I ran a few sets of the bias with no issues. Loved the tires. Then in a matter of a few weeks I had a front bias ply separate. The tread just started to come off the carcass and a few weeks latter my radial rear developed some odd marks on it. The front had about 4,000 miles on it and still looked brand new.
I have a radial front now that I replaced the bias with the tread separation and switched to an Anakee rear.
Here's a shot of the rear, as you can see there's still a ton of tread. Not sure if I could have kept running the tire but I had two camping trips coming up and didn't want to be stuck somewhere.
I'm a tire pressure natzi and always keep them right at the high number. I'm pretty hard on tires in the dirt, but don't overly load the bike. I'm 190, and I can only pack so much into my Givi E21's.