Shimano Tiagra 4600 Bottom Bracket
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$9.68
RRP $19.37 Save 50%
In Stock
Code: SMBB4600B
Shimano Tiagra 4600 Bottom Bracket. English thread
  • Outboard Bottom bracket bearing cups for use with Tiagra FC4600, FC4603 and Compact FC4650 2-piece cap-free design chainsets
  • Minimal bearing interface gives superbly smooth rolling
  • Required for installation of FC4600, FC4603and FC4650 chainset
  • British thread
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With the required tooling and lubes this is an easy fit for a home mechanic of modest skills. Shimano 105 and Ultegra units aren't materially different or lighter and harder to get hold of now anyway in this form (the updated version compatible with 11 speed drivetrains have a revised smaller diameter outer shell requiring a different tool or adaptor for earlier tooling). This replacement cured my clicking crankset as I hoped it would for very little cost. Prompt delivery was very welcomed from Merlin.
Easy to fit. Smooth and quiet. Great price!
This will last 3000 miles, why spend more!
Much smoother than my standard BB and there is a lot less flex with the bearings being so much further out. Also seems to assist with power transfer as my average speed has already increased. Highly recommend.
I needed one of these with Italian threads, easy to fit providing you have the installation tools. Works really with the my Sora triple chainset. A good buy.
Great design. Used these before, easy to install