Rider Scrubber challenges 20% slope test ramp of large garage cleaning

What are the maximum climb ramps for your rider scrubbers? Generally, the climb ramps are from 11% to 20% base on different size and brands of the ride on scrubbers.
For the large garage floor cleaning, it is a key requirement to consider the maximum 20% gradient to reach more of your facility .
And it is 20% for the CY DC860 and DC980 with strong front traction motor, which is why they can perfectly pass the challenges 20% slope test ramp of large garage floor cleaning.