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Your cart is empty.5 JJ-----Shimano BB-UN300 BOTTOM BRACKET - STANDARD -SHIMANO quality/performance cartridge bearing square bottom bracket -Better chainline stability with chain line stabilizer -Series: Shimano Tourney TX800 Series -Fits JIS square-taper cranksets -Hollow spindle -w/o fixing bolts -Adapter material: Aluminum. 1009904(014-023)3/16 --#22123(10:2/23/23:ARI 22723(30: 3/7/23:ARI---1:rtn on 3/20/23---1:rtn on 5/19/23----1:RTN ON 5/15/23 101623(20:10/30/23:ari 122623(20:1/4/24:ari 122823(20:1/4/24:ari----1:RTN ON 1/19/24
Jon Hunter
Reviewed in Canada on September 17, 2024
Product was not milled correctly and does not bottom out to the proper seated position.
Scott A. Frahmann
Reviewed in the United States on August 26, 2024
You can't go wrong with genuine Shimano parts. I had a cheap plastic cup one and that lasted a year. This is all metal and works awesome! I had a problem with the tool fitting the notches. That could have been the tool
tom
Reviewed in the United States on July 2, 2024
These do NOT last more than one or two summer. Stick with standard ball bearings and grease. After casual use, bike one mile to store once a week, has already failed. No way to add grease. better to just stick with axle and loose ball bearings so grease can be added. A lifetime bag of ball bearings costs about $5.
rje_nc
Reviewed in the United States on June 25, 2024
This was a significant upgrade over the old, worn out bearing set in an old Victory road bike that I saved from a neighbor's trash. very smooth action, should last the remaining life of the bike.
Leg01
Reviewed in the United States on November 19, 2024
Installed easily using the Teyssor Bike Bottom Bracket Removal Tool.
Mike
Reviewed in the United States on January 5, 2024
Purchased to replace original one in 1980’s rigid frame Rockhopper. Used the 68 x122.5 and it fit fine. It was slightly longer than the original so I had to adjust the front derailleur but it worked out perfectly. Seems well made. We’ll see how long it lasts.
Idelson de la Cruz
Reviewed in the United States on September 20, 2023
This ball bearing cartridge definitely is what my bike was missing!! If you measure correctly which one you need, it will make your bike feel like new again!! This bottom bracket easy to install and fit perfectly to my bike !
おが
Reviewed in Japan on March 19, 2023
初めてbbを交換しました。あらかじめシマノな相談して、適合するものでオススメを教えてもらましたので、問題ありませんでした？
peterservo
Reviewed in the United States on March 17, 2023
As an amateur bike mechanic, I did quite a bit of research regarding a replacement BB for my 93 Bridgestone. The original was non sealed and quite worn, so I replaced it with this one. While the drive side fit just fine, the non drive side housing did not thread all the way into my BB. I measured that, and it is 68mm which is what this unit is advertised as, yet no matter how I tried, I'm left with a couple threads sticking out the BB shell. From what I can tell, this is not a problem, but just in case I thought I should report that. Otherwise, its a very well made component and the price is right for sure.
V. Davis
Reviewed in the United States on December 26, 2023
If you have an old Trek 750 Multitrack, chances are, this is what you're looking for. Eventually the seals do fail on these, and when that happens after decades of service, it's finally time to get a new one. Thankfully Shimano is still making replacements after all these years. My bike is up and running like new again.Installation is an absolute bear. You will need specialized tools, probably a fair amount of brute force, and a lot of patience. Don't DIY this if you don't know what you're doing. Have your local bike shop install it.
wonderful
Reviewed in Japan on November 11, 2022
チェーンとギア廻りの交換に伴い、ついでにボトムブラケットも交換しました。チェーンやギアとは違い、そんなに消耗するような物でも無いけど、万全を期して交換する事をお薦めします。作業上の手間暇も、そんなに変わりませんし工賃も安くつくし。ただ難点は、規格が多すぎて迷いやすいと思います。ショップとよく相談してから、発注した方が良いです。
カスタマー
Reviewed in Japan on September 5, 2020
ジャイアントRX3のボトムブラケットに使用しました。自分的にはもう少し短いサイズでもよかったかも。
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