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6

You need a crank puller. It threads in to the crank arm, and presses on the bottom bracket spindle to pull the arms off. http://www.parktool.com/product/crank-puller-for-square-taper-cranks-ccp-22 A video here from Park Tool on using their crank puller:


6

This isn't going to be nice, because the frame doesn't have a derailleur hanger built in, or routing for the derailleur (which you'd have to hack on with clamp cable stops or something). On a normal frame, one would install either a derailleur with a built in claw (e.g. Shimano Tourney RD8153) or an adapter claw (e.g. SunRace Rear Derailleur Adaptor Claw)...


5

The Jtek bar end shifter claims to work with both Nexus and Alfine 8 speed hubs, so I don't see why other shifters wouldn't. A comment on this review of the Alfine hub backs that up: "Apparently the Shimano Nexus Inter-8 twist shifter can be used with the Alfine hub if you want to avoid endless button-pushing."


4

It is normal - cogs of 1st gear turn slower than that from 2nd and 3rd gear, so are overrun and click into hub housing. You can "silent" it a bit by opening the hub and greasing hub housing, where the cogs work.


4

User6527 is wrong there. You can not use derailleur shifters due to the different cable length that is pulled or pushed to shift to another gear. You can not use other brands' shifters either for the same reason. The shifter you mention yourselve is available in black and silver, and both with and without integrated brake lever. There is also a 'cheaper' ...


4

OK if the tire was blown off the rim then I highly suspect that is the whole story. When the tube leaks out the because tire bead has come out the tube will burst and you will see a slit. A tube outside a tire cannot take much pressure. Most likely when you went from 60 to 85 psi it was enough pressure to push the tire off the rim (bead). I have ...


4

I have tried this on 2 different Alfine 8 hubs. Been running it for a couple of years and it works great. Basically you can use the Nexus twist shift with the Alfine 8 hub and it works fine.


4

I have a Shimano Nexus 7 internally geared hub. When replacing my chain, I have a chaintool to remove the pins to shorten chains, which usually start out the length intended for a dérailleur. When the chain starts to wear, I move the wheel back a bit in the horizontal dropouts. See Sheldon Brown's entry for dropouts. I can't tell from your picture what ...


4

"Old" bikes – those from before the '80s or so – usually have horizontal dropouts that allow maybe 2 or 3 cm of fore and aft movement. That should give you enough room to tension the chain. I would think that a 5-speed bike would date from this era and be built with horizontal dropouts. If that's the case then you can probably don't need a chain tensioner, ...


4

It depends on the spacing and shape of the dropouts. As I remember, Nexus 8 is 120mm OLD spacing on the frame. That stands for "Over Locknut Distance". It's the distance between the rear dropouts. Most geared hubs are going to use either 130 or 135mm OLD. So if it's not already that wide, and it's a steel frame, it may be able to be cold set that wide, ...


4

Yes, that's fine. You won't damage the hub that way, although you might damage the cable attachments if they get caught in the chain, or lose some pieces. Single cable systems work by pulling and releasing the cable, and one gear is always "cable completely slack", just as it is when there's no cable there. Like what you did. It's just like a rear ...


4

It is possible -- you can either find a 36 spoke internal gear hub (since you have a 36 hole rim) and have the wheel re-built with the new hub and bodge on the cables for the IGH shifting. Alternatively, there are automatic shifting hubs (e.g. the SRAM Automatix) which will also have a coaster brake and no shift cables. That being said, its probably going to ...


4

Looks like the barrel adjuster has been broken off and has floated down the shift cable, so the shifter end of the cable housing is not anchored. The shifter unit should look like this You might be able to glue the inner barrel back on to the shifter body. The housing is pulled back into the shifter so the glued joint would be compressed rather than ...


3

From your photo, it looks like you're fine. The load from the hub is being taken on the anti-rotation arm that you've attached to the lateral tubes of your mixte. So the anti-rotation washer (I'm presuming you're talking about the orange washer) is not being loaded. Also, as described in the responses to your previous question, your dropout is just ...


3

If you've got the CJNX40 or CJ8S40 bracket then you'll need the piece. So yeah, order it. Frankly, if you just swapped the cog I don't understand why the cassette joint is different. But I'm assuming more happened than just the cog. Whatever the case, if the casing slot/area/thing on this bracket is bigger than the previous casing slot/area/thing then that ...


3

Put your shifter in 4th gear. Adjust the cable tension so that the yellow lines match. There really isn't more to it. Not much to do wrong. If you can then shift all the way up to 8 and down to 1, the basic installation is correct. However ... from my experience, these hubs change a little over time. Mine (Alfine 8, basically the same thing) shows slippage ...


3

Don't use degreaser on the insides of an IGH! Not! Ever! For Shimano Nexus/Alfine you are supposed to use the same oil for cleaning and lubrication. For Rohloff there is a separate cleaning oil which I think has lower viscosity than the lubrication oil. Also you replace the oil at most once a year or every 5000km, not more often. Some hubs might need ...


3

Another significant difference is that the nexus is supplied with a grip/twist shifter: And the Alfine has a trigger/pod shifter: Both shifters are intended to be used with the right hand. Also note that the IGH has variable pull amounts between gears, so you cannot substitute a linear pull shifter from a derailleur setup. Also see Installing Alfine ...


2

Choosing a grip is a matter of personal preference. If you're worried about the fact that the Nexus shifters require a smaller grip on one side than the other (due to the shifter taking up room), you can get grips that are made to mate with an internal hub shifter like the Nexus. Alternately, since these can be difficult to locate, you can cut down the ...


2

Alfine 8 and Nexus 8 can use the same shifters. I'm guessing you need to adjust the shifter by turning the barrel adjuster on the shifter (there are marks on the hub which need to be lined up in order for it to shift properly -- check the setup instructions for the hub/shifter).


2

You likely need to tighten the hub bearings. I'd take it to a shop and ask for a hub bearing adjustment. On most hubs I'd say you can do it yourself but the Nexus series are complicated and have different features depending on the model. This means most step-by-step directions for standard hubs won't apply. E.g. it may have a brake built into it. You'...


2

You had the tyres inflated to their maximum pressure and, in a comment, you say you'd left the bike outside in the summer sun. I'd say it's very likely that the tyres got hot, which increased their pressure beyond maximum and blew the tyres off the rim. As that happened, it would have exposed a gap between the tyre and the rim through which the tube would ...


2

As @Kibbee has stated the IGHs do have a different OLD, although Nexus hubs can be spaced out to 135mm with spacers/ bolts/ washers. You need to measure the Dahon's rear dropout spacing. I can't find anything to suggest otherwise so I assume it's 132mm, in line with other commuter type bikes. The limiting factor is dropout spacing. The Dahon is an ...


2

The first response above that referred to the Crib Sheet was not entirely correct. One needs to compare incremental steps from that table. According to that, the 3rd gear pull appears 1.1mm too short (5.4mm vs 6.5mm) - though the difference is really small. The total pull (14.2mm), and the first step pull are irrelevant. I gave it a try and installed this ...


2

According to Sheldon Brown's exhaustive list, the Shimano is fairly close to the two hubs that use the Torpedo shifter. Shimano wants 14.2mm of cable pull between gears 1 and 2 where the two Torpedo-compatible hubs want 14.0mm and 13.8mm, then between 2 and 3 it's 7.8mm vs 8.7mm and 7.7mm, which suggests that the tolerances on the hubs are sufficient that ...


2

After a bit of thinking I filed off cogs from the outside. So far so good, hub presents good enegagement at all gears. After few weeks it still runs good. Left is "fixed", right shown for comparison. I fixed (filed) both. Be careful to make them equal shape and that sharp border is not too thin and ortogonal to the side surface


2

I took my bicycle to a local bicycle shop. They unfortunately told me that it should jump back to it's original position, and that opening the hub is the only way to find out what is wrong. The good news is that all the nexus 7 gears can work with the same gear shifter. The nexus 7 SG7-R42 gear shifter is therefor compatible with the nexus SG7-R46.


2

Depends what roller brake model you have. Looking at the Shimano 2015-1026 component line up document you can see what components work together. (Very useful current line up web pages here, with links to PDF docs for previous years.) You presumably have a Nexus SG-C3000-7R hub. That should be paired with the BR-IM81-R, BR-C6000-R, BR-C3010-R or BR-C3000-R ...


2

To quote Peter White Cycles: The main difference between Nexus and Alfine groups is that Alfine is designed for disc brakes, and Nexus is designed for roller brakes. Alfine hubs use regular Centerlock discs. This means that you have a wide choice of discs, disc diameters and disc calipers from multiple vendors. For roller brakes, I have a feeling that ...


2

The problem is the amount of exposed inner cable - the outer should be hard against the shifter, with the (broken) barrel adjuster used for fine tuning. If you slide the outer up to the shifter you should be able to get enough at the hub end o attach it. From here you may be able to get the bike usable, but with the broken barrel adjuster you wont be able to ...


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