Big & Tall Bikes is a specialist bicycle retailer offering custom, semi-custom, and ready-to-ride bikes, components, apparel, and cycling services. Its brands include Zinn Cycles, Clydesdale, Tui, and KHS, alongside other makers such as Salsa, Surly, Lenz Sport, and Benno. The range covers road, gravel, mountain, touring, hybrid, tandem, fat, and electric bikes, as well as used bicycles.

Zinn Cycles has been building premium custom bicycles since 1982. Customers can receive personalized fitting and design support, including online measurement consultations and professional studio fittings, before a frame is built and assembled to suit their geometry, weight, riding style, preferences, and mobility needs. Clydesdale offers more affordable bikes designed for larger riders, while Tui provides proportionally designed lightweight bikes for small to medium-sized riders.

The store also sells custom-length cranks, wheels, frames, forks, drivetrains, and other components, plus cycling clothing, tools, accessories, books, and travel gear. Services include bike fitting, repairs, rentals and demos, chain waxing, and ongoing new-bike support. Big & Tall Bikes also offers financing and worldwide shipping.