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Rohloff, Tandem or Single Speed bike riders should. Each week, I get dozens of emails asking if they can upgrade their existing bicycle to our patented pat. These are from people who've bought expensive single speed bikes, Rohloff equipped bikes, or tandems that use eccentric bottom brackets referred to as EBB throughout this article.
The bottom bracket on a bicycle connects the crankset chainset to the bicycle and allows the crankset to rotate freely. It contains a spindle that the crankset attaches to, and the bearings that allow the spindle and cranks to rotate. The chainrings and pedals attach to the cranks.
Executive summary: There are two ways to install an eccentric bottom bracket shell. One of them is wrong. When it comes to working on bicycles, having a process is great—as long as you recognize any changes in the work that might disrupt that process.
There are a variety of options for single-speed chain tensioning, like spring-loaded tensioners or horizontal dropouts, but these add clutter to your rear triangle. The cleanest solution is to use an eccentric bottom bracket. And now, the Bushnell Eccentric Bottom Bracketthe undisputed champion of chain tensioning solutions, is a part of the Problem Solvers lineup.
The Niner BioCentric II makes adjustments easy across a wide range of gears and eliminates the need for adjustable dropouts, giving the cleanest possible solution for singlespeed use. No bolt on hubs, no chain tensioners cluttering your ride, no brake adjustments with gear changes. The BioCentric II offsets the bottom bracket spindle 8.
Those questions, and more, answered right here, in the most comprehensive guide to eccentric bottom brackets around. And if you still have questions after feasting on this, be sure to let us know in the comments section below. Off-center is definitely one way you could put it.
The Bushnell Eccentric Now, you may know some of us here, and you might even think that we've always been a little bit eccentric, and you would be correct, but this kind of eccentric is a little different. In the tandem world, the eccentric is one of those components that lives on a tandem, and when functioning properly, pretty much goes unnoticed.