The Flexx Series is all about comfort, support, and performance. If you are an active user looking for a custom-made wheelchair, explore the many options that the Flexx Series has to offer and find the right combination to match you and your needs. The Flexx HD (KM-8022HD / KM-8522HD) is a heavy-duty version of the standard Flexx wheelchair. It can support up to 170kg and features an extra large seat options with larger width and depth. The sturdy double cross brace and adjustable center-of-gravity provide better stability. All the Flexx accessories are compatible with the Flexx HD.