I'm not sure what you're asking here... Proper grammar would help...
If you're asking what the grinding noise is when you have the quad on jackstands, and you have snow chains on, then it's probably the chains rubbing, as you indicated originally.
If you're asking what the grinding noise is when you have the quad on jackstands, without snow chains on, then you need to be more specific about where the grinding noise is coming from.
Does it sound like it's coming from the CV boot/hub/brake area?
Does it sound like it's coming from the front diff?
If you can't isolate the sound by ear, then try putting your hand on different parts while you rotate the wheel. You should be able to feel the grinding vibrations as you rotate the wheel.