Quite a bit depends on personal preference. Most tires are comparable these days as far as quality goes. Metzler you are just paying extra for the name. Pay more attention to the compound, the softer the tire the better it grips the goad but the faster it wears. I have liked the Dunlops I have run and have actually had that D404 on my bike and it worked well and wore OK. I run the IRC Wild Flare on the back with mixed results. I like the tire but I did have one blow out on me, that being said it was worn past time to replace.
Thanks, Dog33, That was helpful. I have IRC tires on an 89 Pacific Coast and it seems a bit more staid than the 90 PC with Dunlops which feels freer. I actually have another 90 PC800 I just bought with just 5250 miles on it and it also has Dunlops but they are the original 1989 Dunlops that came on it so I have not pushed it, but they have no side wall cracks that I've found and they ride pretty much like the newer Dunlops.
I just might try the D404 on my Triumph America, then.
