Looking at Dennis Kirk the OEM recomended size is 140/90 B16 77H, If I wanted to go a bit wider, would it be the 150/80 B16 77H, would it fit? Anybody put these on yet?

 

140/90 is the equivelent of the mu85 and that's the biggest that will fit on my 07 flhr without modifying the belt guard. Not sure about your flhx.

 

Nobody??

 

I put the 200/55/17 on my 11 FLSTFB love them so far approx 2k on them