This off-road power wheelchair’s speed options are a nice touch, too. When building your 4ZS, you can choose from three different speeds. Remember that if you plan to ride your 4ZS with friends or family members who don’t use a wheelchair, the average walking speed of a human is 3 MPH.
4 MPH – This option is for extreme off-roading. It may be moving slow but it has gobs of torque to keep the wheels moving through any terrain.
8 MPH – This option is faster than the tracked wheelchairs and is a good balance of power and speed. A good all-around choice for a mixture of off- and on-road adventures.
12 MPH – With a higher top end but less torque this is a good choice for wheelchair users who want to keep up with friends as they jog along the beach.
Because you must choose this option when building your Overland 4ZS I believe this is permanent and cannot be easily changed later. You may want to choose the 4 MPH option because you plan to do a lot of off-roading, or maybe because you know your child well enough and don’t want to give them the option of going any faster.