since im retarded to this subject... i need to know what size my tiny dinky 265's are in inches so i can program the computer with my shiney brand new hypertech box of love

thanks guys!

 

the 265 is width. not height. so usually 265 can be anything between 29 inches (my old 265s where 29 inches) but when i was shoppin around for tires, i saw 265s that where up to 31 inches. the easiest way to find out the real measurement in inches is just to use a tape measure and find out yourself.

 

Try this site http://www.miata.net/garage/tirecalc.html If it works you should be able to figure it out.

 

265 by what (75, 85) but there around a 31

here this was posted a while back its how to figure it out just fill in for what you have




The first number you know is the width in mm (265)

the second number is an aspect ratio for how tall the side wall is (75)

In this case 75% of the tread width (works out to 265 * .75 = 198.75)

That is the sidewall height, so multiply it by 2 (397.5)

Everyone likes inches better (397.5 / 25.4 = 15.65")

Add that to the wheel diameter (15.65 + 16 = 31.65) for a 16 in rim

That's the tire outside diameter when new, it's also assuming the tire is perfectly round, hard to measure with a measuring tape due to loading when on the vehicle.

 

how does that work? truck came stock with 275 and they werent anywhere near 30's were they i dont have a clue how that conversion works

265/r17/75 i think is what they are

 

Specification Sidewall Radius Diameter Circumference Revs/Mile Difference
265/75-17 7.8in 16.3in 32.6in 102.6in 618 0.0%



ill be damned...

 

see my edit lol any questions pm me

 

ahhhhh yes i see... makes sense now...thanks ryan

 

thats why were all here lol

 

In some cases the tire manufacture will have the tire specs on their web site. I know BFG and Nitto do...

Example
http://www.bfgoodrichtires.com/asset...rain_ta_kd.pdf