Please observe the following:
Click
THIS!
See the attached tire size chart, post #9 in the thread.
***edit****
BTW, since it wasn't asked and doesn't matter, I of course am glad to share 'imo'. ;)
I tried a 130 S12 on the back. It was a terrific traction tire! I could hear it hum from the knobs tearing the air
and from it actually making the ground vibrate. The thing sounded like an aggressive rip chain on a saw..those things 'moan' in the air like some kinda' animal! Looking backward in gravel, the pattern of rocks the thing would spit out was incredible: Much wider and more of 'em (rocks) than the dunlop 756 I generally use.
It had a decent wear rate.
It had one awful lack, though. It's a directional tire..and the braking direction of things was terrible! Downhills in slop had a huge pucker factor. But then so did downhills in any conditions.
Just trying to stop on level ground was bad! One of those, 'The more brake I use, the faster I go!'.
Give it a shot and draw your own conclusions. I'd be interested in another pov.