gear to keep the 4.30 ratio. I'd try another.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote moose0211 Quote  Post ReplyReply Direct Link To This Post Posted: 26-January-2010 at 11:57AM
cowboyupdjcarl, did you ever mount those 295s on your car, if you did can you please post some pics i would like to see how they look. thanks
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Regul8r Quote  Post ReplyReply Direct Link To This Post Posted: 26-January-2010 at 2:58PM
I was going to do it this past weekend but ran out of time.
 
Need to pump up the tires and air shocks before I do it.
COLD spell running through here again!
 
Going away for the weekend as well so will not get to it til next weekend.
 
CANNOT WAIT for summer and the long sunny warm days!
 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote moose0211 Quote  Post ReplyReply Direct Link To This Post Posted: 06-February-2010 at 1:03PM
Okay, so I was looking a Mickey T tires and i saw that thee recomended rim size for a 275/60/15 was like 15x8 to 15x9.5. I wanted them on 15x10s because because I saw them on UANTEs thread. So my question is, can I mount them on a 15x10 with no problem?
Thanks
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 302ford Quote  Post ReplyReply Direct Link To This Post Posted: 06-February-2010 at 7:39PM
You could but it may look at bit off. 295's on a 10" have no buldge, so 275's are guna be straight up and down or leaning in slightly.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote moose0211 Quote  Post ReplyReply Direct Link To This Post Posted: 07-February-2010 at 5:16AM

Okay, what tire could I get that is as wide as the 295 but is a little higher?

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Post Options Post Options   Thanks (0) Thanks(0)   Quote Regul8r Quote  Post ReplyReply Direct Link To This Post Posted: 07-February-2010 at 7:54AM
nothing out there until you go into a Drag/Street Radial OR you go to a Mickey Thompson Sportsman.
 
There are ONLY two options for LARGE size at the 15 inch rim size (that I've found).
295/50-15 Short and Fat
275/60-15 Taller and no so Fat
Depends on exactly what you want.
for a 10 inch rim... 295 fits best.
 
Of course there are 265, 255, 245, 235 in all different aspect ratios.
 


Edited by cowboyupdjcarl - 07-February-2010 at 8:00AM
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Eliteman76 Quote  Post ReplyReply Direct Link To This Post Posted: 07-February-2010 at 9:16AM
You could go to a 295/60/15, in theory should fit fine, but I have not been able to pick up a set to test with the 15x10 rims I have.
Speaking of which, anyone that is looking for a pair of Chrome 15x10 wheels, I have a pair, and you can pick up matching wheels pretty cheap...

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Post Options Post Options   Thanks (0) Thanks(0)   Quote Regul8r Quote  Post ReplyReply Direct Link To This Post Posted: 07-February-2010 at 9:44AM
Andy,
There are NO/ZERO/NADA 295/60/15s ANYWHERE!
 
IF I could find them in a street radial, not some drag slick then I would DEFINATELY have them!
I am sure many others would too!!
 
for me a 295/60 would be the holy grail, all mighty, blue moon, end all beat all... but alas... it doesn't exist.
 
NOW, I PRAY SOMEONE CORRECTS ME ON THIS!!!
 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Eliteman76 Quote  Post ReplyReply Direct Link To This Post Posted: 07-February-2010 at 12:05PM
Sorry, yes, I know, only drag radials.
They have tread, so you *could* run them on the street...LOL
 
Honestly, I wish I could get a 295/50/16 but I have been told BFG killed that size.
Tire rack has a couple however...but no way am I going to pooch a couple onto 16x7 rims...
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