Llewellyn Gear Boss

The third Design and Form by Llewellyn.

Year 2005.

31.8 and 35mm down tube gear adjuster bosses. (the little fellas)

Today it is not very often one needs to use the downtube lever braze, STI and Ergo gear/brake levers have been the norm since 1992. However, for some groupsets and some frame designs, we needed a simple gear cable adjuster boss for the down tube. There was nothing that was functional or elegant available. My desires and needs set my mind into gear. The new boss needed to use standard M5 gear cable adjusters. It needed a counter bore for the adjuster spring to sit in so when the spring is turned it does not chew paint off, thus keeping all neat and tidy. It needed to be easy to use in the frame construction process and have a good amount of shoreline to reduce possible stress risers on thin tubes.