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Your cart is empty.BB-UN300 Square Spindle Bottom BracketsFeatures-Fits JIS square-taper cranksets-Crankarm fixing bolts sold separately-Hollow spindleItem Specifications-BB Shell Width (mm):73 mm-Bottom Bracket Shell I.D.:1.37-BB/Frame Interface:English-Spindle Interface Type:Square Taper JIS-Spindle Length:118
Maht45
Reviewed in the United States on January 27, 2025
It works well.I only needed to respect the torque for installation, not to damage the bearings.The Q-Factor is important too; I use a crank with low Q-Factor which saves the BB life.
Kendrick C.
Reviewed in the United States on July 31, 2024
Wouldn't thread into frame. Though my frame was defective but bought another BB and that one went right in
Emilio
Reviewed in the United States on May 28, 2024
This is not a one size fit all....Get your measurements and do not listen to the discription... Do not mess up your bracket
Will
Reviewed in the United States on October 2, 2024
Shimano brand that I truster ever since
Music Mike
Reviewed in the United States on December 28, 2021
I like that the information about the part was correctly listed, however the image that was found online had text showing it as a 68, not 73mm body length. The bearings now feel very smooth, and I can't wait for the weather to lighten up that I can test it on the road. Perfect replacement, as I found the 73mm bracket is now rare to find and I am glad I could find one reasonably priced.
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