Thread: Uncaged bottom bracket bearings?
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Old 06-14-19, 07:00 AM
  #44  
63rickert
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Another take. 100,000 miles on a utility bike is roughly 10,000 hours of service. Cranks went around about 40,000,000 times. Nothing is designed for that kind of service life. That is civil engineering. Bridges. Not mechanical engineering.
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