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stx
Dodge Dakota
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7/27/2007
16:37:54
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 Subject: which is the wider tire???
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Message:
265/70/16 or 255/65/16
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Gears
Dodge Dakota
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7/27/2007
20:14:43
| RE: which is the wider tire???
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The first number in a tire size is the width in MM's. The second number is the percentage of the width that is the height. The R means it's a radial tire. The 16 is the rim size it fits.
That said, a 265 is 10mm wider than a 255.
Lets see I hope I remember this right.....
265mm (is 10.4 inches wide)/ 70% (185.5 x2=371)(371mm=14.55in.)/ 16 (16 +14.55)=30.55in. tall
.........Gears
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Forseti
Dodge Dakota
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7/27/2007
20:26:07
| RE: which is the wider tire???
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255/65/16
Sidewall 6.5 In
Radius 14.5 In
Diameter 29.1 In
Circumference 91.3 In
Revs/Mile 694.0
265/70/16
Sidewall 7.3 In
Radius 15.3 In
Diameter 30.6 In
Circumference 96.2 In
Revs/Mile 659.0 In
With the bigger tire when your speedo read 60 MPH your actually going 63.2
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stx
Dodge Dakota
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7/27/2007
21:19:15
| RE: which is the wider tire???
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i apreciate both of your answers.. thats what i was thinking that the 265 was wider but a bunch of other guys on here said that the 255/70/16 was a wider tire??? i thought that the 65 or 70 or whatever numer meant a certain percentage of the width was the heigth. just makin sure i wasn't losing my mind.
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Gears
Dodge Dakota
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7/28/2007
22:07:33
| RE: which is the wider tire???
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You might be losing your mind, but not from this .............LOL
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Curly
Dodge Dakota
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7/29/2007
10:21:16
| RE: which is the wider tire???
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the first number is the tire height
the second {2 digit number is the width}
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Kowalski
GenIII
7/29/2007
14:10:36
|  RE: which is the wider tire???
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No, the first # is the width, as the others have already explained. The second # is the aspect ratio - the relationship between width and height - not the width itself as Curly claims.
Lead, follow, or get out of the way
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Curly
Dodge Dakota
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7/29/2007
18:09:55
| RE: which is the wider tire???
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Let's take a look at the most common designation, the metric system for tires. This is the one that reads 120/80V-16. This type of designation is the most commonly used nowadays, and would break down as follows:
120 is the nominal width of the tire, in millimeters.
80 is the aspect ratio, expressed as a percentage of the width.
V is the speed rating for the tire.
16 is the diameter of the wheel that the tire is constructed for.
80 is the aspect ratio, "expressed as a percentage of the width"
put a 40 series and a 70's series tire side by side and tell me which is wider!
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Forseti
Dodge Dakota
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7/29/2007
22:28:34
| RE: which is the wider tire???
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Set a 40 series and a 70 side by side and they will be the same width ,,,,,,,,,
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stx
Dodge Dakota
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7/30/2007
10:16:24
| RE: which is the wider tire???
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now yall just confused me.
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daddio
Dodge Dakota
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7/30/2007
10:46:17
| RE: which is the wider tire???
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stx, maybe this site will help you understand.
http://www.kellytires.com/auto/tire_school/terminology.html
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Kowalski
GenIII
7/30/2007
17:41:10
| RE: which is the wider tire???
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Whether a 40 series or 70 series is wider will depend on the width of the tire itself - not just the profile. The aspect ratio just gives us the profile, you need the first # for the width.
Lead, follow, or get out of the way
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fotodak
Dodge Dakota
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8/02/2007
11:23:28
| RE: which is the wider tire???
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Message:
The first number is NOT the width of the tire. It is the height of the sidewall. Hence a 255/75-15 is taller than a 205/75-15. Same aspect ratio, but the 255 WILL be wider, because it is taller. 70% of 255 is more than 70% of 205.
If it was the width, then the 255 would only be wider, not taller.
Tire widths vary between tire models. Some 70 series tires are wider than 60 series. It depends on the overall size (diameter) of the tire.
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daddio
Dodge Dakota
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8/02/2007
12:54:02
| RE: which is the wider tire???
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i don't think so. you might want to check out the site i posted earlier.
http://www.kellytires.com/auto/tire_school/terminology.html
tire type= P, tire width= 235, aspect ratio= 75, construction= R, wheel diameter= 15 for
P235/75R15
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fotodak
Dodge Dakota
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8/02/2007
16:25:47
| RE: which is the wider tire???
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When the present system came into effect, they said then it was the sidewall height, and the tread width depended on the aspect ratio. Now I see they have changed that.
Here is what the first number designates-and it's not the TREAD width:
The 225 indicates this tire is 225 millimeters across from the widest point of its outer sidewall to the widest point of its inner sidewall when mounted and measured on a specified width wheel. This measurement is also referred to as the tire's section width. Because many people think of measurements in inches, the 225mm can be converted to inches by dividing the section width in millimeters by 25.4 (the number of millimeters per inch).
Widest point of the SIDEWALL on a SPECIFIC width wheel.
The sidewall width can be 255 while the TREAD WIDTH can vary from tire to tire. You could have a 255/60-15 with a tread width of one inch.
Leave it to our government to screw things up by changing a perfectly good system that worked.
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Kowalski
GenIII
8/02/2007
17:51:42
| RE: which is the wider tire???
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Message:
That's the way it has always been since the start of metric designation for tires. The government didn't change it. The first # has always been the width - take it from someone who has been around since most tires had letter designated widths. Your right about how it is measured (the section, not the tread) but you can't have a 255/60-15 with a tread width of one inch. That's just ridiculous !
Lead, follow, or get out of the way
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sxt
Dodge Dakota
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8/02/2007
21:28:55
| RE: which is the wider tire???
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Message:
ok so someone just tell me which one is wired please. I really don't care y or how I just want to know.lol
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KotaEthx
Dodge Dakota
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8/03/2007
00:03:18
| RE: which is the wider tire???
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The first number is the width. 265...is wider than 255...
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daddio
Dodge Dakota
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8/03/2007
09:53:22
| RE: which is the wider tire???
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sxt, did you even go to the site i posted earlier? read, educate yourself. you may be able to help someone else one day. don't wait to be spoon fed information.
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sxt
Dodge Dakota
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8/03/2007
10:08:09
| RE: which is the wider tire???
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my bad i completly missed your link. my bad.
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hollywood
Dodge Dakota
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8/12/2007
13:55:13
| RE: which is the wider tire???
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Message:
just set a 235/75R15 next to a 235/70R15 and the 70 will be a little shorter, but also about 1/2 to 3/4 wider than the 75, trust me, i worked in a tire shop for about 3 years. I believe that i would have some idea on this subject.
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