That is not a style of ramp that I would crawl under. If the metal buckles, the car comes down. I realize they may stack nice, but I really don't trust that style at all even though a Mirage is light. Plus, this style slides on pavement easily, which can make them hard to climb. Especially if one ramp slides & the other side holds it spot.
MirageRally (07-26-2020)
It is some sort of high-density expanded foam. Don't confuse this with foam packaging materials. Each ramp can support 1500 pounds.
This Race Ramp review will show you what the differences are between these and a $40 set of plastic ramps. Both do the same job, but one is a lot easier to use.
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View my fuel log 2015 Mirage ES 1.2 manual: 52.2 mpg (US) ... 22.2 km/L ... 4.5 L/100 km ... 62.6 mpg (Imp)
MirageRally (07-26-2020)
I've used homemade wooden ramps, large floor jack, & a cheap scissor jack ($5 from a junk yard) to lift my Mirage.
If I am rotating tires, I sometimes just use the cheap scissor jack that I picked up at a junk yard years ago. A small scissor jack is light and easily/safely picks up a Mirage on a flat cement surface. At times, I use my floor jack, too. I'm not under the car doing this job. Change wheels and let car back down.
When I've used a jack to lift my car to do an oil change, I set the front wheels back down on a large wooden blocks. Parking brake is set firmly. Blocking rear wheels on top of that is good, too. I have never used jack stands (even though I have four) on my Mirage, but I wouldn't go under car with just a jack holding it either. I use one jack and set the front wheel back down on something solid like a solid patio block or wood block. Then I do the same to the other side. I thought I should clarify that. I mentioned jack stands, have them, but never use them on my Mirage.
About a year ago, I had some 2" x 8" boards leftover from another project. I made a ramp only 3 boards tall with a 4" x 4" block wood at the end (to prevent rolling past the small ramp). I just drive up those board ramps and lock my rear brake when I do oil changes now. 2" x 10" may be better, but for standard factory wheels this works just fine.
I could probably pull off an oil change without lifting the car, but it's just easier to have it lifted slightly. I haven't seen a ramp that looks stronger than the homemade ones made of solid lumber. The metal ramps with no cross braces look very unsafe to me. They can be difficult to drive up, too.
MirageRally (07-26-2020)
Just a thought for what you already have -
Place your car on your current ramps.
Place a long 2" x 4" under the front of your back wheels.
Measure the distance from the edge of your ramps to the spot the long 2" x 4" under your car is now in.
Next time you set up your ramps, place a long 2" x 4" that same distance from the ramps. As you climb up, the rear wheels hitting the 2" x 4" will help you know when to stop. If you accidentally roll over them, it won't hurt anything in the rear. I think that would be enough to help you sense when to stop. After you are on the ramps, you can move the same 2" x 4" behind the wheels to block them.
Given the low fronts on many new cars today, the length (more gradual slope) of the Race Ramp is a big plus. Being able to pull away the ramp portion once the car is parked is nice, too.
I like my ramps made of three stacked boards screwed together for my Mirage. Otherwise setting the wheels on something solid after lifting with a jack works, too. If I worked on lots of cars, having nicer more expensive ramps would be worth it. They are a great suggestion!
MirageRally (07-26-2020)