Mine are height adjustable and mount behind the tines. But about 95% of the time they're raised up and out of the way. They don't permit the kind of aggressive work I need out of the rake. So given the purposes for which I use the rake, they turned out to be a waste of money. Once I got more adept with the hydraulic position and draft controls, gauge wheels became redundant. The 5% of the I have used them in the past was either to level fresh gravel, or to wind-row cut weeds for burning. But it's been several years since they've been lowered. I've even given thought to simply taking them off and putting them on a shelf.
//greg//