What is the next size up from 265/75/15? I am looking for other options around the 31x10.5x15 and the above is 30.5".

 

I don't know what's available, but increase the 75 for the same width but taller (ie 265/80/15)

or increase the first for wider and taller (ie 275/75/15)

search diffenent manufacturers to see what they have for sizes.

 

The closest thing to a 31 you will get in metric is either a 285/70/15 or 275/75/15.

285/70/15 = 30.7x11.2/15
275/75/15 = 31.2x10.8/15

Check into this size or what Jammy wrote above.

And if you need a conversion to check how close a metric size is to a 31, use this calculator.

This calculator

 

Who makes 275/75/15s? I can only find 265/75/15.

 

Edit: 1 sec.

Okay, after doing some research, the 275/75 is made for a 17 inch tire. Don't come in 15 inch.

I'd go with the 285s, but that's just me.

But why not go with the 265's? Or 31s?

No 31 is exactly 31 inches. They are either a tad taller or tad shorter. Mine are a little shorter than 31s yet they are 31-10.50-15s.

 

I just wanted to see my options

 

I just wanted to see my options