John has added information to the article about Shimano Nexus and Alfine 8-speed internally-geared hubs, describing common failure modes and how to forestall failure; how to determine whether a hub might need service; and also normal noises and “clunks” which these hubs make, to avoid unnecessary alarm.
Tag: Nexus
Rollerbrakes article expanded
Major additions to the article on Shimano Rollerbrakes — advanced instruction on maintenance, more advice about when these brakes are most suitable.
New Shimano internal-gear hubs
Shimano has some new internal-gear hubs. We’ve updated the Shimano 3-speed page, and the internal-gear hubs page.
Shimano Internal-Gear Hubs
John has made major updates to the pages on Shimano Nexus and Alfine internal-gear hubs — 3-speed, 7-speed and 8-speed; also a page with general mechanical information.
Assembly of Shimano 7-speed Hub Axle Unit
Shimano’s service instructions for the Nexus 7-speed internal-gear hub assume that you will replace the entire axle unit. Taking disassembly past the point where instructions are available is all too easy. You might also want to cannibalize parts to assemble one axle unit that works from two or more which do not. Reader Keith Lang has provided instructions in two PDF files. You may go to John’s introduction with links to those files..
Internal gear theory
John has posted his article on internal-gear hub theory, history and some practical advice. This article describes the internal workings of all the newest hubs including those with compound and multi-stage gearing.
