Don’t include personal or financial information like your National Insurance number or credit card details.
Making a bunch of assumptions about usage, you're up for a set of six of these huge hoops a year plus a spare, giving you a 10-year tire budget of around $2.66 million per truck. (These figures are adapted from the ASW company's own comparison spreadsheets, which use rubber tire pricing of $110,000 each from 2009. These tires are now much cheaper according to our research.)

A picture of the very incomplete gantry as it currently is, to give a better idea of what I'm up to: < > The only other way to get wheels to turn is either roll them freely unbound to anything, or attach them to a rotor. You can adjust the suspension settings to make them ridged, and you can use vertically oriented suspensions to prevent side wobble as if it was on rails. Wheels lack any form of propulsion on their own. They also lack any form of innate rotation ability. They're just cylindrical objects, exactly as they are in the real world (try welding a wheel directly to something sometime and see how well it spins). You need to provide an axle to them, and propulsion should you require it as well.
Wheelchair design has evolved in recent years but users can still find it demanding to propel themselves. That can be especially difficult and uncomfortable on rough surfaces such as cobbles and paving stones.