An internally-geared hub is a gearing system contained within the rear-wheel hub of a bicycle. All the components are contained within the sealed hub, making them less susceptible to the elements when riding. They are generally regarded as lower maintenance than dérailleur gears. Usually they will ...

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4answers
573 views

Shifters compatible with: SG-3D55 (Shimano Nexus 3 speed - disk brake - internal gear hub)

I am planning to buy the SG-3D55 internal gear hub. According to this forum post, the SL-3S35 is compatible. But what about the other 3 speed nexus shifters? I am finding it hard to find any ...
1
vote
2answers
106 views

How do you make an end-capped gear cable?

I want to make my own gear cable of non-standard length. I have a cable with one end capped like the larger end-cap shown in the first picture; the other end is currently bare — I have trimmed the ...
1
vote
2answers
87 views

Internal Gear Hub for 16in Wheel?

My 4yr old son has a 16in Bikestar and at times he maxes out the gearing on it trying to keep up with his old man. How feasible is it to add either a 2 or 3 speed hub to such a bike? I'm concerned ...
4
votes
3answers
607 views

Shorten or replace bicycle chain?

The chain on my internally geared hub bicycle is now too long even when the rear wheel is entirely pulled back. How do I tell whether it's sufficient to shorten the chain by removing some links, or if ...
3
votes
1answer
93 views

Decoding internal gear specs

I am looking at a bike which describes the gears as: 3 speed internal geared hub, 42t front and 16t rear gearing. What does the latter spec (42t/16t) describe?
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1answer
47 views

Specific Conversion to IGH

What do I need to research to switch to an internally geared hub? Having looked at the above Q and A, I have a followup question. I have a Globe Work 2, that I'm considering converting to an IGH. ...
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0answers
54 views

orientation of non rotating washers (Nexus 8-Speed Internal Hub)

The anti-rotating washers on my Nexus 8-speed internal hub axle are opposite to what every service manual I've seen suggest they should be. In particular, the yellow washer is on the left side and ...
5
votes
2answers
395 views

Mystery grease source - Alfine 11, Gates Belt drive, Shimano bottom bracket

I have a 2012 Spot Acme and it's been great, everything is still smooth and working well into its second winter. However I picked it up to bring it into the office a week ago and noticed grease all ...
1
vote
1answer
132 views

Can I mount a wheel with a narrow hub to a wide frame?

Suppose I have a 120mm hub with a long axle, that I want to mount in a frame with 130mm dropouts. In principle, it seems to me that this should be fine, but I want to confirm this. One immediate issue ...
26
votes
7answers
6k 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, a part from being heavier, how much will I loose in performance if I use hub gear?
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1answer
113 views

Can an IGH have the same maximum overdrive-ratio as a crank-sproket setup?

Is there an IGH that gives one the maximum overdrive-ratio that one might get with a 39-53T crankset and a 11-34T freewheel? If not, what is the mechanical roadblock in making one ?
22
votes
4answers
29k views

What are the pros and cons of internal gears?

I've had my hybrid 24-speed for a bit over 3 years now, and just last weekend, when looking for a bike for my wife, discovered internal gears. Suffice to say it blew my mind when I saw 7-speed ...
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votes
3answers
1k views

Replace S-RAM S7 gear hub with something better

I have an SRAM S7 gear on my bike, and I'm not content with it. I find it more or less impossible to get the adjustment right. Supposedly I just have to leave the shifter in position 7 and then ...
2
votes
2answers
158 views

Can you rebuild a Sram gear hub?

I bought a used bike with Sram 7 gear hub and after a few weeks, the chain started falling of all the time. I took it to a bike shop and they told me that the problem is in the gear hub, that it's not ...
3
votes
1answer
216 views

Is it a good idea to switch to hub gear?

I have a Firefox Roadrunner Pro. I wanted to know if it was a good idea to install an internal hub gear on it. I want to install it to reduce dust accumulation and oiling and to simplify the ...
12
votes
5answers
2k views

How many miles and/or commuting seasons will a modern internal geared hub last?

I've been considering drive trains on a utility / commuter bike. What are expected or actual lifetime / maintenance needs of modern internal hubs? The Shimano Alfine internal 8-speed hub is on ...
1
vote
0answers
113 views

Sliding chain back on hub gear bikes

I got a folding bike 2 months ago and got my first hiccup. It has a 3-speed hub gear and while changing gears today, it seems like the chain slipped off the smaller chainring near the back wheel into ...
1
vote
1answer
280 views

How much “play” is normal in a Sturmey Archer 3 speed hub?

I inherited a bike with a Sturmey Archer 3 speed hub (Sturmey Archer AW, from 1984). I am very familiar with free-wheels and cassete hubs, but this is fairly new to me, although I did some research ...
4
votes
2answers
249 views

Internal gear hub maintenance

I have a Muji utility bicycle with a 3-speed internal gear hub which I got second hand around 5 years ago. The LBS which I bought the bike from has since closed down and I haven't managed to find ...
2
votes
2answers
80 views

Using a series of hub gears

I have an idea and I'm wondering if it's feasible. For an upcoming recumbent cargo touring build, I wonder if I could say use an 8-speed hub gear connected directly to an identical 8-speed hub gear, ...
0
votes
1answer
170 views

Alfine 11 chain guard

I'm planning to invest into a Alfine 11 set (both hub gear and crank+front cog(45)). I'm also looking for solution for chain guard for Alfine cog for commuting. I've found Curana brand that makes good ...
3
votes
4answers
2k views

Bottom bracket with built-in internal hub - does this exist?

I've heard that one can install a bottom bracket that has what is essentially a built-in internal hub, giving one the ability to add a virtual double chainring where there's only one. This would be ...
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votes
0answers
56 views

Oil or grease for IGH in cold climates?

I live in a place with fairly cold winters. I took my bike to the LBS the other day to get a little help thawing out and relubing a cold-stuck brake cable. (It had rained the day before; I really ...
3
votes
3answers
2k views

How to replace a Sturmey Archer's cable?

I would like to replace the cable of a Sturmey Archer hub, but can't find a way to disassemble the old cable without destroying it, and it puzzles me how to insert the new cable. To better explain, I ...
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vote
1answer
104 views

What advise for using spacers on MTB rear forkend

I have a Cannondale MTB frame I'd like to make a cruzer by adding a Sturmey Archer 2-speed kick shift. The SA axel length is 162mm and the spacing is 116mm but the Cannondale spacing is 135mm ...
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vote
1answer
310 views

Grip for Shimano Nexus hub gear shifter

Would you recommend for a good grip from Shimano Nexus shifter? I hardly find a good option. Ergon grips seem to be the best choice.
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vote
1answer
106 views

Any special issues with putting a larger internal gear hub on a smaller frame?

Can I safely put my 130mm internal geared hub on a 126mm spaced aluminum frame by forcing it? What are the consequences? How would the IGH be "damaged" by this? My IGH hub has a wheel laced and ...
3
votes
1answer
285 views

Fixing/replacing rim/wheel with Internal Gear Hubs (Nexus 3)

My rear wheel's rim is severely damaged and I want to replace the rim. I don't want to respoke it, so first question, is it possible to buy new prebuilt wheel somehow without the transmission itself, ...
6
votes
2answers
1k views

Can oil/grease damage tires?

I've noticed a small puddle of light oil beneath the rear wheel of our Rohloff-equipped tandem. I'm told that a small amount of leakage is normal and I'm not worried about that. The issue is that a ...
3
votes
1answer
644 views

Rear internal hub won't shift gears

I have a 1963 Sears cruiser, three speed, which I bought very recently. On my third ride, the middle speed stopped working, and went loose; there wasn't any "traction" when I pedaled. It happened as I ...
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vote
1answer
337 views

dishing on alfine hub

I am building a wheel with an Alfine 8 speed hub which has space for a disk brake. I am measuring the dishing by supporting the rim and measuring the distance from the table to the end of the through ...
3
votes
2answers
2k views

How is the riding experience of a Rohloff hub different than derailleur gears?

I'm considering a Rohloff hub and am wondering what the day-to-day riding experience would be like compared to my existing derailleur setup. There are some obvious things (e.g. don't have to be moving ...
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vote
1answer
3k views

Sachs Torpedo 3 gear vs. SRAM T3 vs. SRAM i-motion 3 gear

Various webshops use the following names: Sachs Torpedo 3 gear SRAM T3 SRAM i-motion 3 gear There are many inconsistencies in what exactly they call them, and for a long time I thought it was ...
2
votes
1answer
202 views

Thinking of getting a new chainset

I've decided to get a new chainset as my current 38T Nexus is giving low speeds with my Alfine 8 speed hub. I have my eye on the 45T Shimano Alfine chainset. Currently I have a square taper bottom ...
2
votes
3answers
6k views

Alfine 11-speed - what is needed to install it? What are common problems when installing?

This is an expensive and heavy hub but I'm looking to build a new wheel and strip the rear derailleur off my old Trek MTB. It already has a fixed Ritchey carbon fork and front disc and is a nice ...
3
votes
2answers
4k views

Advice for servicing a Scott Sub 10 [8 speed Alfine hub gear]

I purchased a Scott Sub 10 last year and use it almost every day for commuting doing around 12 miles a day. I'd say I've done around 2000 miles since purchasing it last Summer. I am going to take ...
4
votes
2answers
396 views

How do I tell if my cog needs replacing?

Two answers to this question gather that after 14335 km (8907 mi) of cycling with a single chain, the cog is at risk of being damaged. I haven't noticed anything unusual apart from the chain being ...
6
votes
3answers
3k views

Apart from the size, is there any difference between chains for derailleurs or for single-speed / internally geared hubs?

I might need to replace my bicycle chain (see this question). The store where I've bought components before (cyclecomponents.com) seems to be entirely marketed to derailleurs, and I have an internally ...
0
votes
3answers
242 views

Replacing the Trek Lime

I purchased a Trek Lime for my mother a few years ago. Unfortunately, it has now been stolen and I need to replace it. She has terrible arthritis so any bike that would require her hands to do more ...
1
vote
1answer
647 views

Shimano Nexus 3 clicking free-wheel-mechanism-like noise

I have assembled a bike with new Shimano Nexus 3 (SG-3C41) internally geared hub. In the lowest gear the hub is silent. However in the middle and highest gear it makes a clicking noise similar to ...
2
votes
1answer
354 views

What is this point of this Phil Wood “Rohloff Disc Rotor Compatible Hub”?

http://www.philwood.com/products/hubspgs/rohldisc.php As far as I can figure it is for people with Rohloff-equipped touring bikes so that they have the same rotor bolt pattern on their front and rear ...
6
votes
5answers
2k views

Why not have the gears inside the bottom bracket?

Looking into an IGH it seems the biggest disadvantage is having a huge amount of rotating mass. I've seen one handmade bike where the IGH sits above the bracket, inside a carbon fibre shroud around ...
6
votes
4answers
586 views

Comparing gear ratios on different bike types

How can I compare gear ratios on different wheel sizes? How can I compare gear ratios on MTB with tracking bikes with bigger wheels? How can I compare gear ratios with gear hubs?
5
votes
1answer
389 views

Nexus hub keeps getting misaligned

I have a nexus 8-speed internal hub on a Civia Kingfield bike. It keeps getting misaligned -- the dots on the bottom don't line up. In the past I have successfully adjusted it using the barrel ...
16
votes
1answer
968 views

Relative efficiency of different commute bike setups

My interest is in long distance commuting (e.g. more than 50 km a day) and the relative efficiencies of different commute bike setups (e.g. drop bars vs flat bars, fenders vs no fenders, panniers vs ...
4
votes
2answers
3k views

Do Shimano Nexus hubs lose efficiency as they get older?

I ride a 5 year old commuter bike with a Shimano Nexus 8 internal hub gear, that's done about 20,000km. I'm not sure if I'm imagining it, but it seems like my bike has lost a considerable amount of ...
2
votes
2answers
569 views

Rohloff clicking sound with ratchety feeling

Recently, my Rohloff-geared bicycle started to make a regular clicking sound with a ratchety feeling associated with it. Besides a click, I feel a small resistance transmitted through the pedals. This ...
3
votes
2answers
3k views

What do I need to research to switch to an internally geared hub?

I have a bike that I rather like, but it's geared entirely for high-speed road bike type work. It's fantastic on the flat areas of the route that I take every day, but I also have a couple of serious ...
3
votes
1answer
369 views

Source an internal/hub derailleur for Bianchi Bergamo

Is this really such a novel piece of equipment? 2006 Bianchi Bergamo internal/hub derailleur I commute with a lot of weight on the rack and pop spokes in my rear wheel at least a couple of times a ...
3
votes
2answers
593 views

Make a 3-gear bike go easy on uphill

I want to see how can I make this 3-gear bike go easier on uphill. It has an internal gear hub. I don't know much about bikes but I'm thinking if I can merely replace the hub for one with 14 gears ...