Adjusting Barrel
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Overview[edit | edit source]
Sheldon Brown's Entry[edit | edit source]
A hollow bolt, designed so that a gear or brake cable can run down through the center of it, but the housing stops inside the head of the barrel. This allows fine adjustment of cable tension without requiring the use of any tools. Adjusting barrels may be located at the end of any run of cable housing. On brakes, their primary function is to permit easy adjustment to take up the slack as the brake shoes wear down. On gear shifting cables, they help fine tune the indexing. [1]