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  1. #1
    Senior Member
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    Hi,
    Iīd like to change my kidīs Haro Backtrail Z12 rear cog and install a 22t one instead of the original 16t. Itīs difficult to find it. It mounts a rear coaster brake hub. Any help?
    Thanks.
    Last edited by cristobal41; 08-26-05 at 04:22 AM.

  2. #2
    crotchety young dude el twe's Avatar
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    Would a SS freewheel work? Never thought of what to use before...
    Quote Originally Posted by CardiacKid View Post
    I explained that he could never pay me enough cash for the amount of work I had put into that bike and the only way to compensate me for it was to ride the hell out of it.
    IRO Angus Casati Gold Line

  3. #3
    Team Beer Cynikal's Avatar
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    I would think that changing the front chainring would be easier.
    I'm not one for fawning over bicycles, but I do believe that our bikes communicate with us, and what this bike is saying is, "You're an idiot." BikeSnobNYC

  4. #4
    troglodyte ryan_c's Avatar
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    Sounds like you have an ordinary coaster brake hub, no?
    Take the wheel off, take a small screwdriver and put it inside of that ring with a break in it, in one of the three slots (you'll see when you do it). Pop that ring off. Pull the sprocket straight off. Install a new one by doing the reverse. Getting the ring back on can be tricky, but use the same small screwdriver and torque it just right, and it will go right back on.
    It's a no-brainer once you do it.

  5. #5
    Mo' Senior SSSasky's Avatar
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    I think he wants to know where he can buy the larger cog, and no, a BMX freewheel won't work. I don't know where you'll find one. Maybe someone else does.

  6. #6
    old codger icithecat's Avatar
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    The great Sheldon explains how Shimano bmx freewheel cogs can fit on Sturmey Archer hubs with a little filing. Maybe if you popped the cog off as explained by ryan c above and took it to a store that spcialises in bmx, you might get lucky.

  7. #7
    Gone, but not forgotten Sheldon Brown's Avatar
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    Quote Originally Posted by cristobal41
    Hi,
    Iīd like to change my kidīs Haro Backtrail Z12 rear cog and install a 22t one instead of the original 16t. Itīs difficult to find it. It mounts a rear coaster brake hub. Any help?
    Thanks.
    We've got 'em up to 24 teeth. Same as Sturmey-Archer hubs use.

    See: http://harriscyclery.com/sturmey

    Sheldon "Low Gears" Brown
    Code:
    +-----------------------------------+
    |   The gains in life come slowly,  | 
    |   but the losses come suddenly.   |
    |              -- Garrison Keillor  |
    +-----------------------------------+
    [COLOR=blue][CENTER][b]Harris Cyclery, West Newton, Massachusetts[/b]
    Phone 617-244-9772, FAX 617-244-1041
    [URL= http://harriscyclery.com] http://harriscyclery.com[/URL]
    Hard-to-find parts shipped Worldwide
    [URL=http://captainbike.com]http://captainbike.com[/URL]
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    [URL=http://sheldonbrown.com]http://sheldonbrown.com[/URL] [/CENTER] [/COLOR]

  8. #8
    old codger icithecat's Avatar
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    Well cristobal41, you have your answer. There is only one man who would know that the Haro Backtrail Z12 uses Sturmey archer cog size.

  9. #9
    Senior Member
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    Hi, El:
    THanks for your answer. I do not understand what you mean. Please, explain me your suggestion. Nice place Santa Cruz.

  10. #10
    Gone, but not forgotten Sheldon Brown's Avatar
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    Sorry if I wasn't clear. We sell sprockets that will fit on your bike for $14.95, in a range of different sizes.

    They're listed near the bottom of the page i sent you to. The same sprockets fit your bike as are used on Sturmey-Archer and other internal gear hubs.

    Sheldon
    [COLOR=blue][CENTER][b]Harris Cyclery, West Newton, Massachusetts[/b]
    Phone 617-244-9772, FAX 617-244-1041
    [URL= http://harriscyclery.com] http://harriscyclery.com[/URL]
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    [URL=http://captainbike.com]http://captainbike.com[/URL]
    Useful articles about bicycles and cycling
    [URL=http://sheldonbrown.com]http://sheldonbrown.com[/URL] [/CENTER] [/COLOR]

  11. #11
    crotchety young dude el twe's Avatar
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    Quote Originally Posted by cristobal41
    Hi, El:
    THanks for your answer. I do not understand what you mean. Please, explain me your suggestion. Nice place Santa Cruz.
    No, I was wrong. I thought that a single speed BMX freewheel is basically what was used on coster brakes, but I was waaaaaay wrong. Mr. Sheldon Brown must be correct, because he is Sheldon Brown. And yes, I love Santa Cruz.
    Quote Originally Posted by CardiacKid View Post
    I explained that he could never pay me enough cash for the amount of work I had put into that bike and the only way to compensate me for it was to ride the hell out of it.
    IRO Angus Casati Gold Line

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