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Lockrlng wrench / spanner for Dura Ace and XTR - BBT-7 from Park Tool


Park Tool

The Park Tool BBT-7 Lockring spanner / wrench is used for installing and removing the lockring used on Shimano Dura Ace 7700 and Shimano XTR 950 Bottom Brackets

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Park ToolLockrlng wrench / spanner for Dura Ace and XTR - BBT-7

It is laser cut and engages five of the lockring's six notches for a precise, secure fit.

The handle is vinyl dipped for comfort and to help avoid scratches to your bike.

While made specifically to fit Dura Ace® and XTR® Lockrings, it also fits several other lockrings as well.


The major diameter of the tool is nominally 46.5mm. A ring can be no bigger than this size and fit the tool. The minor diameter (at the notches), is nominally 41mm.

Weight: 280 g / 10 oz

Park Tool Ref: BBT-5

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