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Before the first ride
6.1.5 Adjusting the seat position
The saddle can be shifted on the saddle frame. The 
right horizontal position ensures an optimal leverage 
position for legs. This prevents knee pain and painful 
incorrect pelvis positions. If you have displaced the 
saddle more than 10  mm, you then need to adjust the 
saddle height again since both settings affect one 
another.
 To adjust the seat position safely, either push the 
bicycle near to a wall, so that you can lean on the wall 
to support yourself or ask another person to hold the 
bicycle for you.
 Climb onto the bicycle. 
 Place the pedals into the vertical position (3 o'clock 
position) with your feet.
 The rider is sitting in the optimal sitting position if 
the knee cap perpendicular line runs through the 
pedal axle. If the perpendicular line crosses behind 
the pedal, bring the saddle forward. If the 
perpendicular line crosses in front of the pedal, 
bring the saddle back. Move the saddle within its 
permitted displacement range only (marked on the 
saddle stay).
Figure 40: Knee cap perpendicular line
90°
EN_034-11592_1.0_0.01_19.08.2018_HERCULES BOSCH Purion MY19_Inhalt.book  Seite 77  Montag, 19. November 2018  11:00 11