Description
The Park Tool USA CBW-4 9-11mm Open End Brake Wrench is a compact specialty pedal wrench-category hand tool designed for brake, derailleur, and other small-fastener service on bicycles. Built for tight-access areas, this slim wrench fits common 9 mm and 11 mm fittings where bulkier shop tools can be awkward.
- Official Park Tool item CBW-4, also referred to as the Metric Wrench — 9 mm & 11 mm.
- Fits 9 mm and 11 mm wrench flats used on many brake cable pinch bolts, derailleur hardware, and small bicycle fasteners.
- Replaces worn or missing CBW-4 shop tools in home or professional service kits.
- A practical cbw- open end brake wrench replacement for mechanics who want the correct Park Tool profile and sizing.
Park Tool manufactures the CBW-4 from thin, nickel-plated steel for corrosion resistance and long service life. The low-profile body measures approximately 127 x 25 x 3.2 mm, giving you better access around calipers and other cramped assemblies than a standard open-end wrench. This park tool usa cbw- open end brake wrench is an OEM Park Tool product rather than a generic aftermarket copy, so fit and finish are consistent with the brand’s workshop standards. Installation difficulty is minimal because there is nothing to assemble – just keep it in your bench drawer, travel kit, or race-day toolbox for quick adjustments and repairs.
An OEM-quality replacement for your bicycle tool kit, with easy grab-and-go convenience and dependable Park Tool durability.



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