
Park Tool BBT-29
The Park Tool BBT-29 is a double-ended bottom bracket wrench for 16-notch external cups, fitting both 39mm designs like Shimano Dura-Ace 9000 and XTR M980 and 48.5mm designs like FSA MegaEvo. It's for mechanics who work across modern low-profile and oversized external bottom brackets and want one tool that covers both.
- Double-ended bottom bracket wrench
- Fit 16-notch bearing cups with an outside diameter of 39mm (e.g. Shimano Dura-Ace 9000 series and XTR® 980 series) as well as 16-notch bearing cups with an outside diameter of 48.5mm (e.g. FSA MegaEvo)
Pairs well with

Park Tool BBT-29
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