Bike-Ball-Bearing-Retainer, Bicycle-Ball-Bearings, 5/16" x 9-Balls-Bike-Crank - 4 Pcs Replacement Mountain Bike Parts Repair Accessories for MTB Bicycle Crank Bottom Bracket

My son’s bike had a rusted and failed bearing. I used this kit to replace the original broken bearings, and he is very happy to have his bike again.

My brother has a Sun trike and these bearings fit the crank assembly perfectly. I recommend globbing a bunch of all-purpose grease on 'em when you do the installation. Some general advice: Make sure you thoroughly clean out the crank "bracket" area (the tube where the crank goes through) with brake cleaner, etc. before you install 'em. Sometimes bits of metal from the old bearings can stick to the top of the housing due to old grease, and you don't want that stuff getting into your nice new bearings. Wipe thoroughly! :D

Haven’t installed these yet but look like a good quality bearing

Worked as stated

Great product and if they come broken you can get free replacement

Nice.

After installing properly, these did not even last a summer. Now I know why they sell 4 at a time...I went and purchased a quality set of bearings now and they have lasted longer than these did. Do yourselves a favor and get quality over price..

These bearings fit the bottom bracket of my Beach cruiser perfectly. I have 2 more for the next time for bearing replacement...

アルインコのエアロバイクのベアリングがダメになり同じサイズのものを探していましたが、12ボールであったのでどこにも売っておらずこの同サイズ9ボールを試してみましたが2か月たった今でも問題なく使用できています。