Sealed 109mm Bottom bracket

Posted on Mon 19th, March 2018

• #1

jerrysk8

Looking for a sealed 109mm bottom bracket. Running Dura ace 7600 cranks and hubs and looking for that perfect chainline. What's available and where to buy? Thanks.
• #2

Tychom

Long out of production it is, but you've the option of the Shimano BB-7610 should you be able to find one.

More recently there's the Sugino CBB-SG75 which should work too.

If when you say 'sealed' you mean simply having rubber seals on the BB to keep water ingress to a minimum (and not cartridge bearings with seals) then you can take the seals and/or the cups entirely from a standard road BB-7400 bottom bracket and use them in-place of the '7600' bottom bracket cups - which are just 7400 cups without the rubber seals installed by default.

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