Sometimes I jack the car high enough to put the Rhino ramps under it, they are convenient in that there's more room down the middle, remembering to chock the other tires. And for exhaust work I'll use the ramps and jack stands to get it a little higher. I have the larger 16,000 lbs ramp set and 6 ton jack stands. The biggest vehicle here is a 4Runner with a V6, I think I'd use even more caution with anything bigger.
One trick is to rock the vehicle back a little to wedge the ramp under the tire before driving it up to keep them from sliding around but you can still end up with them uneven. Just pushing the top of the tire back a little can be enough to get the ramp wedged providing the rubber pad is still intact and serviceable. Trust your instincts and add support when you think you have to, that's the good kind of freight that may keep you from harm. I surely don't want anyone to get in over their ability but I thought I may add some guidance for those who are going to use ramps.
One trick is to rock the vehicle back a little to wedge the ramp under the tire before driving it up to keep them from sliding around but you can still end up with them uneven. Just pushing the top of the tire back a little can be enough to get the ramp wedged providing the rubber pad is still intact and serviceable. Trust your instincts and add support when you think you have to, that's the good kind of freight that may keep you from harm. I surely don't want anyone to get in over their ability but I thought I may add some guidance for those who are going to use ramps.