Originally Posted By: lyle
I have a pair of the 12k Rhino's. I've used them a couple of times and been very disappointed. They only lift about 6" so it gets pretty tight under a car using a creeper. Both times they've slipped forward when trying to drive a car up the ramps. The little rubber bumper under the front of the ramp does only 2 things: it leaves rubber marks on the garage floor, and then it falls off. I had to put a rug under the back of each ramp to keep them from slipping. This happens when using them on a '04 and '08 Taurus.
I had enough of that monkeying around, so I bucked up and bought a pair of welded aluminum 10" lift ramps. They're heavier and bulkier than the Rhino's, but worth the extra dollars as far as lift height and comfort. Now I have gobs of room to move around under the car, and they don't EVER slip when driving a car up them. Maybe the Rhino's will work for you, they just didn't for me.
I use the Rhinos to change the oil on my Nissan 370Z. They came with extenders and I have no problem with the front lip clearance. To stop them from skidding forward I went to Walmart and bought a cheap 24x36 rubber backed carpeted bathmat. Cut it lengthwise and put a piece under each ramp, rubber side down. It will keep the ramps from sliding out when driving up them, provided you give them a good kick first to make sure the edge is wedged under the tire a little before starting.