Because mid wheel drive is frankly rubbish in the actual real world outdoors. Theres no way they can go the places I do, or work on soft ground, or a beach etc. Because those sprung arms with too small caster wheels lift the weight off the drive wheels, and push the sticky out rear casters into the ground as you reverse on say gravel or soft ground. And theres no suspension on most of the mid wheels where you actually sit!
And all my rear drive chairs have the seating laocated rearwards, making the chair easy to steer, with little weight over the front. And so I can pop front wheels up at will, (programmed correctly!). We tried this test.
INDOORS a freind in a Q6000 mid drive pride chair, cannot go into my bathroom, turn around and come out. But my 37 (inch long INCLUDING foot riggings), BM2 chair can. Its is more compact indoors than the typical mid drive. But when outdoors goes places that the mid drives with tiny caster wheels cannot. Its also more comfortable outdoors.
Rear drive CONFIGURED CORRECTLY can be as good indoors as a mid drive.
But are far better outdoors and offer better comfort.
The reason that the opposite is the general view, is because every rear drive chair is terrible. The salsa was a typical example it, like most, came with swing away footplates. This means, like almost all rear drive chairs, that the seating must be way too far forwards, with your feet in front of the castor wheels. Instead of between them. This means that rear drive stock chairs:
a) are way too long. So cannot turn indoors, and the drive wheel is too far behind you.
b) are far too nose heavy, making any turns indoors almost impossible and the chair doesent respond correctly compounded by the typical programming of stock chairs.
So I took a typical REAR DRIVE chair, the Salsa, and fixed it.
Ordered a CENTRE footplate, as it can then allow feet to fit further back between casters.
Moved seat back 4.5 inches.
Moved seat back, further back, by 1 inch.
Reprogrammed the chair so it responds properly.
Other changes not related like wheels, tyres, etc.
Look at seat position on mine:
STOCK CHAIR NOSE HEAVY
SAME BUT SEATING MOVED BACK
STOCK NOSE HEAVY REAR DRIVE CHAIR
ANOTHER
- Quickie-Salsa-R2-2014-Electric-wheelchair-TILT-ONLY.jpg (37.49 KiB) Viewed 16214 times
Compared to any other other rear drive chairs where all the weight is over the castor wheels...