Those Mowing deck spindle reinforcement ring's are an Excellent add on. I in the past had never hit anything with my Mowing deck's so I did not have any worries about straightening them. About Six Year's ago I was mowing The lawn where my Father and Mother in law lived it was a rental house and it has Huge Oak Tree's in the Yard with Root's exposed. It was late in the fall & I had asked my Father to Rake the leaves away from the stump area of the Tree's so that I could see these Root's clearly. He did not get around to it, so when I was mowing I managed to Hit one of The very large Root's so violent that it stalled my John Deere 140 in it's Tracks.
I discovered that in the process of Hitting one of those Huge Root's that it bent my mowing deck under the Out side right Mowing deck blade spindle and I was Not Pleased.
I came home with it and removed the mowing deck as well as the Blade spindle assembly that was bent.
I then heated up the entire area with my Large gas Torch tip to a Red Cherry Hot state and used my Three Pound Maul to put it back to where it belonged being Level again checking it with my straight edge. The Mowing deck then Mowed right again Not scalping due to a bent deck at the Mowing blade spindle. I leaned a Good lesson to Not be Lazy in the future I did Not get close at all to The stump area of any of those Large Oak Trees.
For some Odd reason the Tree's in East Tennessee do Not root deep most have their root's exposed so when I had a stump Grinder home a couple of Year's ago, I ground all of the exposed Tree root's in my Yard so I would not have to worry about Hitting one with my new Replacement 48" deck that is on my 318. I am Not sure why Our Tree Root's are exposed as they are because the soil here is Not rock hard and we have very few rock's in it.
The Only thing that I can Think of that causes the Root's to be exposed as they are here is due to The Hot Humid summer heat and violent mountain Thunder rain storm's that we get perhaps' The Root's are exposed to get the water and or Moisture that they need easier ? Regards, Kurt