When the gate is closed, there is about a 3 inch gap from the bottom corner of the gate to the driveway. When the gate opens, it comes up against a higher part of the driveway and skids on it, getting the garage gate arm stuck.
Right now, I've propped up some bricks near the fence to stop the gate from hitting the driveway fully (it only skids when it's nearly fully open), so that the arm knows to stop before.
I have an idea of putting a caster wheel on the corner that skids with the wheel as close to the bottom of the gate as I can get, so that when it hits that part of the driveway where it skids, it instead rolls and the wheel helps lift up the gate a bit.
The complicating part is that when closed, there's that gap.
My thought is to get a wheel that has 3 inches of 'give'; when the gate is open, there is no give left and the wheel is fully supporting the weight of the gate; and as it closes, the wheel falls down its 'give' until it's fully extended at the end.
Does such a thing exist? I've seen gate casters that have springs, but I believe those springs are mainly to account for shock absorption. Alternately, should I not care about the state of it being closed and just get a static caster (which is touching the ground when open, but hanging off the corner when closed)?