A wheelchair frame having a side part for supporting the drive wheel of the wheelchair comprising:a first (121) and a second elongated (122) horizontal tube, each defining opposite first (123) and second ends (124),a vertical distance tube 14 interconnecting said first (121) and second (122) elongated tubes and keeping said first (121) and second elongated tubes (122) in vertical, spaced apart and parallel relationship,a substantially U-shaped wheel bracket supporting tubular structure (126) defining two outwardly protruding parallel tubular end parts (127,128)a first and a second set of male and female guiding means, said first set interconnecting said first elongated horizontal tube (121) at said first end (123) thereof with one (127) of said outwardly protruding parallel tubular end parts (127,128), said second set interconnecting said second elongated horizontal tube (122) at said first end (123) thereof with another one (128) of said outwardly protruding parallel tubular end parts (127,128) allowing said substantially U-shaped wheel bracket supporting tubular structure (126) to be shifted horizontally relative to said first (121) and second (122) elongated horizontal tubes, anda first (130) and a second arresting means (131) for locking said U-shaped wheel bracket supporting tubular structure relative to said first (121) and second (122) elongated horizontal tubes.
