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Mid drive cassettte zip tie mod.

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  • Retrorockit
    commented on 's reply
    Thanks for the feedback.
    If you do the zip tie mod with the wheel off, you can easily test the breakaway force by turning the cassette backward with a rag to protect you fingers.One seems to work just fine but add more if you like.

  • Bob Anson
    replied
    Yes, works GREAT! Now i can downshift several gears to keep the motor in the correct RPM range for the hill, without fumbling with pedaling between single changes. Stopped the gear clanging that was bugging me, 100% easier on the drive train. Only installed 2 of the smallest Ty-wraps @ 180 deg (3/16X4"). Have just Waxed the chain w/PTFE to help the drive chain LAST!! Now it shifts as similar to a motorcycle as i can get it!!

    Thanks

    Leave a comment:


  • Retrorockit
    replied
    When I went to lube my chain today I noticed that the zip tie had finally broken off. So that's about 6 weeks I guess. I didn't notice it when riding home. Probably because my Low Normal derailer already allowed downshifts while not pedaling. The bike just went back to normal. Put in a bright yellow one this time. I also didn't pull it very tight. I'll see if that makes any difference. The first one was gray and hard to find on the silver hub and spokes.
    i see this thread getting 10-20 views a day, but no comments. is anyone else trying this?

    Leave a comment:


  • Retrorockit
    commented on 's reply
    I might add that the reviewer tested this offroad in Vancouver BC, and liked it. So it does seem to be suited for MTB use.

  • Retrorockit
    replied
    Here is a very expensive (and noisy) European version of this mod for pedal bikes. Complete with zip tie/ breakaway feature, and top chain guide recommendation.

    The crank set costs about as much as a BBSHD. So we get it for free.

    Leave a comment:


  • Retrorockit
    commented on 's reply
    I've got a couple hundred miles on it now. My bike wasn't typical due to a roller chain guide, and Low Normal derailer setup. But I can shift any time I want to. Even downshift a few gears when stopped (this is not the zip tie, it's the derailer). I have to drag a brake until it's fully in gear then, but it works. Pretty close to an IGH in my case.
    So have you tried it?
    Last edited by Retrorockit; 10-10-2022, 07:36 AM.

  • paxtana
    replied
    Cool idea!

    Leave a comment:


  • Cyclops
    replied
    Post was "unapproved "???
    try again.......did the mod Friday........very cool being able to shift without pedaling. Rode 20km with no issues
    Attached Files

    Leave a comment:


  • Retrorockit
    replied
    I see a post from Cyclops listed but can't find it in the thread. Maybe a repost?
    I should add that this mod doesn't FORCE you to stop pedaling when shifting. You can still shift when pedaling if you prefer that. It gives you the added OPTION of shifting when not pedaling. If you shift when pedaling you will get the same crisp/crunchy shifts you had before. If you have a shift sensor, that should still work . I took mine off before this mod for reasons listed above. So this mod is not an either/or kind of thing. If you do shift when coasting you won't need the shift sensor.
    So my comment to backpedal when shifting has more to do with my bike not having a shift sensor, than it does the zip tie mod.
    Last edited by Retrorockit; 10-08-2022, 07:48 AM.

    Leave a comment:


  • Retrorockit
    commented on 's reply
    My bike is actuallly quieter after this mod. No rear freewheel clicking when coasting. Just a whir from the chain if I go to a low gear while riding fast. My bike was already pretty quiet for an HT after the Tannus Armour upgrade. So I don't think there is a sound associated with this that wasn't already there for some other reason.

  • Retrorockit
    commented on 's reply
    I had just lubed mine before I did this mod. But everything in the front is moving now when coasting. I would look there too.

  • Retrorockit
    commented on 's reply
    Do you have the zip tie down near the hub? My XT hub had windows in the flange so I used one of those. If it's further out it can bump the chain on the next cog as it goes by. The other possibility I can think of is it may be holding the rear freewheel in a position where the pawl isn't engaged. It should be engaged all the time and driving the bike normally. I've had no sound from mine at all. Maybe zip it so it's holding the rear pawl already engaged.I have my own habit from running low normal derailers for 18 years. I down shift w/o pedaling but give a turn just before I stop to engage the preselected cog. Totally unnecessary now, it's already in gear. This is also where the motor would give a kick because the shift delay was used up when I had a sensor installed. Drive it like a stick shift car. A quick stop or tiny back stroke cuts the power, and releases the clutch. Make whatever shift you want, and pedal again. if you do this with the right foot forward it's actually the same one foot up, one down movement. if you have a shift sensor you might unplug it to see how the mod works alone.
    Maybe your front freewheel needs some grease?
    Last edited by Retrorockit; 10-03-2022, 04:53 AM.

  • 73Eldo
    replied
    I tried it today. Fairly short ride, about 12 miles. Got some new sounds. First sound is a clicking when coasting. Its worst in the lower gears so it must have to do with the wonky chain line. In higher gears I probably would not have noticed it. Once I heard it I can even hear it in the higher gears. Any driving force the noise goes away so it must have to do with the chain being pulled over the chain ring rather than the ring pulling the chain. I'm kinda curious to see if the noise changes as I get more miles on it in this configuration. For those that are curious its a Luna Eclipse narrow wide ring with about 2k miles on it and on its 2nd chain that so far isn't showing any signs of wear. Its a 10 speed middle of the range Shimano HG.

    Other noise I notice is what I assume is maybe the motor spinning down? Normally the ring is still driving and perhaps making some noise so you don't hear the motor itself still spinning? Its not bad just a different noise than I was used to. So far not really seeing a down side. Once I get used to it it will probably be handy not having to pedal to shift. Little hard to break that habit, have to remember what it was like to ride my Schwinn Varsity that was like that 40 years ago. Pretty sure that would have been the first derailleur bike I would have really ridden so maybe it won't take me long to remember that.

    Leave a comment:


  • Retrorockit
    commented on 's reply
    40 mile ride today. 30 yesterday. Bike rides great, no issues with this mod.

  • 73Eldo
    commented on 's reply
    I just suggest zip tie for every problem. Eventually its got to work on something.
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