The Cruiser X4 Wheelchair is ultra-lightweight yet extremely strong thanks to its aluminum and carbon steel frame which is specially designed to allow for custom seat backs and accessories and includes a patented adjustable-depth seat, and its rear wheels can be quickly and easily moved between three separate axles to adjust the seat to the ideal height for the user or to angle the seat back. Other comfort adjustments include armrest height; seat back height; and the height and angle of the front caster wheels - all allowing you to tailor the Cruiser X4 to your specific needs. The Cruiser X4 also offers push-to-lock wheel locks to make locking the rear wheels easy - even for those with less hand strength.