38 votes
Accepted

How am I able to simulate gears on my single speed?

You do not have a single-speed. The rear wheel on your bike has a 7-speed internally geared hub. This uses a couple of sets of planetary gears, each of which can be engaged in two different ways, plus ...
Adam Rice's user avatar
  • 29.7k
33 votes
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What's the verdict on hub-less circle bicycle wheels? Sturdy and "maintenance-free"?

Verdict seems to be 'this is a scam' Cyclotron is a scam https://cyclotronscam.boards.net/board/1/general-discussion Reevo is suspiciously similar https://www.reddit.com/r/shittykickstarters/comments/...
thelawnet's user avatar
  • 4,210
21 votes

What's the verdict on hub-less circle bicycle wheels? Sturdy and "maintenance-free"?

I would think about these in terms of bearings: The hubless design moves the bearing of the wheel all the way out to its circumference. As such, you get extremely long racetracks a need for many ...
cmaster - reinstate monica's user avatar
19 votes

How am I able to simulate gears on my single speed?

This is not a single-speed bike. It's an internally-geared hub made by Sachs, later bought by SRAM, which later stopped production of the hubs. If you take a better photo of the label on the hub, we ...
Erlkoenig's user avatar
  • 1,771
15 votes
Accepted

Are internally-geared hubs UCI legal?

Here are the UCI's rules governing bikes (jump way down to 1.3). After a quick perusal, they seem to be silent on the subject of internally geared hubs or multi-gear mechanisms in general, which is ...
Adam Rice's user avatar
  • 29.7k
12 votes

Can my belt drive frame be converted to a derailleur setup?

There is no good way. One could imagine ways of contriving a low-end claw-type derailleur on. Don't do that. Nexus hubs are usually reliable. In some places in the world, there are lot running around ...
Nathan Knutson's user avatar
11 votes
Accepted

Why haven't Shimano or SRAM internal hubs had as many gears (or as much range) as Rohloff?

There are a couple of likely reasons IMO. First, Shimano don't make anything like a Rolhoff and that's intentional. Shimano market strategy is all about mass sales to bike manufacturers, and ...
Móż's user avatar
  • 23.5k
11 votes
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Have they ever made a bicycle with in-hub gears both at the crank and wheel?

Its unnecessary from a gearing range perspective and adds extra complexity, I suppose. Number of gears, number of distinct gears and gear range are all different things. Having 63 gears over the same ...
Batman's user avatar
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11 votes
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Feasibility of coupling internal hub gear and derailleur

Given that most contemporary internal gear hubs are designed to take up the entire width of a normal rear hub (135mm), there isn't space to add a rear derailleur cassette unless you have an abnormally ...
RoboKaren's user avatar
  • 29.2k
11 votes

How am I able to simulate gears on my single speed?

As other answerers have said, that bike has hub gears rather than being a single speed bike. However, no-one so far has commented on what the differences with this style of gears are. Compared to ...
Jack Aidley's user avatar
10 votes

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

Pure anecdata from my experiences. The Rohloff is substantially cheaper as well as more reliable. I don't know how long a Rohloff lasts because I haven't worn the first one out yet. Three Nexus 8 ...
Móż's user avatar
  • 23.5k
10 votes
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Two ill-repair bikes into one?

It is probably possible. It is the kind of thing where going through it as a beginner is likely going to take a long time and present some unexpected hurdles. It would be a good thing to do for ...
Nathan Knutson's user avatar
9 votes

How am I able to simulate gears on my single speed?

Ah, but this is not a single speed bike. The gears are within the hub and invisible to the naked eye. If you remove the cable, the hub will default to (probably) the highest/heaviest/hardest gear. If ...
Noise's user avatar
  • 13.9k
8 votes

Parking a 3-speed internal hub in 2nd gear permanently

In the 45 minutes since I posted this question, I have developed an elegant workaround using a simple device: I stuck a pebble in the bellcrank. Most folks here probably won't be surprised by this ...
hairboat's user avatar
  • 562
7 votes
Accepted

Removing a rear wheel of a town bike

This picture shows a slightly better angle. You need to first loosen the lock nut slightly, then spin the adjuster barrel until it unscrews right off the threaded rod on the chain. When you re-...
Móż's user avatar
  • 23.5k
7 votes
Accepted

Half speed internal hub gear?

The closest to that is the Sachs DD3 "dual drive" hubs that are a 3 speed IGH with a standard cassette mount, available in 8,9 or 10 speed cassette versions. According to this site the ratios in the ...
Móż's user avatar
  • 23.5k
7 votes

Why haven't Shimano or SRAM internal hubs had as many gears (or as much range) as Rohloff?

Making an internally geared hub with 14 speeds that is reliable is prohibitively expensive. A Rohloff hub alone costs than most people's bicycle. It is a hard sell to most people except for a few, ...
Rider_X's user avatar
  • 30.6k
7 votes

Internally-geared hub and chain case: running away from maintenance chores and grit damage

This borders on an overly opinion-based question. It's also worth pointing out that while there are a lot of bikes with real chaincases in the world, they are pretty far outside of many people's ...
Nathan Knutson's user avatar
7 votes
Accepted

What kind of chain to buy for internal gears?

The chain you need is 1/8 inch chain, usually sold as singlespeed chain. A derailleur chain, which are sold as multi-speed chains, is narrower and the cogs may be too thick to fit. EDIT: As said in ...
ojs's user avatar
  • 22k
7 votes
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Alternative to tuning automatic hub?

Unwinding the spring, as the article states, will make the hub to shift when you're going faster. Without touching the internals, the hub will shift at the same speed, no matter how high the cadence ...
krzyski's user avatar
  • 2,711
7 votes
Accepted

Dropouts too short for internally geared hub

The black spacer in the right and left dropout should be removable. If you remove the spacer (it is usually a press fit) you will have plenty of room in the dropout slot. The spacer is a nice to have ...
David D's user avatar
  • 21.1k
7 votes
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Why does Shimano Nexus 3 internal gear feel differnt on 2nd gear with and without the pin and gear set up

There is a difference between the direct gear, and the default gear: The direct gear is the one that basically locks the hub's body to the sprocket. The internal gear ratio is exactly 1, and ...
cmaster - reinstate monica's user avatar
7 votes

Two ill-repair bikes into one?

Be careful before putting money into new parts on bikes in this condition, the risk is throwing good money after bad. If you go ahead, get a bike into as rideable state as possible before investing in ...
mattnz's user avatar
  • 49.8k
7 votes

How do you mod an internally geared hub to permanently run in one gear?

If you really wanted to, or if you were forced to do so because of a broken shifter or hub, you could do it by taking the cable and removing it from the shifter, then running it directly into wherever ...
Nathan Knutson's user avatar
7 votes
Accepted

CNC'ing Strong Hub Shell (Kindernay Swap Cage)

The spoke holes don't absolutely need to be beveled, but it's a good idea. If the head isn't sitting in a bevel, it's essentially going to either wear itself into one or the same effect will need to ...
Nathan Knutson's user avatar
6 votes

Chain coming off with internal hub gear bike - why?

In short: If chain comes off with horizontal drops (typical internal gear or single speed) the wheel has to be too far ahead. Try pulling wheel backwards until the chain can be moved <5 mm and ...
mkpaa's user avatar
  • 788
6 votes
Accepted

Can a belt driven bike be used in a hilly area?

Yes, the gearing should be fine. from http://www.sheldonbrown.com/nexus8.shtml the lowest ratio is 0.57 which is as low as many mountain bikes. The belt is actually wider than a metal chain and has ...
Kim Ryan's user avatar
  • 768
6 votes

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

A couple of months ago I did this exact overhaul and it has been running super smooth ever since. Can't comment on the longevity yet but here is the logic: Bearings: standard bearing grease, oil is ...
Toby's user avatar
  • 344
6 votes
Accepted

increase highest upper ratio with gear hub

Decreasing the rear cog is by far the easiest of your options. On road bikes, chain rings of 34-39 teeth and rear cogs of 11 are common, so you would be within range. The force on the chain is higher ...
Ross Millikan's user avatar
6 votes

Help me understand my Hub Gear bicycle

In order to understand how your gears work, it's probably useful to do a little experimenting own your own. Since you have a hub gear, switching between gears is very easy. Just move the lever while ...
Kibbee's user avatar
  • 21.7k

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