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mike m
Dodge Dakota
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1/07/2005
12:34:16
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 Subject: tire nomenclature question
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I just bought a 2001 Dakota SLT 4x4 V6 3.9L with 20k miles and Goodyear Wrangler RT/ P265 70R16 111S tires on rims that have the ram symbol. Would these be the stock wheels? What do the numbers mean and what would be the biggest tires I could fit on these rims? Also what pressure would be best for normal paved street riding? I’m getting around 16-18 mpg city and 20-22 highway.Thanks everyone.
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furball69
Dodge Dakota
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1/07/2005
14:57:05
|  RE: tire nomenclature question
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RT/ P265 70R16
RT = Rugged Terrain
P = Passenger vehicle
265 = sidewall width at the widest point in mm
70 = sidewall height in percentage of sidewall width.
R = Radial
16 = wheel diameter.
"Would these be the stock wheels?"
Possibly, likely, who knows. 16" wheels are pretty common as stock equipment.
" What do the numbers mean and what would be the biggest tires I could fit on these rims? "
Shouldn't be a problem running 44's on them.
" Also what pressure would be best for normal paved street riding? I’m getting around 16-18 mpg city and 20-22 highway.Thanks everyone."
Whatever is says on the sidewall. Probably 30-35#.
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mike m
Dodge Dakota
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1/07/2005
15:47:51
| RE: tire nomenclature question
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thanks furball69.
44's? 44 would be replacing what part of the model #?
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BigEd
Dodge Dakota
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1/07/2005
16:13:17
| RE: tire nomenclature question
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The Goodyear Wrangler RT/S tires show a max PSI of 44.
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JD
Dodge Dakota
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1/07/2005
17:24:52
| RE: tire nomenclature question
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Mike.
265/70R16 is roughly equivalent to 31x10.5x16. 31" diameter x 10.5" width x 16" rim.
'44' would replace the '31' in the tire size number. 44" diameter tire.
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headache
Dodge Dakota
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1/07/2005
17:41:21
| RE: tire nomenclature question
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what`s nomenclature?
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Jag
Dodge Dakota
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1/07/2005
17:52:48
| RE: tire nomenclature question
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what are tires???
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JD
Dodge Dakota
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1/07/2005
20:54:53
| RE: tire nomenclature question
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Hey. Cut it out.
Mike M just doesn't know that a good tire/wheel place will be able to give him the answers.
So Sh-h-h-h. Humor him a bit longer.
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Elliot Naess
Dodge Dakota
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1/07/2005
21:34:28
| RE: tire nomenclature question
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Mike M: Do not run the pressure that is marked on the sidewall. That is the maximum that the tire can stand without risking damage, but it is usually too much for normal driving.
With the stock tires, run the pressure that Dodge recommends in the owners manual or on the door sticker. With oversize tires, consult the store you buy them from.
Think carefully about why you want oversize tires. I'm not telling you not to buy any such, but please think it thru first.
And keep ansking questions. Then sort thru the answers carefully and keep learning. Good luck!
Elliot
1998 CC 2wd
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mike m
Dodge Dakota
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1/07/2005
22:39:43
| RE: tire nomenclature question
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jag and headache have been confusing the little yellow school bus with the hydraulic lift that helps them in the door they ride on for a dodge dakota with a lift kit :)
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Elliot Naess
Dodge Dakota
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1/08/2005
00:23:09
| RE: tire nomenclature question
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Mike M.: Possibly, but it is not nice to stare ;-)
Did you make sense of what I said?
Elliot
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hmmm
Dodge Dakota
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1/08/2005
07:56:06
| RE: tire nomenclature question
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Isn't he first # the tread width ? Won't sidewall width vary depending on rim width and inflation pressure ?
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Jag
Dodge Dakota
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1/08/2005
08:08:36
| RE: tire nomenclature question
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hmm: yea, you are right. I thought of mentioning that but decided to pass. The first number is maximum tread with in MM, not sidewall.
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Elliot Naess
Dodge Dakota
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1/08/2005
12:47:04
| RE: tire nomenclature question
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As I remember it (and I'm old and sometimes confused), "265" (in this case) is across the sidewalls, as Furball says. This is based on some theoretical ideal rim width, and actual measurement will of course vary with the rim it is installed on, yes.
A good rule of thumb for tire/rim fitment, is that the rim width should be the same as the tread width. That leaves the sidewall bulge nice and even.
Elliot
1998 5,2 CC 2wd
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caulk04
Dodge Dakota
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1/08/2005
16:21:58
| RE: tire nomenclature question
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P265/70-R16 is mathematically 30.6" tall.
First letter(s) (P in this case) means passenger, or standard load. Can also be LT for light truck which has different load ratings (c, d, e...).
First number (265) is section width, overall width at widest point.
Second number (70) is the ratio of sidewall to section width (first number).
Thrid number (16) is rim size in inches.
Increasing or decreasing any of the three numbers will, respectively, increase or decrease your overall height.
To calculate your height, multiply your section width by your sidewall (265x.70=185.5) for the height of one sidewall. Multiply this by 2 (185.5x2=371) for the height of both sidewalls in mm. Divide this number by 25.4 (371/25.4=14.6) for that number in inches. Now add your rim size (14.6=16=30.6) for your overall height.
Remember, your actual height will vary a bit by tire manufacturer.
I have LT265/75-16 Cooper Discoverer ATR's on my '02 4x4 and they fill the wells nicely but they would rub some if you have the wheels turned and flex pretty good.
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