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  #11065  
Old 04-04-2016, 08:53 PM
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Re: What did you do to your WK today?

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Originally Posted by Rkirk View Post
255/75's BFG KM's from a Rubi.
Ah im having trouble finding the correct size foe my 265/70/17 nittos

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  #11066  
Old 04-04-2016, 08:55 PM
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Re: What did you do to your WK today?

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Originally Posted by Alex47er View Post
Ah im having trouble finding the correct size foe my 265/70/17 nittos

Correct size what?
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  #11067  
Old 04-04-2016, 08:58 PM
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Re: What did you do to your WK today?

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Originally Posted by Rkirk View Post
Correct size what?
Sorry correct size for my 265/70/17 in inches for my nittos I read online 31.65 but cant find that on my hypertech.
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  #11068  
Old 04-04-2016, 09:06 PM
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Re: What did you do to your WK today?

Quote:
Originally Posted by Alex47er View Post
Sorry correct size for my 265/70/17 in inches for my nittos I read online 31.65 but cant find that on my hypertech.

It goes by .25" increments so you'll just wanna set it at 31.50 or 31.75. You also shouldn't go off of advertised diameter, there's tolerances in place that allow for 1/2" or more sometimes in tire manufacturing, to be as accurate as possible just lay a straight edge on top of your tread, perpendicular to the sidewall that extends out a bit, and measure from the ground to your straight edge. That'll give you your closest actual diameter, factoring in load and inflation pressure. Spec sheets are close but every application is different.
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  #11069  
Old 04-04-2016, 09:19 PM
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What did you do to your WK today?

Quote:
Originally Posted by Alex47er View Post
Sorry correct size for my 265/70/17 in inches for my nittos I read online 31.65 but cant find that on my hypertech.

Furthermore, you can always determine your tire size in inches the old school way, with an equation and good ol' math. Haha!! The metric sizing that most tires are labeled now can be broken down into inches pretty easily. For example: 265/70/17
265mm section (tread) width
70 is your aspect ratio, which is just the percentage of the width determining your sidewall height
17 is obviously your wheel diameter

265/25.4= 10.43 width in inches
10.43•.75=7.82 sidewall in inches
So, 7.82+7.82 (2 sidewalls in total)= 15.65 (round up from 15.649)
15.65+17(wheel diameter)=32.65
All that math tells you that your tires "should" be 32.65" tall and 10.43" wide. Just remember tolerances and wheel specs and load all factor into actual ride height so measure them and see where it's actually sitting.
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  #11070  
Old 04-04-2016, 09:23 PM
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Re: What did you do to your WK today?

Quote:
Originally Posted by Rkirk View Post
Furthermore, you can always determine your tire size in inches the old school way, with an equation and good ol' math. Haha!! The metric sizing that most tires are labeled now can be broken down into inches pretty easily. For example: 265/70/17
265mm section (tread) width
70 is your aspect ratio, which is just the percentage of the width determining your sidewall height
17 is obviously your wheel diameter

265/25.4= 10.43 width in inches
10.43•.75=7.82 sidewall in inches
So, 7.82+7.82 (2 sidewalls in total)= 15.65 (round up from 15.649)
15.65+17(wheel diameter)=32.65
All that math tells you that your tires "should" be 32.65" tall and 10.43" wide. Just remember tolerances and wheel specs and load all factor into actual ride height so measure them and see where it's actually sitting.
What would be better higher or lower?
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  #11071  
Old 04-04-2016, 10:22 PM
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Re: What did you do to your WK today?

Im going to try 31.75
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  #11072  
Old 04-04-2016, 10:33 PM
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Re: What did you do to your WK today?

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Originally Posted by Alex47er View Post
What would be better higher or lower?

The difference will be negligible, we're talking 1/10" either way. Once you measure your true diameter just go with the closest increment. Should be good to go.
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  #11073  
Old 04-04-2016, 10:35 PM
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Re: What did you do to your WK today?

Quote:
Originally Posted by Rkirk View Post
The difference will be negligible, we're talking 1/10" either way. Once you measure your true diameter just go with the closest increment. Should be good to go.
Ill check it out tomorrow shes running good kind of sluggish with 31.50 so I might go with 31.75 till I measure
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  #11074  
Old 04-04-2016, 11:56 PM
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Re: What did you do to your WK today?

Quote:
Originally Posted by Alex47er View Post
Ill check it out tomorrow shes running good kind of sluggish with 31.50 so I might go with 31.75 till I measure

Bro all that changes is your speedometer calibration. If you set it smaller you'll be going faster than the speedo says. I'd set it bigger so that way you think your going faster than you are, hence less chance of a speeding ticket 😆 with those tires set it to 31.75


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  #11075  
Old 04-05-2016, 12:02 AM
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Re: What did you do to your WK today?

Quote:
Originally Posted by greenwayer View Post
Bro all that changes is your speedometer calibration. If you set it smaller you'll be going faster than the speedo says. I'd set it bigger so that way you think your going faster than you are, hence less chance of a speeding ticket 😆 with those tires set it to 31.75


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  #11076  
Old 04-05-2016, 12:06 AM
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What did you do to your WK today?

Quote:
Originally Posted by Rkirk View Post
Furthermore, you can always determine your tire size in inches the old school way, with an equation and good ol' math. Haha!! The metric sizing that most tires are labeled now can be broken down into inches pretty easily. For example: 265/70/17
265mm section (tread) width
70 is your aspect ratio, which is just the percentage of the width determining your sidewall height
17 is obviously your wheel diameter

265/25.4= 10.43 width in inches
10.43•.75=7.82 sidewall in inches
So, 7.82+7.82 (2 sidewalls in total)= 15.65 (round up from 15.649)
15.65+17(wheel diameter)=32.65
All that math tells you that your tires "should" be 32.65" tall and 10.43" wide. Just remember tolerances and wheel specs and load all factor into actual ride height so measure them and see where it's actually sitting.

Something seems wrong here. Looks like you meant 10.43 *.70 since the aspect ratio is 70 not 75. It should come out to 31.6 not 32.6


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