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Park's Lockring Wrench is for installing and removing the adjustable-cup lockring used on Dura-Ace and XTR bottom brackets that use a left-side lockring (it fits several other models and brands of lockrings, too). The Lockring Wrench is laser cut and engages 5 of the lockring's 6 notches for a precise, secure fit. The vinyl-coated handle offers a great grip, too.
Features and Information
The major diameter of this tool is nominally 46.5mm. The minor diameter (at the notches), is nominally 41mm.
I contacted Park Tool about which BBT I should use on the lock ring for an early 70's Campy Nuovo Record. They told me this one, the BBT-7. They said the fit isn't perfect, but its not enough off to justify a separate production line for this tool. My vintage Campy lock ring tool is on the road somewhere in North Florida after bouncing out years ago. Good luck!
Bottom LineYes, I would recommend this to a friend
The Independently Owned Trek Bicycle Stores of Omaha, Kansas City and St. Louis are committed to your complete satisfaction. Please contact us if there is anything we can do to enhance your cycling experience.