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tyre size.... measured and sidewall

General Tech Talk

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Posts: 2910
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tyre size.... measured and sidewall

Post by -Mick- »

I reckon it'd be a good idea to post a list of tyre sizes, comparing what they actually measure to what they're meant to be. Some of the variations are just stoopid and its good info if you're looking to buy :cool: I need to go larger now to save my gearing :roll:

Best idea is to use a template... just cut and paste it for each tyre type :D I'll start......... maybe this could get stickified :?:

BRAND : Pro Comp

MODEL : X-Terrain

STATED SIZE : 31"

MEASURED SIZE : 30"

RIM WIDTH : 7"

PSI : 32

good ideas slunnie :lol:
Last edited by -Mick- on Sun Apr 17, 2005 6:52 pm, edited 2 times in total.
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Post by mickyd555 »

last time i was looking for tyres, they had a chart that gave actual measured size of the tyre im mm, that way you can see the difference in size by mm. very acurate, but i dont knwo when they measure it, ie, on rim or off........


just an idea
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Post by Thor »

also say whether they are on/off rim.etc :?:
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Post by Slunnie »

measuring rim would also be good to gauge width and also measured pressure which all make a difference.

BRAND : Simex

MODEL : JT2

STATED SIZE : 34x11.5-16

MEASURED SIZE : 35.2 x 11.8

RIM: 8"

PSI: 36
Cheers
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Post by landy_man »

and what about whether it is on the vehicle or not...
and perhaps on what vehicle...
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Post by Slunnie »

I thought tyres sizes were measured off the vehicle.
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Slunnie

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msh
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Post by msh »

I made up a list a while back for that exact reason, got about 15 different companies, only did 31's 32's and 33's. I dont know how to post it so it is readable though, i did it in excel, if youv'e got any ideas let me know and I'll try to put her up. I only used the companies claimed overall diameter though.
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Post by -Mick- »

msh wrote:I made up a list a while back for that exact reason, got about 15 different companies, only did 31's 32's and 33's. I dont know how to post it so it is readable though, i did it in excel, if youv'e got any ideas let me know and I'll try to put her up. I only used the companies claimed overall diameter though.


send it to me :idea: email button at bottom of my sig :)
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Post by -Mick- »

thanks to msh for this info :D

Image
Last edited by -Mick- on Tue Apr 19, 2005 10:02 pm, edited 3 times in total.
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Post by M1S3RY »

Measured off car, going by results, looks like most 31s are measured to 30 inches..

BRAND : Bridgestone

MODEL : Desert Dueller (604V)

STATED SIZE : 31x10.5r15

MEASURED SIZE : 30 x 10.5

RIM: 7"

PSI: 40
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Post by msh »

I think most makers measure diagonally or horizontally, that way they can say measured on vehicle is same as off.
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Post by Zute »

Just a thought, eg, if a 31" is measured at about 30" and it seams that most are. Than maybe they ( the manufactorer) may mean 31" is the size the tyre will expand to at speed... That would give you a max clearance.
As I said, just my own thoughts, but it would explain the differance.
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Post by ISUZUROVER »

BRAND : Goodyear

MODEL : MTR

STATED SIZE : 285/75-16

MEASURED SIZE : 33.2"

RIM WIDTH : 7"

PSI : 35
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