Slider Dropout
Eccentric Bottom Bracket

One of the many great things about Seven’s approach to frame building is that any one of our models can be custom designed as a single speed. This IMX, featuring an eccentric bottom bracket and disk-specific dropouts, is just one example of our many offerings.

Call it a craze or call it a way of life, the simplicity and purity of the single speed has made it an increasingly popular two-wheel phenomenon. If you’ve got a need for one speed, you’ve come to the right place. Seven offers single-speed versions of 29 frame models in three different dropout/bottom bracket configurations. That’s 87 single speed possibilities!

Choose traditional track-style horizontal dropouts and a standard threaded BB, vertical dropouts with an eccentric BB, or Seven’s sliding style (“slider”) dropout with a standard threaded BB.

Seven’s slider dropout system for Ti frames is lighter than other slider systems and is easier to set up, since there’s no chain tensioner to adjust. Our system employs an aluminum-to-aluminum interface and is textured so the parts grip each other tightly. What’s more, Seven’s bolt-on design allows for use of a derailleur in the future.

When CyclingNews.com set out to do the definitive 29" vs. 26" wheel test, they came to Seven to create two carefully considered comparison bikes. Though the “Two Niner” mountain bike may continue to be a hotly debated topic, if you’ve already made up your mind about their virtues, you’ll be happy to know that just about all Seven mountain bikes are available in a 29" wheel version. (To read CyclingNews.com’s test, visit their 2006 Tech archive.)