I choose the tire sizes based on a stock swing arm (no notch) and the front wheels measly 2.15 " width. personnaly, i like the wider tires, but do not like installing tires sizes that are not recommended for the rim width. I mounted a 160 on my 5.5" wheel (max wheel for a 160 is 5") the tire rode ok, handled ok, had a flat looking profile but just was not right compared to the 170's. With radials you get to change tires alot.
I am running a 180 now in lieu of the 170 and really can not tell any differance in turning effort. Still feels very neutral. The tire rides smooth, is quiet, and really hooks up. Hope this one last longer than 3900 miles.
Since it was raining today(we needed it) I found myself in the garage with very little that I wanted to do, so I measured the back tire offset. Mine came out to 1/4" to the right with carr wheels. I was expecting more considering some of our previous discussions. Not sure what this means, But there it is. I am not going to try a fix it.