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BB UN 40 compatible

Old 11-22-19, 10:29 AM
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delbiker1 
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BB UN 40 compatible

I have another project I started on and today was finally able to get the BB-UN40 out of the shell. PB blaster did the trick. It is 68 1.37-24 with a length of 113. The only BB 40 replacement I have found is a used one. I want to know if a BB26 68 1.37-24, length of 113 is compatible. It is for a Tiagra 9 speed crank set on a Fuji Ace. Thanks for any info regarding this issue.
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Old 11-22-19, 10:50 AM
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Yes it is compatible.
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Old 11-22-19, 10:52 AM
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PS.

This is also compatible:https://www.universalcycles.com/shop...9&category=268 in 113mm length.

It will have smoother and longer lasting bearings.
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Old 11-22-19, 11:02 AM
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Isn't 9-speed Tiagra, Hollowtech?
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Old 11-22-19, 12:07 PM
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Originally Posted by ThermionicScott View Post
Isn't 9-speed Tiagra, Hollowtech?
Depends on which model. Tiagra FC-4400 is a 9-speed square taper crank. Tiagra FC-4500 is a 9-speed HTII crank. Apparently Tiagra skipped HT1 entirely.
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Old 11-22-19, 01:22 PM
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Originally Posted by HillRider View Post
Depends on which model. Tiagra FC-4400 is a 9-speed square taper crank. Tiagra FC-4500 is a 9-speed HTII crank. Apparently Tiagra skipped HT1 entirely.
Ah, thanks. Interesting how the trickle-down plays out sometimes!
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