Questions tagged [hub]

Concerning the parts and mechanism of bike gearing, both internal and external. Multi-speed, single-speed, fixed and freewheel.

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44
votes
11answers
29k views

What's the efficiency of hub gears compared to derailleurs?

What's the efficiency of hub gears compared to derailleurs? I know that hub gears are not as efficient. Apart from being heavier, how much will I lose in performance if I use hub gears?
19
votes
6answers
30k views

6-bolt vs centre-lock: pros and cons?

I am having a new set of wheels built, and am trying to decide on whether to go with 6-bolt or centre-lock rotor interface. What are the pros and cons of the two systems?
19
votes
6answers
71k views

How often should I grease and repack my hubs and bottom bracket?

I am commuting 7 miles a day (round trip) in all weather in New England (temperate, moderately wet climate, cold winters). Overall I am putting about 1000 miles per year on my commuter bike, a 2009 ...
17
votes
6answers
17k views

How to prevent freehub body damage?

I feel like this is poor design. I have two wheelsets that are less than a year old which have damaged freehub bodys due to cogs digging in to the splines on the freehub. It's so bad that I can't ...
14
votes
11answers
21k views

Is there such thing as a freewheel that doesn't click?

The clicking sound of the freewheel on my singlespeed when it's coasting is annoying for me, so I flipped over my back wheel and rode fixed for a few months in blissful silence. But having to pedal ...
14
votes
4answers
12k views

Bottle dynamo vs. hub dynamo

I have SpinPOWER USB charger kit, and I am using a bottle dynamo with it. I have heard that the power output from a hub dynamo is higher than from a bottle dynamo. Does anyone have any information ...
13
votes
4answers
11k views

do DT Swiss 240 hubs need proprietary tools to maintain them?

the bearings in my DT Swiss 240 hub appear to be shot, I have the toolkit for and am used to maintaining Chris King hubs but I wonder if I have to get special proprietary tools for the DT hubs as well?...
11
votes
3answers
2k views

Busted my bike hub & derailleur (I think) - how bad is it?

I screwed up :( Background leading to my foolishness: I've been straining my bike quite a bit with hills and inclimate weather, and I haven't been able to find my maintenance kit since I've moved, so ...
11
votes
3answers
18k views

How to make a kid's bike easier to pedal

My daughter has a hand-me-down 16" wheel bike, and she finds the pedals very difficult to turn. The bike currently has a single-speed coaster hub on the back. Is there any way to replace the rear hub/...
11
votes
2answers
2k views

Do I require a washer/spacer/shim between a hub's cone nut and lock nut?

When replacing the cones for a front hub with new ones, is it okay to tighten the lock nut directly against the cone nut? Or must I use some kind of spacer / washer / shim in order for some other ...
9
votes
3answers
23k views

How do I change my single-speed to a fixed gear?

I've been biking on single-speed for a few months and would like to play around with a fixed gear. I've heard of a flip-flop hub, but I'm not sure exactly what it is. And without any fellow bikers - I'...
9
votes
4answers
605 views

Servicing a Vuelta XRP Disc Hub

I can't for the life of me figure out how to get the freehub body off of this hub. Everything I can find online about the Vuelta hubs says that I should be able to stick a 5mm hex key into both sides ...
9
votes
3answers
6k views

How do I clean the inside of a freehub?

I didn't know any better and I let degreaser drip into the freewheel body of my Shimano FH-RM65. Now it makes a terrible retching noise when it rotates. How do I clean the inside of this thing? I'm ...
9
votes
2answers
1k views

Chain stuck between cassette and spokes and damaged rear hub - any way to fix it?

My rear derailleur didn't have limit screws properly adjusted so when I shifted to the biggest chainring the chain jumped in between the cassette and spokes. I managed to get it out but then noticed ...
9
votes
2answers
1k views

Why are hub shells such different diameters?

I'm curious: why are some hub shells much larger diameter than others? Is it an aesthetic consideration? Or are there cost/functionality tradeoffs? Take for example this Dura-Ace hub -- pretty ...
8
votes
7answers
1k views

How to build a wheel

I'm in the planning stage of building a new bike. This will be a light road bike for city runs and transport. For racing I have other bikes. I'd like to build the bike from ground up by assembling ...
8
votes
7answers
22k views

7-speed MTB cassette on 8/9-speed wheel hub, where does spacer go?

Sheldon Brown says "Add a 4.5 mm spacer before installing a 7-speed cassette on an 8-, 9-, or 10-speed hub", but doesn't seem to show spacer placement in any picture. My direct experience is that the ...
8
votes
4answers
7k views

Trouble getting the right cup and cone hub adjustment

I have a pair of Shimano XT wheels and recently had issues with the hub on the rear wheel requiring new cones and bearings. These were fitted carefully but I've had issues getting the right adjustment ...
7
votes
3answers
2k views

Broken 26'' wheel

I need your recommendations. I have the issue with my rear rim. It was broken. And now I have a dilemma to buy a new wheel or buy a new rim and use hub, spokes from the previous wheel. One problem the ...
7
votes
4answers
67k views

Special hub requirements for an 11-speed group

In a question earlier today (Changing cassette from 8 to 10 or 11 to meet the Shimano 105 5800 groupset) the Op asserts that they would need to change their hub, if they wanted to go from a 10- to 11- ...
7
votes
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 ...
7
votes
1answer
1k views

Can my fork support disc brakes?

I want to put disc brakes on my bike but I do not know which type to put on
7
votes
5answers
2k views

Can hubs last forever?

In theory, could a bicycle hub last forever if you kept overhauling it (and getting new spokes and rims and etc.)? I'd like to know about all the hubs, but what really interests me is whether or not ...
7
votes
2answers
13k views

What's the deal/appeal with loud MTB hubs?

Why are a lot of mountain bikers looking to get hubs that make loud sounds? Does it have an advantage or use on the trails?
7
votes
1answer
389 views

Torpedo duomatic stuck in one gear because of too much grease. How to lubricate correctly?

I have a Speedo Duomatic that has been stuck in one gear the last 10 years. Probably because of too much lube in the wrong places. Now is the time to fix this. Everything is clean and I'm ready to put ...
7
votes
3answers
2k views

Flashpoint FP80 / SRAM S80 - rear hub specifications?

I'm looking for the specs of a SRAM S80 rear wheel hub. I dearly wish to replace its 9/10-speed freehub body with one that can accomodate Shimano 11-cog casettes. SRAM S80 was a 80mm-profile aero ...
7
votes
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 ...
6
votes
2answers
2k views

What is this nut?

I've been searching on Google for the last hour trying to figure out if this is some kind of security nut. It's on a Shimano hub on the rear wheel.
6
votes
4answers
18k views

Labour cost in building a wheel

What is the labour cost or time involved in building a wheel. I want to use a different hub with an existing wheel
6
votes
4answers
9k views

practical pro and contra for Nuvinci CVT especially for hilly terrain

I'm thinking of buying new bike next year, most probably combo for exercise & commuting in summer. Since terrain is relatively hilly here and both fixed city-bike and casual combo with 3x7 gears ...
6
votes
1answer
297 views

What is the “clip ring” part on my hubs?

I recently bought a vintage Japanese Zunow road bicycle from the 1980's. The Sunshine hubs comes with small little rusty “clip rings” on both sides. Any idea what is the purpose of those clips?
6
votes
3answers
4k views

Convert fixed gear to coaster bike

I want to convert my fixed gear 700c bike (raleigh rush hour) to coaster break bike. Can anyone recomend the best way to do this. Can anyone recomend a good coaster rear hub or coaster rear wheel?
6
votes
1answer
2k views

Why are axle cone nuts on the left side of a bike not reverse threaded?

I recently discovered that the adjustable sealed bearing cartridges on my rear hub failed prematurely because one of the "cones" (cartridge shoulder nuts) had somehow tightened itself, putting undue ...
6
votes
1answer
97 views

Non standard hub bearing?

I need to replace a hub bearing. On it, I can Read ZPL (manufacturer I guess) and 6200RS. 6200 seems to be a standard for (inner diameter x outer diameter x width) 10 x 30 x 9mm. But when I measure, I ...
6
votes
2answers
2k views

Hub grease, white grease, red grease or buy grease?

As i'm going to overhaul my hubs, i'm looking for the right grease for the job. The easy way would be going to a shop and buy some dedicated grease. But searching through my garage, I found that i ...
6
votes
3answers
362 views

Are all ready-made wheels sold “cassette compatible” only?

I will have to change my wheels on my old trusty late-80s Peugeot (PS28) soon. The rear wheel is mounted with a freewheel-type 6-speed hub (not cassette). I was wondering if all ready-made wheels ...
6
votes
2answers
463 views

Identify this hub (similar to a Sturmey Archer rear internal gear hub w/ drum brake)

I recently came across the auction of an old Gazelle city bike. It is equipped with rear internal gear hub with drum brake which looks like Sturmey Archer 3 gear hub. But this hub has two shifting ...
6
votes
2answers
130 views

Why do cones pit in hub bearings?

So called cones are the the inner races in angular contact bearings in hubs. The outer races, usually simply called races, are usually integral to the hub and cannot be replaced. Cones however are ...
5
votes
4answers
852 views

Freehub pawl system vs star ratchet system

If you were to choose between a Hope Pro 4 hub and a DT Swiss 350 or 240, purely based on their freehub types, ie Hope's pawl system or DT's ratchet system, which would you choose and why? The main ...
5
votes
5answers
4k views

Fixed gear wheel hard to spin

My wheel feels harder to spin than usual. I just put new tires on, and at first I thought a tire must be rubbing, but that's not the case. Seems like the hub might just be gunked up inside, but I'm ...
5
votes
3answers
4k views

How to properly remove bearings from shouldered-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 ...
5
votes
3answers
4k 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
4answers
274 views

Uneven friction in front hub after rebuild

I serviced my old mountain bike after 6 years of use. This included replacing balls and regreasing the hubs of the bike. When I tightened the lock nut on the front axle and checked for wobbling the ...
5
votes
1answer
367 views

Difference between grease

Is there a sensible difference between special bike grease (i.e. park tool grease) and grease used in vehicles? Is it worth (when speaking about cheap bikes) spending 10 times more money for special ...
5
votes
2answers
24k views

How to set up bike so that back-pedalling stops the rear wheel?

My first bike was a 1976 Raleigh Strika. It was brilliant and was distinguished by having only a front brake lever. To get the rear wheel to stop one simply back-pedalled. This was a v. efficient way ...
5
votes
1answer
116 views

How can I undo the locknut on this Shimano 105 hub

I'm having trouble working out how to properly service this Shimano 105 rear hub. I've watched some videos, read Leonard Zinn's book and following Park Tools' instructions, but it doesn't help. I've ...
5
votes
1answer
5k views

How do I remove the freewheel side of a flip flop hub?

I've got one of those flip flop hubs, and I need to remove the freewheel side and either service or replace it as it has started slipping really badly. What tools do I need?
5
votes
3answers
23k views

What tool is needed to remove a Shimano HG-50 freewheel?

What tool is needed to remove a Shimano HG-50 freewheel from the wheel hub? It looks like a 12mm or 13mm Allen key. Will this do it or is there some detail I have missed?
5
votes
2answers
276 views

Dynamo hub cones regulation

I have bought my first dynamo hub wheel with Shimano DH-3N72 hub. The axle of the wheel fells like if it is over-tightened a bit, it rotates with feeling of clicks. Should I loose the cones in the ...
5
votes
1answer
3k views

5 speed cassette on 8 speed hub

I just picked up a cheap wheelset to replace the wheels on a vintage bike. The old bike had a 5 speed freewheel (I think. The model printed on it is shimano-ug). The new rear hub is a shimano fh-rm30 ...

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