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Quick Engagement

SHIMANO’s rear road wheels and hubs are equipped with 18/16 notches for quick engagement.

In contrast to road racing, MTB XC tracks have many sharp turns and steep hills, where quick engagement is essential.

SHIMANO has improved the rear hubs of its high end MTB group sets and wheels and equipped them with 18/16 notches and two sets of pawls to double the engagement and optimize traction.

Free pedal travel degree 20°:18 notches
(18 contacts points/360°)

Road  FH/Wheels

Free pedal travel degree 10° (XTR, SAINT, DEORE XT, FH-M618):
18 notches (36 contacts points/360°)
11.25° (SLX):
16 notches (32 contacts points/360°)

MTB FH/Wheels 
Quick Engagement