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37
votes
3answers
13k views

Why do men's bicycles have a top tube while women's bicycles don't?

Bicycles intended for men have a top tube that always hits me on that embrassing part when I brake. Conversely, women's bikes often don't have a top tube. Why is this?
15
votes
6answers
15k 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 ...
10
votes
4answers
3k 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 ...
9
votes
3answers
3k 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?
9
votes
1answer
1k views

When to replace wheel bearings

I just ripped apart my mom's mountain bike's rear hub. One of the bearings was incredibly rough, so I replaced it, and the other one was smooth, but didn't turn very easily. Since I didn't have a ...
8
votes
2answers
6k 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 ...
7
votes
4answers
6k 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-...
7
votes
4answers
816 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 ...
6
votes
2answers
19k 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....
5
votes
4answers
3k 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 ...
5
votes
3answers
710 views

How to minimize damage from pitted cones?

While working on a old 60's Raleigh I found that there is slight pitting on one of the cones on the front hub (rest of the hub is good). Ideally I would replace the damaged part and move one, but ...
5
votes
1answer
170 views

When to replace FS bearings?

I know that when a fork stops working plushly, it should be serviced in order to escape permanent damage. When a chain is noisy, it should be oiled, and when it is worn - replaced - again to prevent ...
5
votes
2answers
538 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?
5
votes
4answers
9k views

How many ball bearings to put in an axis?

I'm cleaning out most of the axes on my new (second hand) bike. I'm replacing the grease inside the pedal axes and I was wondering. How many ball bearings should be inside? I thought there had to be ...
5
votes
1answer
719 views

When replacing wheel bearings, is there a standard or are they different for each type of bike

I have a claudebutler CapeWrath D24 (around 3 years old). My front (not sure about rear at this point) wheel bearings need replacing. The wheel it has is a Rigida Zac2000. I realize that some bikes ...
5
votes
1answer
2k views

How to maintain platform pedal bearings?

I have a pair of Redline platform pedals with plastic end caps and I notice one of them does not turn freely. They look about like this: http://www.redlinebicycles.com/uploaded/dynamic/430/124564-...
5
votes
3answers
325 views

Will slightly loose bearings result in damage?

I just overhauled some cheap bmx hubs. I installed new bearings and cones. Now I'm trying to get the hubs adjusted so that the bearings will last as long as possible. I had always thought that ...
4
votes
3answers
205 views

Were these bearings defective?

A couple of days ago my girlfriend's bicycle broke. The rear wheel was stuck. Tonight I had finally some spare time to have a look. The bearings had failed, so much so that the wheel must have spun ...
4
votes
3answers
23k 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?
3
votes
3answers
5k views

Can a front wheel have a different number of bearings on each side?

I took my old, filthy bike apart to clean it up. I have never done this before! When I took the front wheel bearings out, I ended up retrieving 9 from one side and 10 from the other. It seems like ...
3
votes
3answers
223 views

How to properly remove bearings from through-axle track hub

I am trying to learn the right way to remove bearings from a track hub. The bearings are cartridge bearings pressed into the hub. The axle has a ridge that prevents it from being removed while both ...
3
votes
2answers
131 views

What can be done to fix a hub that has come apart?

I noticed recently that my rear tyre was rubbing on the frame when I was pedalling hard; the wheel had a bit of horizontal play in it, so I thought the cones might need tightening. Anyway, I left it ...
3
votes
2answers
613 views

Do dry wheel bearings increase drag?

My kid trailer I have had for a few years has, in the past few weeks, been noticeably harder to pull. I checked it over and I found that not only are my wheel cones are a little loose, that I can ...
3
votes
1answer
77 views

Headset ball bearing size

I replaced my chewed up retainer bearing with a rusted but not so chewed up retainer bearing. What happened to the old one was that it was installed backwards and the retainer itself was completely ...
3
votes
2answers
141 views

What kind of grease is that?

So I just managed to remove the fork from the old frame I'm renovating. In the headset bearings, the grease looks odd! See these tiny metal balls? At least it looks like that... Is that on purpose, ...
3
votes
1answer
815 views

What maintenance is required after riding through deep water?

The road where I live is on a flood plain and tends to flood every winter. Despite this, I have continued riding to work through the water. I'm trying my best to dry the bike out at the end of the ...
3
votes
1answer
896 views

Replacing needle bearing threaded headset with an ordinary one

I got a bicycle like this one (90's trekking/city bike). When I got it, the headset seemed overtightened, when I took it apart I saw that it was somewhat damaged (looks like ridden for some time while ...
3
votes
1answer
50 views

Do the cups of headsets with cartridge bearings wear out?

On my bike I have an FSA headset Orbit X-CX which has cartridge bearrings. I re-grease the headset a few times each year and have recently replaced the lower bearing after ca 13,000 miles. The upper ...
3
votes
1answer
632 views

Does Enduro make a ceramic hybrid wheel bearing kit for WTB Laser Disc Lite hubs?

I would like to replace the bearings in my front and rear WTB Laser Disc Lite hubs. I'm interested in upgrading the OEM steel bearings to a ceramic hybrid. I've hear that Enduro is a quality ...
2
votes
2answers
2k views

Why is there so much friction on my rear wheel?

With the chain detached, when I spin my rear wheel it slows down really quickly (2 turns?) as if the brakes are lightly on. The brakes are well clear of the wheel though. Any idea what it might be? ...
2
votes
1answer
10k views

How do I prevent play in the steering post?

I recently changed my handlebar stem to an angle-adjustable variety and now there is a little bit of play in the bar coming up from the front suspension through the frame, onto which that stem is ...
2
votes
1answer
2k views

Can I replace steel bearings with ceramic bearings?

I'm using WH-550 from Shimano, can I replace my steel bearing balls with ceramic bearing balls?
2
votes
2answers
2k 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 ...
2
votes
1answer
231 views

Bottom bracket bearings grinding only when installed into frame

I recently purchased a new carbon frame direct from a Chinese manufacturer (link to the particular frame here). The frame has BB86 bottom bracket. I am using the SRAM Press Fit GXP BB86 Bottom ...
2
votes
1answer
34 views

Headset bearing size

I am going to be building a beach cruiser frame with 26" springer forks and 25" apehangers with a 1" headset. what is the difference between 5/32" x 16b and 3/16" x 15b, performance wise? Basically I ...
2
votes
1answer
36 views

Headset bearings open to closed type

My XC MTB has open type headset bearings, is it possible to replace them with closed type? The main problem is that I live in a flat and only place where to wash my bike after a muddy or dusty race ...
2
votes
1answer
334 views

Continuing to use damaged cones in rear hub?

I've read in many different places that if you take a hub apart and see damage on the cups, cones, or bearings (may god have mercy on you if your cups are damaged) That they must be replaced. I ...
1
vote
3answers
855 views

Is it fine to clean bearings with gasoline?

I've been searching all over the web about washing bearings with Gasoline (and other gas products like desiel and kerosene). I've found some mixed answers. Some say it's good some say it isn't. I want ...
1
vote
3answers
2k views

Can I use cartridge bearings on my wheel hub?

I have a vintage road bike, at the moment there are loose metal bearings in the hubs. Some of the bearings are missing. Can I buy cartridge bearings or do I need to buy loose bearings? Thanks
1
vote
3answers
183 views

Front fork pulling to center / “indexed steering”

So I took my bike in to the repair shop, to have the rear wheel replaced, but after the repair I noticed immediately the steering feeling a bit strange. I've since worked out why. The problem is that ...
1
vote
3answers
110 views

Rear hub bearing replacement

Bike noob here. I have a Quando rear hub with a busted cap? By cap I mean the cap covering the bearings beneath the cone. This cap is separate from the bearings. It hold the balls in place. Is it ...
1
vote
5answers
1k views

greasing closed bearings on the outside

Assume I have a couple of closed bearings on some pivots on my bicycle. These bearings: are fitted on a housing have an axle going through them are tightened by bolts which also have cups to "...
1
vote
2answers
263 views

Can I replace my 1/4" wheel bearings with slightly smaller ones?

On my back wheel on one side balls won't fit! I am 100% certain they are the same balls I took out easily with the magnet on my screwdriver several weeks ago to mail my bike home. They are 1/4" balls....
1
vote
1answer
894 views

Could I have damaged the bearings/cone when replacing a tire? Front wheel wobbles side to side

Last evening I installed new tires on my bicycle. The front wheel now wobbles side to side. I notice a small movement about 1-2 mm near the hub/axle cone. I checked to see if the skewer is all the ...
1
vote
3answers
2k 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?
1
vote
1answer
121 views

2 size bearings for hub which side of hub gets the bigger or smaller bearings?

The rear axel is a Kung Ten W5ER from a 1999 Trek 4000. The freehub was sticking so I was taking the axle apart to free up / clean / lube the freehub. I noticed after it was apart that there are 2 ...
1
vote
1answer
767 views

Headest: replace bearings or entire headset

I realize this will be different for all headsets, but: I have a Tange Levin headset. The headset is starting to show wear: the fork sticks at regular intervals through its turning. I've inspected ...
1
vote
2answers
2k views

What causes a wheel to seize?

My rear fixed-gear wheel seized up yesterday on my commute home. I suspect it's the result of my bone-headed adjustment after replacing a broken locknut on the axle (I may not have put the new ...
1
vote
1answer
22 views

Where to find a 14.4 mm long and 16.9 mm wide hub cone?

I was servicing my bike's ball bearings in my wheels when I noticed that the rear hub cones need to be replaced, as they are heavily wearing down. I looked online for replacement hubs but none fit the ...
1
vote
1answer
1k 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 ...