Mach2 Calculator Can I Safely Use the Quik Rack Mach2 with My RV? This form will help you determine if the rack and your specific bikes will work behind your specific vehicle. “*” indicates required fields "*" indicates required fields VRA-to-HPC of vehicle*VRA-to-HPC is the distance between the center of the rear axle and the center of the hitch pin in inches (see diagram).Ramp?*NoYesDo you plan to carry a ramp?Number of Bikes*1234Provide the weight for each bike below.Bike WeightsEnter the weight of each bike in whole pounds (round fractions up).Bike 1 WeightLbs.Bike 2 WeightLbs.Bike 3 WeightLbs.Bike 4 WeightLbs.Evaluate my configuration Δ