Rock truck question

[NYHowie]

On the large trucks there is a piece that hangs between the duals. What is it called and what is it's function?

[Ken Orme]

They are used to prevent rocks becoming wedged between the tires. After time they could wear a hole in the sidewall of the tire.

I have no idea what they are called.

Ken O

[NYHowie]

I thought that but was not sure. Thanks

[sparkycuda]

Down my way - Kentucky & southern Indiana - they are called rock knockers. To prevent tire punctures, some quarries use large chains instead. They are looped below the wheel, between the tires with the two ends pinned to the underside of the bed. Also, some of the solid knockers have a football-shaped end welded on, giving a rounded surface that reduces damage the sidewall.

Ken

[NYHowie]

thanks guys. I knew this was the place to go.
God Bless and stay safe.