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Is there another crank standard that would be better than ISIS?

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  • #31
    Q-Axle hubs are creaky and their bearings are very weak
    http://monocycle.info
    http://www.leblogdumonocycle.fr/
    CITY XTP 26", MUNI KH26" & KH29", ROAD Oracle 32" and KH36"
    my goal : a 3 geared 29" to have only one uni for all kind of rides :-)

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    • #32
      Originally posted by bouin-bouin View Post
      Q-Axle hubs are creaky and their bearings are very weak
      only with wrong assembly

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      • #33
        Originally posted by Langsamraser View Post
        only with wrong assembly
        I don’t agree
        http://monocycle.info
        http://www.leblogdumonocycle.fr/
        CITY XTP 26", MUNI KH26" & KH29", ROAD Oracle 32" and KH36"
        my goal : a 3 geared 29" to have only one uni for all kind of rides :-)

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        • #34
          Originally posted by Aali View Post
          Qu-ax should develop a 125 mm wide Q-axle hub with 32 holes so that I could replace my ISIS-based Hatchet wheel with a Q-Axle alternative.
          125mm, yes +1 here.
          And a 36h hub without disk brake...
          unicycle.show
          unicycle.blog
          unicycle.builders
          +1 866 UNI-CYCL

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          • #35
            Originally posted by leo View Post
            And a 36h hub without disk brake...
            like this?

            Regarding creaky q-axle hubs: I've seen them creak a bit with people that I think of as mechanically competent too. If the teeth on the hub or crank end up slightly small, there can be movement, and where there is movement, there might be some creaking. As far as I can tell, cleaning and (re-)greasing generally seems to help in almost all cases, with some riders (or sets of cranks, I'm not sure), needing to do it more often then others. What I don't like about Q-Axle is that you can't rotate the crank on the splines, which I like to do to rotate the rim. I like to think that rotating the point where you land jumps on might stop rims becoming oval shaped.

            I think the short summary is: if splines have to be able to be installed by a consumer with basic hand tools, you'll can't choose a fit that guarantees being absolutely creak free 100% of the time. If this was an industrial application, you'd choose a good tight fit and install the cranks with a press and heat. Most people don't have a press that fit's a unicycle in it at home.. Isis tries to solve that with a conus, q-axle/hollowtech with clamping, which I think is equally valid.

            With both Q-Axle and ISIS I haven't seen:
            • Catastrophic failures (of hub interfaces, some cranks still break at different points)
            • Either of them having really large scale issues. Yes, some people appear to have some issues with ISIS cranks, and some do with Q-Axle, but in both cases, it appears to be less than 1% to me.
            Which I think is pretty good to be honest, and I wouldn't shy away from either myself.
            In the beginning the Universe was created. This has made a lot of people very angry and been widely regarded as a bad move. -Douglas Adams.

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            • #36
              I think the issue on Q-axle is not the connection of crank to axle. This has been proven to work on thousands of bike connections as well.

              To my understanding it is the hub itself. As it is a 2 piece design (alu hub body, steel axle) it needs to be pressed together. Those more than one piece design hubs did creak on older ISIS hubs as well. As a result Nimbus and KH have changed to one piece steel ISIS hubs. Those hubs do not creak anymore.

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              • #37
                Originally posted by finnspin View Post
                like this?
                Yes! And like that.

                Nice. That just entered high on my wishlist.
                unicycle.show
                unicycle.blog
                unicycle.builders
                +1 866 UNI-CYCL

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                • #38
                  Originally posted by finnspin View Post
                  I like to think that rotating the point where you land jumps on might stop rims becoming oval shaped.
                  I've been wondering if it would make sense to build wheels stronger in that orientation.

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                  • #39
                    Originally posted by finnspin View Post
                    If the teeth on the hub or crank end up slightly small, there can be movement, and where there is movement, there might be some creaking. As far as I can tell, cleaning and (re-)greasing generally seems to help in almost all cases, with some riders (or sets of cranks, I'm not sure), needing to do it more often then others.
                    Zero experience with Q-Axle interface, but I rode a Profile setup from 2003-2016. It pretty much always creaked. Profile used what I believe was a 45-tooth spline, which means lots of small teeth.

                    After being reassembled, or maintenance/re-greased, it would be quiet for a while, which would be nice for 2-3 ride, but that would be it. Going up a hill (or down), you could always hear me coming. On the flats it would be a lot quieter because of less force being applied. Anyway, that may be similar to what some Q-Axle riders have experienced. Follow the advice above if yours creaks.

                    In any case, same hub and no failed cranks (I used different sizes) for 13 years with no breakage. Not even close. My old Wilder was a great Muni, cutting edge when it was new, but no ability to add a brake without major surgery, so I finally upgraded...
                    John Foss
                    www.unicycling.com

                    "Who is going to argue with a mom who can ride a unicycle?" -- Forums member "HiMo"

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                    • #40
                      Originally posted by johnfoss View Post
                      I rode a Profile setup from 2003-2016. It pretty much always creaked.
                      I wonder if you wore some slop into your crank - hub interface.

                      I'm still riding my Profile setups -- 20" trials and 24" muni -- since the early 2000s and they still don't creak.
                      "The trouble with the world is that the stupid are cocksure and the intelligent are full of doubt." - Bertrand Russell

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                      • #41
                        Originally posted by maestro8 View Post
                        I wonder if you wore some slop into your crank - hub interface.
                        That's definitely a possibility, though I will point out that all three sets of cranks I used, the original 175s, then the 160s that were still too long, followed by the 145s that I used the longest, all creaked about the same. Also the creak didn't seem to get worse.

                        Another possibility is that the hub was slightly off spec?

                        Anyway, that uni is relegated to "backup, loaner and museum" status, and with my much newer uni I have the possibility of sneaking up on people. If I can just learn to breathe a little quieter...
                        Last edited by johnfoss; 2019-08-28, 03:26 AM.
                        John Foss
                        www.unicycling.com

                        "Who is going to argue with a mom who can ride a unicycle?" -- Forums member "HiMo"

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                        • #42
                          Originally posted by johnfoss View Post
                          Anyway, that uni is relegated to "backup, loaner and museum" status, and with my much newer uni I have the possibility of sneaking up on people. If I can just learn to breathe a little quieter...
                          On my usual rides when I see peds along the path I have to pass, I will make some extra noise, as unis are much quieter than bikes. I do think my latest 24" QUAx is more noise, but I haven't found out exactly where the sound comes from. It is more of a jingle than a creak and all the bolts seem to be tightened enough.

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                          • #43
                            I carry a little bell in my pocket and ring it occasionally if there are a pedestrians blocking a cycle path.

                            I just give it a little ‘pling’ and put it back in my pocket. I think that on more than one occasion, they wonder where I have the bell.

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