Bike Forums - View Single Post - Questioning Bottom Bracket installation

11-17-13 | 02:46 PM

#4

FBinNY

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From: New Rochelle, NY

Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter

Quote:

Originally Posted by HillRider

I don't think this is accurate. The Dura Ace version of the Octalink bottom bracket is indeed adjustable and can be relubed and maintained, unlike the Ultegra (BB-6500) and 105(BB-5500) versions. A search on the Shimano Tech Document site for "BB-7700" turned up a .pdf of a Shimano tech document that describes both the installation and adjustment:

http://techdocs.shimano.com/media/te...9830646804.pdf

I stand corrected.

Unlike other cartridge BB, this one uses separate needle radial and ball thrust bearings. It allows adjustment for axial play by finding the bottom then backing off slightly. However, like other cartridges, there's no adjustment for radial baring wear.

The OP should follow the instructions and find the happiest medium between friction and play.

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