Shimano made the Dyna Drive system for road bikes back in the 80s before clipless. Special crank with a giant pedal attachment hole with the bearing inside the threaded bit. Pedal sat below the "axle". I believe the pedals went through bearings quickly. All the riders weight was cantilevered off that bearing. I think that may be why certain flat pedals with the large bearing at the inboard side with a smaller bearing under the foot go through bearings. Shimano clipless pedal bearings last a really long time. They are located under the foot. Better able to handle forces?
Jan. 4, 2023, 7:05 p.m. - Andy Eunson
Shimano made the Dyna Drive system for road bikes back in the 80s before clipless. Special crank with a giant pedal attachment hole with the bearing inside the threaded bit. Pedal sat below the "axle". I believe the pedals went through bearings quickly. All the riders weight was cantilevered off that bearing. I think that may be why certain flat pedals with the large bearing at the inboard side with a smaller bearing under the foot go through bearings. Shimano clipless pedal bearings last a really long time. They are located under the foot. Better able to handle forces?