I've used 180 and 190, I remember switching to the 180 and finding the steering just seemed more consistent on direction changes. We swapped tyres Fri lunch from 180 am to 190 pm and there was a difference going from left to right or vice versa. Like a slight reluctance when you hit upright ? Not sure it was worse, just different. I think Dickie, Mike et al are right that the 180 is the right size for the 5.5in rim so Nelly tells me, but I also think you get a bigggggger contact patch with 190 although could be wrong ? Usual applies imo, use whatever you prefer and enjoy riding on, the 190 was a cheap part-worn so thats what sorted it for me this time !!
