going bigger, but metric sizing??

ok i finished my BB lift witch consited of 3in blocks in the rear and a 1.75
poly space in the front. sense the back was saging about an inch the lift
looks quite good...

now im looking for bigger meats i figured 31x10.50 would be good sense its
just my 2wd daily driver so flexing and rubing wouldnt be a concern. right??

heres my quick question whats the metric conversion for that size sense i got
16in wheels...??

is there some web site that offers a conversion calculator...??

thanks in advance and cant wait to see how it looks with the bigger tires.

cas...

Metric tyre sizes are done this way:

225/75R-16 -
"225" is the tread surface width in millimeters.
"75" is the "aspect ratio" - the height of the sidewall as a percentage of the tread width
"16" is the wheel diameter (can be 12-32" by now...)

So, figure (quickly) what the sidewall height is, double it, and add it to the wheel diameter for tyre diameter.

Can't tell you what it will come out to to get your 31" figure, but you should be able to figure out a few sizes which will work - or confirm what the tyre shop sez.

5-90

265/75R/15 is the same as 31x10,5x15

Since you are using a 16" wheel you have to reduce the 75R part a few notches....