Patent ID: 7182358

Claim:
A bicycle adjustment device, in particular for adjusting the height of the front wheel suspension, of the rear wheel suspension, of the saddle or of the steering mechanism, wherein the adjustment device has a double-acting piston/cylinder assembly with a first cylinder space ( 14 a , 34 a ) and a second cylinder space ( 15 a , 35 a ), wherein the two cylinder spaces ( 14 a , 34 a ; 15 a , 35 a ) are interconnectable via a fluid duct ( 16 a , 16 b , 12 a , 12 b ), and/or whereby the first cylinder space ( 14 a , 34 a ) and the second cylinder space ( 15 a , 35 a ) are separated from each other by a piston, wherein the area of the piston delimiting the first cylinder space ( 14 a , 34 a ) is larger than the area of the piston delimiting the second cylinder space ( 15 a , 35 a ), and a locking mechanism ( 85 a , 11 ) for fixing the piston, in which the fluid duct ( 16 a , 16 b , 12 a , 12 b ) can be closed by means of a shut-off mechanism ( 42 ), and in which the shut-off mechanism ( 42 ) is held in one setting by means of air pressure, whereby the fluid duct ( 16 a , 16 b , 12 a , 12 b ) is blocked.