Here's yet another question for the expierinced MBers

Discussion in 'General Questions' started by Carl Walichnowski, Jun 21, 2017.

  1. Carl Walichnowski

    Carl Walichnowski Member

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    Below are some photos of a Mongoose Mac frame & it's chain clearance issues. I believe I'll need a top hat adapter to make this bike work but I'd love to avoid it. Does anyone have any suggestions I can try and if not at least tell me a link where these adapters can be found for a good price?
     

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  2. Carl Walichnowski

    Carl Walichnowski Member

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    Oh I forgot to mention, I seen a kit installed on this exact frame without that adapter so I'm sure it could be done it's just beyond my experience level to make it work.
     
  3. Frankenstein

    Frankenstein Well-Known Member

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    All I can interpret is that the left side chain is too close to the chainstay, are you using a sprocket with the "dish" or the toothed edge that's offset from the rest of the sprocket? I used one on the Nel lusso and had to install it with the sprocket "dished" inward, with the chain closer to the wheel than not for proper alignment and to clear a chainstay.
     
  4. gary55

    gary55 Well-Known Member

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    You could try gaining enough room with washers between the chain stay and the hub. Scratch that. On second look the top hat seems to be the answer. Then you could have a rear disc brake too. It's a win win.
     
  5. Frankenstein

    Frankenstein Well-Known Member

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    Even personally if I felt that I could get away with it to remove a bit of the hub right at the bolt on point.... As long as I thought I could get enough anchorage with the bolts.

    Gary has a good point though, you could maximize the potential for the bike by having both front and rear disk brakes with a direct drive, would probably be a nice riding experience knowing stopping is going to be reliable.
     
  6. KenM

    KenM Member

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    I had the same trouble , I just put some washers in to widen the chain stays .
    Has worked good for over a year and a half now. Hope this helps! Ken.
    Keep looking up!
     
  7. Carl Walichnowski

    Carl Walichnowski Member

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    Ok so my plan is to use the washers until I buy a top hat. Back disc brakes aren't hugely important cause I just installed the caliper brakes on the back and I have disc brakes on the front. Now if you notice where my nut is at the hub there's barely any threads left, will the washers still fit on there you think? I know the washers would go between the hub and chain stay therefore widening the chainstay and allowing my chain to clear but if I put the washers on would that also push out that bolt? It's securely on there now but if you look close there's only around 2-3 threads left to play with???
     
    Last edited: Jun 21, 2017
  8. gary55

    gary55 Well-Known Member

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    Like I said I don't think the washer fix will work for you. Not so much due to the shortage of threads though that is a serious issue, but because of the type of drop outs you have won't allow you to align the rear hub to a location that will allow proper chain alignment of the rear sprocket to the engine sprocket.
    If you look down the face of the rear sprocket I believe it will be lining up at or near outside of the engine. Since your axle has to be in a set place the only simple way you can correct this is to move the rear sprocket inward via a top hat. That is what I'm getting from your pics. The sprocket has to set inboard of the face of the rotor mount.
     
  9. Carl Walichnowski

    Carl Walichnowski Member

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    Ok I hope to get back riding soon and then switch out for the top hat when it arrives. Problem is I can't find a retailer that has them. Maybe I'm using the wrong search terms. Do you have a link or a store that sells them?
     
  10. gary55

    gary55 Well-Known Member

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    I honestly don't think you will be able to get the chain to align well enough to stay on. If it comes off to the inside (which it will) It could really screw up that nice looking mag. wheel.
    Custom motored bikes has adapters, and I'm sure a bunch of others do as well. Bicycle designer.com has them. The only ones I have used are ones I made myself so I can't say who is best. You should be patient on this. Their is a guy on here goes by fury on the inside. If you can catch him hit him up on this. Chances are he has already looked at the available options, and he knows a shitload about bikes.
     
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  11. Carl Walichnowski

    Carl Walichnowski Member

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    I'll be patient and wait on the part. I'll do some looking around to see who has the part for a good price and ordear it tonight.
     
  12. Carl Walichnowski

    Carl Walichnowski Member

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    Is this the part?? I've looked at 5 sites and still can't find it, I haven't found anything matching that picture.
     

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  13. Frankenstein

    Frankenstein Well-Known Member

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    Looks about right, it's basically identical to the top hat as far as function goes. Hopefully it all fits.
     
  14. Frankenstein

    Frankenstein Well-Known Member

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    On second thought, get the harmony adapter without the threaded secret adapter if you can. The secret adapter is this thread on thing that you don't need unless you have a left hand threaded wheel.
     
  15. Carl Walichnowski

    Carl Walichnowski Member

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    So this isn't the top hat but functions like one?? I'm trying to find the actual tophat cause it'll most likely be a lot cheaper, any suggestions?
     
  16. Carl Walichnowski

    Carl Walichnowski Member

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    Where can I find what I need for the lowest price? Can you help me out with this please?
     
  17. Frankenstein

    Frankenstein Well-Known Member

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  18. Frankenstein

    Frankenstein Well-Known Member

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    Completely coincidence I gave the exact information you wanted 10 seconds after you asked but starting giving before you asked in the first place.
     
  19. gary55

    gary55 Well-Known Member

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    That's Kurt Vonnegut sh*t.
     
  20. Street Ryderz

    Street Ryderz Well-Known Member

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