Review of Shimano UN54 Bottom Bracket, 68 X 107mm

Shimano UN54 Bottom Bracket, 68 X 107mm
By: Shimano Average Rating: 5.0 Total Reviews: 4
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nice medium grade hub

On: 2009-12-27

installed this in an old Raleigh mountain bike i found for 20 bucks and it is a nice moderate priced upgrade. work very smooth for a mid range quality bicycle.

FIX the sloppy crank!

On: 2009-12-05

My bottom bracket was wearing out fast. There was lots of "play" in the crank, and when I pedaled hard, it felt sloppy and made a clunky noise. I took my bike to a shop to have the bottom bracket repaired. They must have taken it out and worked on it, but I suspect the original was not a sealed bracket. They did a nice "tune up" of everything else, but only tightened the bottom bracket instead of replacing it. I didnt realize this until I got home and rode it. It was not good enough.

So I decided to do it right. You need an extractor to remove the pedal arms. (Its a kind of gear-puller.) You also need a special socket to loosen up the old bracket, and maybe a good pair of channel locks or vice grips, depending on whats holding it all together. On my bike, I had to turn BOTH SIDES FORWARD to loosen the bracket. (I learned this the hard way.) It rides like new now. I even replaced the bottom bracket on my step-daughters bike. Remember to tie the bike off the ground, right side up (to some garage rafters, maybe) in order to make it easy to work on. Youll need to measure the overall length of the bracket, to the outer edges of the square ends of the shaft, and the inner length of the cylinder, to get the right part. Make sure you get the right one. Ask a bike expert if you need some help. I did!

As an Amazon affiliate myself ([...]; My AMAZON Site, My STORES) Id recommend this product.

So much better than trying to adjust loose bearings

On: 2009-06-27

It was easy to replace my loose bearings on cages with this sealed bearing. Not too loose, not to tight...never needs adjustment or disassembly to clean. This is the way to go.

Note you will need a bottom bracket tool and a crank puller to replace them...but it is worth it. The hardest part is figuring out exactly what size you need and exactly which tools you need.

The decentest BB for the money

On: 2008-09-03

These bottom brackets are decent, which is good for the 20 bucks, and easy to replace when they do go out. Yaaaaah! I dont know what else to say... Oh, they arent crazy heavy either. Just a good middle of the road bottom bracket that will getcha all over town for real cheap.