40% less shifting force required
Pedaling force is applied against the sleeve to help overcome sleeve return pressure and execute the shift.
![GCS](/content/dam/productsite/shimano/img/tech-description/gcs/gcs.png)
Shifting torque
Driver rotation torque
![GCS01](/content/dam/productsite/shimano/img/tech-description/gcs/gcs01.png)
Sun gear
Shifting Pawl
Sleeve
PAWL STUCK
![GCS02](/content/dam/productsite/shimano/img/tech-description/gcs/gcs02.png)
Sleeve
SUPPORT PAWL ACTIVATED
![GCS03](/content/dam/productsite/shimano/img/tech-description/gcs/gcs03.png)
Sleeve
SUPPORT PAWL
TURNS SLEEVE
TURNS SLEEVE
![GCS04](/content/dam/productsite/shimano/img/tech-description/gcs/gcs04.png)
Sun gear
Shifting Pawl
Sleeve
SLEEVE PUSHES
PAWL BACK
PAWL BACK