I'm pretty sure that warranty and/or insurance issues make swapping to a 180 unwise.
For myself, call me chicken, but I prefer the feel of road-rubber to side-wall, every time!
Seriously, I'm no expert, but there must be better ways of quicking the steering - using the adjustable steering head angle, track alignment or good old fashioned upping the rear-shock pre-load.
(I fully expect to be corrected in no uncertain terms here!)
