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Park Tool Workshop Bottom Bracket Tool


The Park Tool BBT-5/FR-11, made from heat-treated alloy tool steel, is engineered for Campagnolo® cassette lockrings and cartridge bottom brackets. It features a 1″ tool fitting compatible with adjustable wrenches, sockets, or bench vises.

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EAN: 763477003515 SKU: WESPTBBT5FR11 Categories: ,
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Product Description

The right tools are crucial when working with bicycle components. The Park Tool BBT-5/FR-11 is specifically designed to accommodate the tool fittings found on Campagnolo® cassette lockrings and cartridge bottom brackets. Forged from heat-treated alloy tool steel for durability, the BBT-5/FR-11 comes with a 1″ tool fitting compatible with an adjustable wrench, socket, or bench vise.

Tech Specs

  • Fits 12 spline/approx. 22.8 mm OD tool fittings
  • Fits all Campagnolo® cassette lockrings
  • Also fits Campagnolo® cartridge bottom brackets including Chorus® and Centaur®
  • Base size for socket or wrench is 1" (25.4 mm)

NOTE: The BBT-5/FR-11 is not interchangeable with the FR-1.3, FR-5.2, or FR-7. Each tool fitting has its own unique tool profile.


Park Tool

In 1956, Hazel Park Radio and Bicycle Shop in St. Paul, Minnesota, primarily offered bike repairs using basic tools. Owners Howard Hawkins and Art Engstrom introduced a bicycle “repair stand” in 1963, which allowed easy access to bike parts. This stand gained popularity and led to the creation of more specialized tools as bikes became more complex.

By 1981, Howard and Art had sold their bike business to focus on Park Tool. The company expanded, offering over 500 products in 70 countries, and operates from a 100,000 square foot facility. Park Tool is now the preferred brand in the biking industry, not only for tools but also for repair tutorials and educational content.

Despite the evolving complexity of bikes, Park Tool’s mission remains unchanged: to create high-quality tools for both professional and amateur bike mechanics. The company attributes its success to its commitment to this mission, dedicated employees, and loyal customers. Park Tool is prepared to meet the challenges of bike maintenance in the future, just as it has for the past 60 years.