Originally Posted by DFLS
3.5 - 4" deep max depending on spike size but the penetration is adjustable by the height of the roller behind the spike drum. (or by the 3 point hitch on the tractor)
Mine weighs +/- 1000 so it gets full penetration even in the hard dry soil.
With a heavy rain after the aeravation you can see and feel just how soft the ground becomes -- huge difference
Uneven ground works too it pivits back and forth and side to side.
I like the sound of that... 1000 lbs though, huh???
It's understandable why it is not a popular rental item...