The present invention relates to a seat and a wheelchair with such a seat having seat connection means for attachment of the seat to a wheelchair comprising a seat frame (101), a backrest (103), wherein the backrest is pivotably connected to the seat frame through a pivoting means (105), and a spring means (107) connected to the backrest at a first connection point (109) and at a second connection point (111) near the seat frame, wherein the second connection point (111) and the pivoting means (105) are spaced by the distance C. The seat comprises adjustment means (113) adapted for changing the distance C. Thereby the tension of the spring means can be easily adjusted and the seat can thereby be adapted to different weight and strength. It is thereby not necessary to replace the spring with a spring having a different tension.
