For years Permobil made a C500 and a C500 Lowrider. The Lowrider would do everything the regular C500 would but the seat height was lower for taller people (over 6ft) to be able to ride/drive in a minivan. With the introduction of the F series replacing the C series, the Lowrider option was dropped. For us that now use a F series this has caused an issue in our vans as we now sit too tall so our vision out of the windshield is limited, legs rub against the hand control rods and entering/exiting head clearance are just a few examples. I talked to my vendor about the issues and he suggested I start a petition to send to Permobil. How many others have this issue with any brand chair but would like to see the option for a lower seating height but still keep the seat elevator? The ground clearance is the same, just the seat height is lower.