Eric, a Ph.D. candidateĀ in Mechanical Engineering at MIT, contacted us recently for a project. We donated a Shimano 3-Speed hub to open up and document for a presentation. He sent us back a few photos to show and tell. If you’ve always wanted, but never have opened up one of these hubs, behold:

Shimano Nexus 3 speed hub

Shimano Nexus 3 speed hub teardown by MIT student

Shimano Nexus 3 speed hub teardown by MIT student

Shimano Nexus 3 speed hub teardown by MIT student

Thanks again for sharing the photos with us. Best of luck with the project, Eric.