Questions tagged [bearings]

A bearing is an interface between parts that turn and parts that do not. The hubs in the wheels contain bearings, as do the bottom bracket, the head tube, and the pedals.

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3answers
54k views

how to reassemble mountain bike rear wheel hub and bearings

So I thought I would sort out my wheel bearings (after asking a few questions here first). Did the front without much of a problem, (reused the existing bearings at the moment, had not got round to ...
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3answers
34k views

Which lubricant/grease to use for ball bearings?

A little mishap happened today during cleaning my bicycle. I tried to take off the sprocket wheel for easier access, but instead I opened the lock nut of the hub (cassette type) and the balls came out....
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4answers
2k views

Cause of spalled cones?

Was getting a sort of rubbing sound from my front wheel, like rubbing brakes, but the sound continued even with the bridal loose. So I disassembled my front hub. Everything looked good until I got ...
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3answers
5k views

What kind of maintenance does a shimano dynamo hub need?

I have a shimano dynamo hub on the front of my bike. Does it need any special maintenance, or maybe it needs just a little synthetic grease once a year, like a normal front hub?
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7answers
17k views

Real measurable benefit to ceramic bearings?

Is there a real difference between riding on ceramic bearings and riding on stainless steel? How would you measure it? Does it require it to be every bearing in the drive train, or will each set of ...
7
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4answers
5k views

How do I know if my cone/cap/bearings need to be adjusted?

I have a custom road bike with (mostly) Shimano parts. I love to ride but I'm not so strong on the technical side. I have quick-release wheels; I regularly (3-4 times a year) put the bike in a bag ...
6
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3answers
444 views

Wilier oversize bottom bracket bearing cups for Shimano crank

My bike frame is a Wilier Imperiale with Campagnolo crankset. I am changing the crank to a Shimano 6800. The bottom bracket does not fit to the Shimano one. It is old version WILIER OVERSIZE BOTTOM ...
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5answers
10k views

Why only ball bearings on bicycles?

In general, ball bearings are applicable in higher speeds because of the smaller contact area and smaller friction force, but roller bearings can carry greater loads because the load applied to the ...
4
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1answer
216 views

I can't extract sealed bearings out of hub

I am attaching pictures of the rear hub of my Giant XTC Advanced 29” 1.5 2017. The hub is manufactured by Formula. I am unable to extract the bearings. I'm tapping hard from the side of pawls, ...
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3answers
11k views

Using Anti Seize in place of Grease

I bought Nickel Anti-Seize to prevent any corrosion issues between metals, and I generally like using it on my vehicles on bolts and anything I plan on removing later. I'm wondering where it would be ...
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2answers
916 views

How does pedaling power transfer to the bearings in Hollowtech II bottom bracket?

I just installed a Shimano Hollowtech II crank and bottom bracket on my bike, and I'm wondering how they work together. My understanding is that the bearings are located in little cups that screw ...
9
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4answers
68k views

When do bearings need to be replaced?

How do I know when bearings need to be replaced? Should I go by time? Or is there a symptom to guide me?
8
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1answer
979 views

Dent in bearing cone, try to get a new one, or can I keep riding like this?

So I opened my rearhub, because there was a lot of dirt in there after 4000 kilometers usage and I found that there is a little dent in the bearing cone. When I slide a bearing ball over that "dent" I ...
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2answers
6k views

How often should one service headset bearings?

How often should one disassemble one's headset and service the bearings, assuming it's a fairly new road bicycle with sealed cartridge bearings and is ridden every day?
7
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4answers
13k views

Bottom bracket making noise, should it be fixed now or can I wait until regular maintenance?

My bike has been ridden 4 months / 2000 miles and is no longer completely quiet. About a month ago I noticed a whispering noise like a wire brush sliding across a cymbal. It happens on the power-down-...
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2answers
121 views

Play in headset with no upper bearings on a tandem bicycle

I have a half recumbent tandem bicycle. The front fork headset (under the front cyclist) is loose: I can feel some play when I put the front brake on and try to move the bicycle front and back. I ...
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3answers
1k views

Bearings vs. bushings in rear derailleur jockey wheels - which should be more resistant to contamination?

This question came up in a forum I frequent. As background, many of us are familiar with ball bearings, as they are used in many places on bikes: the bottom bracket, the hubs, the headset, etc. Not ...
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2answers
2k views

What qualities of bicycle bearing grease?

What are the qualities of bicycle bearing grease that make it suitable for that use? (The reason I ask is that I need to get some and I'd rather get the non-bike equivalent grease at the auto parts ...
2
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1answer
4k views

Hub rebuild - cone dust cap conflict, hub integrated vs pressed on cone?

I had to rebuilt the rear Joytech hub on my 2008(ish) Schwinn High Timber after I broke the axle: My hubs have a integrated dust cover which consists of a rubber diaphragm that is pressed into the ...
2
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1answer
780 views

Single Speed/Fixie Wheels with cup and cone bearings

I need to replace the wheels on my cheap single speed/fixie bike (similar to a mango or purefix bike). The current wheels are 700 diameter deep-v style rims with Quando hubs that use cup and cone ...
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2answers
4k views

Identifying bottom bracket

First and foremost.. I'm slowly trying to replace my bottom bracket.. it makes a kind of knackered-bearings sound when I move the pedals round without the chain attached. This is because I've been bad ...
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3answers
3k views

How long does it take to replace bottom bracket bearings?

How long does it take to replace bottom bracket bearings? Is there anything that can make the procedure take more or less time? How does the type of mechanism affect repair time?
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2answers
424 views

Failing hub bearings on a beater bike (freewheel) — time to replace the bike?

I run an old Raleigh Michigan that only does about 12 miles per week and lives outside a station mostly exposed to the elements. While replacing the rear derailleur cable yesterday (it had almost ...