Ive been looking forever to find a site that has a tire chart that converts the differnt tire sizes

315/70/17??

33X12.50.17???

Any help?

 

315's are a little closer to 35's if I'm not mistaken? Maybe someone more knowin will chime in too.

 

315 is a 35'in tire, so it would be a 35x12.50R17LT

 

Not really sure what you are asking for, but here is a tire comparison calculator and the BFG All Terrain T/A specification chart.

http://www.1010tires.com/TireSizeCalculator.asp

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

 

http://www.1010tires.com/TireSizeCalculator.asp

 

a 315 is not necessarily a 33" or a 35", it just tells you how wide the tire is. when someone says the have a 315/70/17, that tells you that the tire is 315 wide, the sidewall is 70% as tall as the tire is wide and the 17 is the rim size. so if you had a 315/50/17, it wouldnt be as tall as a 315/70/17. with that being said i believe the tire you are talking about is a 33".

 

a 315 is about 1/8" smaller diameter than a 35. Most 35's are 34.6-34.9" i believe a 315 is about 34.4-34.5"

 

www.tyres1.com

 

This one will figure tire sizes, gear ratios, and crawl ratio.

CLICK HERE

 

well a 315/70-17 is 34.4 short story long the tire is 315MM wide. the sideall is 70% of that. your wheel is 17. so 315 x .70 x 2 +17= tire diameter

33" is 33"

just use the coverters above.

 

The "metric" tire measurement works like this:
first number is the tire width in mm: divide by 25.4 do get width in inches
The second number is the aspect ratio (the % of the width that is the sidewal)l: so multiply the width (in inches) by the aspect ratio in decimal (ex .75). Now add the rim diameter and 2 times the (width*aspect ratio). and viola! The tires approximate dimensions in SAE units (inches).
Heres an example: 285/75r16:

285/25.4=11.22 inches
.75*11.22=8.4 inch sidewall
2*8.4+16=32.8" Tire diameter (varies slightly by wheel width ect. but gives you a good idea