I have the same problem. My lawn was sodded last year and it is still not
completely level. When I use the push mower, it bounces up and down and the
blade will drop too low sometimes and cut a circle into the lawn.

"Steve" wrote in message
news:wYXKc.6478$Zr.5033@okepread01...
I live in Oklahoma and have U3 Bermuda. I have these rings on my lawn
after
cutting the grass. I raised the lawnmower blade on my push mower and the
rings are still there. Any ideas???? My blade is sharp. My wheels are
set
even.