Ceramic bearing BSA bottom bracket

Great product

Fits well so far so smooth, bang for the buck

If you are using the bb aluminum sleeve the total width measurement is 73 mm. So you do have to use all the spacers if you have 68mm bb shel on your bike . So it is not going to fit your road bike without the spacers. Or you need a longer crank axle for your road bike. So either you don’t use the sleeve ( no water protection) or longer axle. Right now I use it without the sleeve. And it makes crunchy sound without the metal sleeve. Maybe it’s my fault but definitely not for 68mm bb shel .

Well Sorry to say I am very disappointed there is no way this will fit on a 68mm bottom Bracket when it comes out the package measuring 75mm.

It isn't bad for 30 bucks and i like it better than the gxp bttomm bracket that i blew through 4 of them in the past 5 years . I figure to try this cheap things out on some omniums. Of you plan on using this one a track bike with omniums you need to throw away the dust cover between the cups and spacersIf you use them on a pair of omniums and try using the cup and spacers , you won't be able to properly engage the crankarms .Other than that it works pretty good.Oddly it's harder to get going compared to the gxp but once it goes it really just goes.

Clean install, everything was as advertised, good craftsmanship overall.

I ride vintage, I am a finisher and not a podium finisher. Maybe I can attempt a 70.3 or a century, but a newer bike isn’t putting me on the podium. And bottom brackets get crusty with time and need maintenance or replacement. The Shimano BB (spare) technically isn’t serviceable (stamped "Do Not Disassemble") and has been replaced at least once because I currently am using an FSA BB. Sometimes the “easy” button is replace that thing instead of watching videos and ordering different bearing cartridges to try and service something Shimano won’t tell you how or what parts nor sell you the parts.With multiple bottom bracket standards, you start with the frame. Mine is BSA threaded, as is this bottom bracket. My bike is 68-mm shell width; buy per your frame. This is a 73-mm shell width and comes with spacers to fit the narrower frame; I went slightly easier and simply installed the new bearing cups into the old shell and threw away the spacers and shell. The new shell is aluminum, the original shell is plastic, but they match up OK and save me some trouble dealing with the 68-mm shell width.Next is spindle diameter, the Shimano 7800 crankset is 24-mm spindle (I suspect this is a Shimano standard, and maybe FSA as I am currently using an FSA BB?). All dimensions match up, it installs easily enough. I didn’t worry about facing the frame with installation, and I used anti-seize on the threads. And hey, ceramic bearings are the hotness – right? Granted they are in steel races (hybrid), so ceramic is kind of marketing here and probably trying to sell you an upgrade when steel bearings are fine. Also these appear to be serviceable bearings, I popped one out of the cup; meaning you can repack these in the future or potentially measure and replace just the bearing cartridges themselves.I wish I could tell you this saved me watts, or that the ceramic bearings reduced friction, or that I am faster. But truth be told, you can’t compare a new bottom bracket to a crusty worn-out bottom bracket and come to conclusion that this is better than the Shimano (or FSA) equivalent. I don’t ride power meter either, at the age of my bike those power meters were pretty questionable compared to today’s technology and again anything that vintage is long since worn out (e.g. SRM 7800). But this gave me a new bottom bracket for a vintage and obsolete crankset, and likely using superior materials than what I removed. And let’s be honest, Shimano hasn’t put out a group set quite as stunningly gorgeous as the 7800 despite their updates; that thing is pure jewelry compared to anything since. For that, I win…

When this bottom bracket arrived, I forgot how light ceramic bearing can be. Compared to my chromed steel ball and steel race bearings. The ceramic bearings are also silky smooth.The machining is excellent, the center tube is aluminum not plastic. And has 0-ring seals. There are 3 spacer rings to fine tune fit and use as a 73mm MTB BB. Fit and finish is as good as any from Shimano, SRAM or FSA.I seem to have misplaced my BB cup tool. Otherwise, I'd test fit these cups into a bottom bracket shell. Looks like I need to buy another tool!I plan to use this as a road bike 68mm BB. Paired with either my FSA crank or a legacy Shimano Ultegra crank. These systems are pretty much standard and straight forward these days. And don't anticipate compatibility problems. These are nicely made BB's and I may buy more if they are reliable.