Park Tool Bottom Bracket Tool BBT-59.3 drumbeat21-1722 whilst protecting any existing DWR

whilst protecting any existing DWR treatments and the breathability of the material

- Compact enough for roadside/trailside repairs and sturdy enough for use in the workshop

It's thin enough to get a precise fit inside your cycling shoe

- Hydraulic lockout suspension

and accurately gauges the straightness of any disc brake rotor while the wheel is mounted in the stand

Park Tool Bottom Bracket Tool BBT-59.3 drumbeat21-1722 whilst protecting any existing DWRFits 16 notch threaded bottom bracket tool fittings with a major diameter (outside of notches) of 41 42 mm and a minor diameter (inside of notches) of 39 mm, including: Shimano Ultegra BBR60 Shimano Deore XT MT 800