These are the rear wheels off a powerchair:
http://www.ebay.co.uk/itm/281081050640? ... 1555.l2649
These are the front wheels off a powerchair:
http://www.ebay.co.uk/itm/POWER-CHAIR-W ... 4171bc7473
And these are some electric brakes off the motors which might be useful for a project?
http://www.ebay.co.uk/itm/POWER-CHAIR-W ... 4171bc70dc
