I have the D404 on a Goldwing...the GL1100 I...
It is a good tire for THAT bike. Rated properly and sized as per OEM specs. It will deliver good performance on that bike.
The 1500 is a different animal. Even though they have the size the rating is key to longevity.
In my opinion you simply wore that tire out.
What bother me is that the condition seems to surprise you..? Did you NOT notice it was wearing out whenever you checked your tires...I check my tires at elast once per week and sometime more often... Checking tires is more than just seeing if they are still on the bike....Get down on the ground and LOOK at the tread as you spin the tire..SEE the wear patterns and LOOK for any imperfections or penetrations...Check pressures every time...KNOW the condition of your tires at all times...I own 3 bikes and I can tell you the condition of any one of them RIGHT NOW without going out to look at them...
Your life may depend on this some day....If you have to trust your tires to keep you stuck to the road you might as well KNOW what they are doing...
Thanks Wingsconsin..... that is some sobering advice. I can promise I will not lack in my inspection routine again. I did inspect well before my last longer trip, but obviously I have been stupid!!!!!!!!! I do check pressure often but the glance at the visible rear down on the ground wasn't giving me the full picture.
This tire was the one I had to purchase in the middle of nowhere Texas when I was driving her home after buying the bike from Rudy in Atlanta. At that point I was thrilled to find a tire to go on it. It had a car tire that bulged in the heat. The next day was when I took my avatar pic...a fun little hail storm by Farmington New Mexico. Ah what a great trip.
Thanks also for the weight rating info. I don't pull the trailer much, but it is a heavy bike, seems even more so than my '93, probably all the secret stuff Rudy put on it haha! Now the next dilemma, E3's or something else......and go!!
Thanks to everyone else who replied. I do think it just got worn out. I do a lot of cornering but my tire wear would indicate differently....I guess I better try and scrape some pegs on the new set.