Is it possible to replace bearings in Shimano XT bottom bracket cups?

Asked by: Meghan Hart

Can I replace the bearings in my bottom bracket?

bottom brackets is the ability to replace the bearings without degrading the cups, and in the case of our thread-together bottom brackets, you can replace your bearings while leaving the cups in the frame.

How do you remove the bearings from a bottom bracket cup?

Quote from video: And you can most likely turn it with your fingers. For the drop side cup there will be a left hand thread for an English threaded bottom bracket or right hand thread for an Italian bottom bracket.

How do you change a Shimano bottom bracket bearing?

Quote from video: Place the tool on the cups. And hold it tight and straight to loosen the cups in the frame. Generally. You push clockwise on the right hand side anti-clockwise. On the left.

Are Shimano bottom brackets serviceable?

Shimano don’t recommend that you service your BB bearings mainly because you stand a reasonable chance of damaging the seals taking the bearings in and out of the cups.

How long should bottom bracket bearings last?

As for a bottom bracket, on the low end, maybe 5000 miles. The basic Shimano one most people use (UN51/55/similar) can reasonably expect 10k+ miles. But sometimes you get unlucky and get a bottom bracket that lasts maybe 500 miles. You may have just gotten a lemon.

When should I replace my bottom bracket bearings?

To check if your BB needs replacing, drop the chain off of the smallest chainring and spin the cranks. If there’s a side-to-side wobble, or feeling of grittiness, it’s time for a new one.

How do you remove a bearing from a cup?

Quote from video: All right simply insert the tool into the top of the head to feed it through until stops get a hammer that's my hammer but get a hammer or it literally just bang on the end of it.

Can you service a sealed cartridge bottom bracket?

Servicing them may be possible only if the design has the bearing seals exposed. Full one piece sealed cartridge style bottom brackets (octalink,square taper) are simply replace only. Depending on which sealed cartridge you have, you would need the appropriate tool to remove and replace them.

How do you service a sealed cartridge bearing?

Quote from video: Make sure that it's all the dirt is gone there's no grease there's no grime. Once that's done just rinse it underneath the tap just to make sure that all the degreaser has actually gone.

What size are Shimano bottom bracket bearings?

24mm Diameter Axle And Bearings.

Why is bottom bracket creaking?

Most of the time, the true cause is a loose chainring bolt—tighten them up and that’ll quiet most creaks. After you check the chainring bolts and if you still hear the noise, look at your pedals, crank bolts, seatpost, and seat. By checking these first, you’ll save an hour of digging into your bottom bracket.

How do you fix a squeaky bottom bracket?

To reduce bottom bracket creaking, clean the threads on the frame and bottom bracket thoroughly, then re-grease them. Teflon tape on the threads can help with stubborn cartridge bottom bracket squeaks. Then, reinstall with a drop of green Loctite on the threads. Finally, use a lubricant on the threads.

How do I know if my bottom bracket bearings are bad?

Quote from video: And see if you can feel knocking in the bearings hard to see sometimes you can feel it. Another good indicator is to use some other senses like a sense of feel and some hearing.

How long should a MTB bottom bracket last?

They SHOULD last 3000 miles!

Do I need to grease the bottom bracket?

How To Change A Shimano Bottom Bracket

Can you grease bottom bracket bearings?

In the case of the bottom bracket, you will use the grease when you install it, whether it is threaded, press fit or similar, and in the same way when you install or clean the cranks. The point of contact of the cranks with the bottom bracket should be greased too.

How do you fix a squeaky bottom bracket?

To reduce bottom bracket creaking, clean the threads on the frame and bottom bracket thoroughly, then re-grease them. Teflon tape on the threads can help with stubborn cartridge bottom bracket squeaks. Then, reinstall with a drop of green Loctite on the threads. Finally, use a lubricant on the threads.

What causes a creaking bottom bracket?

As the crank arms are rotating, the bottom bracket will make a dry creaky noise, and is usually caused by axle oscillation around dry bearings, where the grease inside has been washed out of the many contact points,” he says.

Can sealed bottom brackets be serviced?

Servicing them may be possible only if the design has the bearing seals exposed. Full one piece sealed cartridge style bottom brackets (octalink,square taper) are simply replace only. Depending on which sealed cartridge you have, you would need the appropriate tool to remove and replace them.

Can you grease a sealed bottom bracket?

Most modern ‘unit’ bottom bracket bearings such as the Hope BB you have are not meant to be disassembled or serviced. Some BB models can be re-greased by carefully popping off the plastic seals.

How do you lubricate bottom bracket bearings?

Quote from video: Film or grease on this surface. Against that dust.