Commercial ramps are not adjustable to suit the front door threshold. They cannot deal with the height difference inside (100mm) and out (175mm) and allow the door to be closed with the ramps in position.
Two new wooden ramps, one for outside and one for inside, made from 12mm ply and coated with non-slip paint. Each ramp is supported on two legs at the high end with wood reinforcing stiffeners in line with the wheelchair wheel track.