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27

Early cassettes (Suntour Accushift and Shimano Uniglide being some commonly encountered examples) weren't like this. The splines were all the same and there was no hunting for the little spline or big gap. To summarize a bunch of history, these cassettes were current at the same time as early indexed shifting. Accushift and early Shimano SIS both ...


20

Hope hubs are a very refined, reliable execution of the pawl design. They don't do much to illustrate the disadvantages of the concept that designs like the star ratchet are trying to address. One potential downfall of pawl systems like Hope uses is that when things go wrong with them, either the pawls or the part inside the hub shell that the pawls engage, ...


18

This sounds like a issue in your freehub/freewheel (both are mechanically the same for this question). This is what allows you to coast without pedaling. Inside these bodies are a set of "pawls" which will flip down and engage a series of splines when rotated "forward", and propels the bike forward. Then, if you move them in the other direction "backwards"...


15

Standard Pawl and Ratchet Design This design is by far the most common on bicycle freehubs, and as such the least expensive to employ. Mechanism In it's simplest form, this design consists of a surface that is toothed and a pawl (which is a lever that engages the toothed surface and only allows movement in one direction). In a bicycle this design is ...


11

American Classic Cam Plate Design The full name is "Six Pawl Cam Actuated Engagement System." This design is one of the more complicated ones, but according to American Classic provides a stronger freehub with relatively low resistance and causes all 6 double tooth pawls to engage simultaneously with high precision. Mechanism There are several ...


9

Yes, there is. Shimano/SRAM & compatible seven speed is 5mm cog-to-cog, and eight is 4.8mm. Generally what you're trying to do here can't be made to work very well. There are some tricks that without any additional parts can increase the movement of the derailer, but not decrease it. Also if you have a true 7-speed-only chain (not common anymore but they ...


9

Use strong cable ties or wire/cable to tie the biggest sprocket to the rear wheel spokes. This will eliminate the freewheel, so be very careful when slowing down or going downhill. If cable ties are too weak, shifting or brake cables should work nicely. If you don’t have any spares you could even scavenge the front derailleur shift cable. However, I think ...


9

There are two kinds of common 11-speed Shimano hyperglide cassettes. The first type of cassettes, "MTB", has a big sprocket that is large. The big sprocket is shaped so that it overhangs the right hub flange, which is only possible because the sprocket is large. You can use this type of cassette directly on Shimano 8-10 speed "road" hubs ...


8

Most likely duplicate but I cannot find it. In the free hub / free wheel you have pawls that are the coast / drive mechanism. Most likely they are gooked up or just plain broken. Some are serviceable and some are not. FREEHUB SERVICE You can also search on youtube. Or just take the wheel to a bike shop. You might be able to free it up with a bit of ...


8

I don't have specific experience with this one, but the pictures suggest it works one of two ways: From where you're at now, you bonk the end of the axle on the non-drive sufficiently hard and the axle slides out, possibly taking the freehub with it, or if not then letting it be removed. You put the 5mm allen in the drive side end and a cone wrench on the ...


8

Star Ratchet and variations This design in it's simplest form is used by DT Swiss. This design incorporates easily replaceable ratchet plates that offer the added benefit of every engagement point transferring torque. A more complicated variation is what is used in Chris King hubs. Mechanism - DT Swiss 1. end piece 2. bearing 3. thread ring 4. axle 5. ...


7

Sprag Clutch The sprag clutch has existed in industrial applications for some time: being used in motorcycles, helicopters, airplanes, automotive transmissions, and others. As far as I know, Onyx is the only company to bring it to bicycle hubs. Sprag clutches offer low rolling resistance and virtually instantaneous engagement. They are also reliable and ...


7

If everything is shifting smoothly and the hanger is aligned, it's very likely the freehub body slipping intermittently, which feels much like the chain slipping. Usually it takes a visual to be sure it's the freehub and not the chain. Different freehub designs call for different procedures to fix and investigate this. The root cause could either be overly ...


7

I believe this one is a 12mm allen inserted through the non-drive side. 11mm is out there too. Usually what I do is clamp an L-type one in a vise, long end up. A long socket would also work but it would need to be very long.


7

Simple answer: yes, but it’s not worth doing. Cost of hub, spokes, nipples and having wheel rebuilt will exceed the cost of a new wheel. Even if you re-use the spokes a new wheel will still be cheaper. Wheel building requires special equipment, expertise and time to do correctly.


7

Yes - I have personally done this, by installing an 8 speed cassette freehub into a wheel that had a 6 speed freewheel. The donor was a 26" MTB wheel, and the recipient was a 20" wheel for my folding bike It was only worth doing because I had a donor wheel and I was able to reuse the 20" spokes well enough. I even reused the 8 speed cassette and chain. ...


7

Do any other manufacturers use internal ratchets in their freehubs? Many other companies manufacture freehubs with internal ratchets, both clones that are Shimano compatible and variations of their own. Specific branded examples include the Giant FH06 freehub or the Bontrager Select freehub, but like most hubs and freehubs these are likely OEM and sourced ...


7

Sounds like the easy solution is going to be get an extra long lockring. Wheels Mfg and another company I can't remember both used to offer them. I believe current Chris King ones are longer than average but I couldn't come up with a number. Double check your wheel dish is right, because if it happened to be way over to the right, it could cause or ...


7

SRAM's XD and XDR drivers (their term) don't have splines, unlike Shimano and Campagnolo freehub bodies. Instead, their cassettes screw onto the threaded section of the driver as shown in the image below. They did this to Address the shortcomings of Shimano's Hyperglide (HG) freehub, namely that the small splines got chewed up Because they wanted to ...


7

The phrase missing here is 'Freehub body'. The freehub replaced the freewheel, mostly, which integrated the sprockets and the ratcheting mechanism. The freehub body is therefore the ratcheting mechanism which goes into the rear hub, and then the cassette fits onto the splines. The Hyperglide system is a marketing term. Related terms used by Shimano include ...


6

That's a freehub body. Look on the hub for the model of hub you have, and then you can use that to find the appropriate freehub body model by looking at the documentation of the hub.


6

There are no thru axle FH-6800 or WH-6800 versions. The next/new Ultegra will have some, but as of now I don't think think any thru axle hubs or wheels that say Ultegra on them are really out in the wild at all. This bikes uses the SCS dropout/hub/axle system. Long story short, in the past couple years it was unclear what road thru axle standard was going ...


6

It looks like a Helicomatic. Once you know the name, there is plenty of information on the Internet.


6

Inside, where the axle goes through, it is like a 12-point socket. A 11 mm or a 7/16" hex key (Allen wrench) will fit. You can also use a 3/8" square drive like for a socket wrench. I used the latter. The threads are right-handed. You can work from either side. Drive side counterclockwise. Non-drive clockwise (driving it away from you takes the ...


6

For maintenance and reliability, you can probably rank them in approximate order of the White freewheels being best at everything, then the premium singlespeed cassette hubs (King, Profile), then after that I'd put the nicer BMX freewheels, then the nicer generic-brand singlespeed cassette hubs (Novatec), then the junkier singlespeed cassette hubs, then the ...


6

As the others have already stated: Yes, it is possible, but ... However, I feel that the really important message has not been transported yet: Building a wheel is not easy for the uninitiated. Yes, it can be done. Yes, you will likely get something that looks like a true wheel. But you may easily end up with many broken spokes the weeks after. The ...


6

I think in this situation, to avoid an "upgrade spiral", you will be better off changing your chainrings. Chainrings are not overly expensive and probably won't require new derailleurs or shifters. I have been known to take apart freewheels and change the cogs. I've even re-spaced them or changed the numbers of speeds. But if you want an overall ...


6

You just noticed that quick release tightness affects the bearing preload. If your hub has cup and cone bearings, you can adjust the bearing preload so that you are able to tighten the QR skewer to maximum tightness without the bearings being too tight. This is one of the advantages of cup and cone bearings and part of the reason why cup and cone bearings ...


6

You should normally be able to install the quick release with adequate force to hold the wheel, with a freely spinning hub. Tightening the quick release does have a small effect on the hubs but yours is seemingly exaggerated, and you have a noticeable creaky noise which presumably you didn't have before. I think you therefore have an issue inside the hub to ...


6

You usually can't remove the freehub body on most hubs by hand, as is probably obvious. However, on at least some hubs, the freehub body does slide right off. Mountain Bike Rider mentions this about DT Swiss star ratchet hubs in general, and I am able to do this on a DT Swiss 370 hub (a lower-end hub with pawls). Consider that while you are riding, the hub ...


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