84-85 Trucks & 4Runners 2nd gen pickups and 1st gen 4Runners with solid front axles

tire size question

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Old Mar 5, 2008 | 05:33 PM
  #1  
ismoyota's Avatar
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From: mountains of south carolina
driving me craaaaaaaaaaazy

i tried to search this but i cant get a straight answer-

what metric (285/70R16) tire size is equivalent to a 33x12.50r15------

i got a set of steel wheels that are 16's and i would like to put them on my truck but i'm not familiar with this metric stuff.


anybody running such a tire????

Last edited by ismoyota; Mar 5, 2008 at 05:40 PM.
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Old Mar 5, 2008 | 05:51 PM
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From: UK and Gulf Shores, AL
Go to any manufacturer's website and you can see specifications for their tire sizes. For example, here are the specifications for BF Goodrich MT KM tires:

http://www.bfgoodrichtires.com/specs...a-km/1152.html

If my scribbled notes are correct, an LT305/70R16D will be fairly close to a 33x12.50 - 15. OD and width specifications are listed for both on the linked webpage.
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Old Mar 5, 2008 | 05:53 PM
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From: Auburn, Al
305/70R16

See my sig line.
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Old Mar 6, 2008 | 04:12 PM
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From: mountains of south carolina
thanks-- - - - - tires ordered
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Old Mar 6, 2008 | 08:37 PM
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For future reference, there are lots of on-line metric tire size calculators, like this one:
- http://www.4crawler.com/4x4/4LoCalc.shtml#MetricTire
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Old Mar 6, 2008 | 08:43 PM
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The first number is the width in mm. 25.4mm=1in

The second number is the ratio. If it says 65, then the sidewall height is 65% of the width.

33*12.5=12.5*25.4=317.5mm

(33-15)/2=9

The sidewall is 9" tall.

9/12.5=72%

Therefore 317.5/72R15 is THE closest you can get.
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