Solid roller lifters

What is the wheel diameter on those lifters?
I will check when I get home. I'll see if there is one that is still round. These have less than 3000 miles on them. I have a separate thread on my issue. I don't want to take f
that looks like crap in the motor more than a bad lifter, on second thought looks like the bearings came apart.
ha! Crap came from the lifters from ideling around town. The lifters may be ok for track use, but in my case it was the wrong application. I had muscle motors build the motor for me, I did not know enough about lifter selection etc. I guess that helped with my "good deal".