0Fred@ReverseLogic

A common misconception about Race Ramps is that the RR-XT-2 67" ramps offer an advantage over the RR-56-2 56" ramps with respect to low ground clearance cars. The 14" wide RR-XT-2 ramps do accommodate wider tires and their 10" high platforms allow for more wrench room while working under your car. But, since both ramp models have the same constant 10.7˚ incline, the 67" ramps do not offer any advantage over the 56" ramps when it comes to positioning the ramps ahead of the front tires. In the attached drawing the 56" and 67" ramps are shown with the starting edge at the same point which is an easy way to demonstrate that the extra 11" length of the 67" ramps is added to the platform end of the ramp.

If the 10.7˚ incline of the standard 56" and 67" models is too steep for your car, it's possible to extend the incline section of the ramp using Race Ramps XTenders which are available for both the RR-56-2 and RR-XT-2 ramps. Alternatively, you may wish to consider the more convenient 2-piece, 2-stage incline Race Ramps offered by Reverse Logic.

The RLL-72-2 ramps are essentially an RR-56-2 ramp with an integrated XTender. Likewise, the RLL-87-2 ramps are equivalent to the RR-XT-2 ramps with an integrated XTender. In the drawing below the 2-stage incline ramps are positioned with the platforms aligned with the corresponding 56" and 67" standard model platforms. Positioning the ramps on the drawing in this manner makes it easy to demonstrate how the 2-stage incline ramps extend the incline section end of the ramps. Extending this end of the ramp allows it to be used with lower cars.

Reverse Logic has been offering the 2-stage incline ramps since January 2011. We now stock both ramp models in standard duty (3000 pounds per pair capacity) and heavy duty (5000 pounds per pair) versions at our warehouse in Phoenixville, PA.

The 63" long incline section of the RLL-87-2 is close to the length of standard Race Ramps trailer ramps. Reverse Logic offers trailer ramps adapters to convert the RLL-87-2 incline into a trailer ramp. We offer the adapters with a 2" deep or 3" deep step. For Corvette owners who need both a service ramp and a trailer ramp, the 2-stage incline ramps along with the trailer ramp adapters is less expensive than purchasing dedicated service and trailer ramps.

If you need help to determine which ramps are best for your application, e-mail or PM me and I will work with you to identify the least expensive solution for your particular case.

0Fred@ReverseLogic

Here are a couple of graphs showing the path of the front bumper lip over the RR-XT-2 and RLL-87-2 ramps. The red line represents the car, and the blue line is the shape of the ramp. The values that generated these graphs are:

Wheelbase: 105.7"
Overhang from front axle: 34"
Ground clearance: 5"

The graphs demonstrate the increased ground clearance achieved when using the 2-stage incline RLL-87-2 ramps available through Reverse Logic. The graph for the RLL-87-2 ramps also approximates the clearance that would result from adding the RR-EX-14 XTenders to an existing pair of RR-XT-2 ramps.

Send me a PM or e-mail if you want a copy of the spreadsheet to generate the graphs for your particular car.

0Fred@ReverseLogic

Reverse Logic offers Progressive Incline Race Ramps for those few cases where the 2-Stage Incline Race Ramps are still too steep. Instead of two constant slopes, the Progressive Incline ramps have a curved top surface which gradually increases. The RLL-89-2 Race Ramps increase from 4˚ to 8˚ and the RLL-99-2 ramps start at 3.5˚.

Progressive Incline ramps can be used with cars that have 3" to 4" of ground clearance.


http://forums.corvetteforum.com/c6-t...duct-line.html

0Fred@ReverseLogic

Here's a photo of a 2011 GS with a ZR1 style splitter over the RLL-72-2 Race Ramps. The incline is pushed up against the front tire. The ramp clears both the splitter and air dam. Photo courtesy of B. Miller.

madmax4499

so they are two piece? once you remove the back half can you get a jack behind the front wheel to get the car up in the air?

0Fred@ReverseLogic

Yes, the RLL-72-2 ramps shown in the picture are a two piece design. But the closeup shot does not include the platform. The initial incline is 6.8˚. The slope increases to 10.7˚ at a point 42" up the ramp. The photo below shows the older style interconnect, but, the ramps I have in stock look like the those pictured in the drawings in post #1 above.

0Fred@ReverseLogic

The platforms on all Race Ramps two piece service ramps are about 30" long. It does not make a difference if the ramp is 8" high or 10" the platform length is the same.

The center of the tire will set about 11" from the front edge of the ramp. So you will have about 19" of platform behind the center of the front tire. If the tire is about 26" in diameter then the platform will extend about 6" behind the tire. The front jack points are much further than 6" behind the tires.

So to answer your question, you could get a floor jack behind the platform with the incline section removed.

But, why would you want to do this? Why wouldn't you raise the car from a central jack point in the front? Or if you needed to raise the car from the side, why put it on 8" or 10" high service ramps first?

madmax4499

good point!

Bandit1

If you're on the fence about the purchase of the newly designed 2 two-stage incline ramps, I recommend you get em. I contacted Fred with an inquiry regarding approach angle vs. vehicle air dam/nose height measurements and I received a response with the ramp and vehicle data for three different ramps that I was interested in, within an hour. Fred's sale pricing was way too good to pass up. I ordered the ramps and a set of chocks on a Mon evening, received confirmaton and a 'customer thank you' within minutes and they arrived on Wed. Now, that's OUTSTANDING customer service. Ramps and chocks are excellent build quality and best of all MADE IN THE USA!