SR-11 Sprocket Remover from Park Tool
The 5 to 11-speed compatible SR-11 is used when removing cassette-type cogs from rear wheels.
It firmly holds the cassette cogs so a lock-ring tool can be used to remove the cassette lockring.
- To remove cassette cogs, fit cassette lockring tool (Park Tool FR-5 for Shimano® and similar, Park Tool BBT-5 for Campagnolo®) into splines of cassette lockring and install quick release skewer to prevent tool from slipping.
- Hold cassette cogs with SR-11 and turn lockring tool counterclockwise with hex end of second SR-11 (or an adjustable wrench) until lockring is removed and cassette cogs can be pulled from wheel.