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We replaced a Hollowtech bearing system because the cranks were hard and turning them was too much work because one of the bearings was stuck. This video will help you perform the replacement, preventive maintenance of the internal bearings and the correct installation of a Hollowtech II system. Hollowtech, Bicycle cranks, Hard cranks, Hollowtech bearing, Stuck Hollowtech, Hollowtech system maintenance, Hollowtech change, Hollowtech lubrication, Center axle, Center axle maintenance Intro: 0:00 Problem: 0:08 Tools: 1:03 Uninstallation: 1:40 Unboxing the new one: 5:12 Installation: 7:01 Bearing maintenance: 13:53 #SaulOrozco #BicycleMechanics #Shimano