tailmount

Tailmount refers to a type of bicycle component mounting system. Specifically, it describes the way a rear bicycle rack or fender is attached to the frame of the bicycle. In a tailmount system, the rack or fender is secured to the rear dropout, which is the part of the frame where the rear wheel axle is inserted. This is in contrast to some other mounting methods that might use braze-ons or clamps at different points on the frame.

Tailmounting is a common and traditional method for attaching accessories to the rear of a bicycle. Racks attached via tailmount are generally considered stable and capable of carrying significant weight. Similarly, fenders mounted this way are effectively positioned to protect the rider from spray from the rear wheel. The dropout attachment point is robust and designed to handle the stresses associated with riding and carrying loads.

The term "tailmount" itself is descriptive, indicating the mounting location at the "tail" or rear end of the bicycle frame. This system is prevalent on many types of bicycles, including touring bikes, commuters, and some mountain bikes, where the utility of carrying gear or fenders is desired. The availability of specific mounting points at the dropouts is often a design consideration for manufacturers when producing frames intended for accessories.