Building my first bike

Discussion in 'General Questions' started by Brandon504, Jun 26, 2015.

  1. Brandon504

    Brandon504 New Member

    I'm building a huffy bike I'm having problems with chain rubbing the tire. Anybody had this problem?
     

  2. The_Aleman

    The_Aleman Active Member

    It's a common problem on bikes with short wheelbases and/or fat tires. Possible fixes are:

    1) Run a narrower tire and/or chain.
    2) Flip or offset the rear sprocket to gain clearance.
    3) Buy a hub adapter that allows for more clearance.
    4) Buy a rear wheel with disc brake hub and bolt sprocket to that.
    5) Use a bike frame with longer wheelbase.
     
  3. Brandon504

    Brandon504 New Member

    I plan on putting the 1.75 tire on tomorrow. I have 2.125 now and I have to make a bracket for the coaster brake.
     
  4. dougsr.874

    dougsr.874 Active Member

    Chances are you have the rear sprocket on backwards
     
  5. crassius

    crassius Well-Known Member

    as a general starting point, thin tire = sprocket dished in, thick tire = sprocket dished out
     
  6. Brandon504

    Brandon504 New Member

    Thanks I noticed the dish sprocket I will have to check which way it is facing bc I do have the bigger tire.
     
  7. KCvale

    KCvale Motorized Bicycle Vendor

    You dish the sprocket to match up straight with the sprocket on your engine once it is securely mounted.

    That means when you hold your top bar with one hand, and push your cylinder head back and forth as hard as you can with your other hand, the engine doesn't move AT ALL.

    Dished out is usually best for beach cruisers but that's it, you can't bend chain around tires or fenders ;-}
     
  8. Brandon504

    Brandon504 New Member

    Will check when I get home thanks for the advice
     
  9. Brandon504

    Brandon504 New Member

    So I flipped the sprocket around. Still not enough clearance and the coaster brake isn't fitting.
     
  10. crassius

    crassius Well-Known Member

    sometimes, one needs to enlarge the hole in the sprocket with a round file to clear the dust cap of the brake AND put a slight bend in the brake arm to clear the bolt heads of the rag joint
     
  11. KCvale

    KCvale Motorized Bicycle Vendor

    Ya, it's a $95 Huffy Cranbrook right?
    Just do a Forum Search on Cranbrook, you picked about the worst bike to motorize.

    Get your advice for how to 'make it go' as many have from the myriad of previous posts about it please as years of advising people not to start with $100 bikes is everywhere to try to keep people like from being where you are now.
     
  12. dougsr.874

    dougsr.874 Active Member

    No offense to KC but I know of dozens of builds using the Cranbrook ...all successfull.....the brake arm has to be bent to clear the sprocket bolts..
     
  13. The_Aleman

    The_Aleman Active Member

    Successful is relative. The Cranbroke's frame is generic even by Huffy standards - prone to cracking - and the components are junk.

    I wouldn't trust them as a daily pedal bike. For the same or less money one could have gotten a good used non-Walmart bicycle.

    Of course, can't fault a guy for using a cheap junk engine on a cheap junk bicycle if it gets him in the MaB door.

    That's the only way some people will learn from their mistakes.
     
  14. my buddy just bent the coaster brake arm to fit, as for the rear wheel on his cranbrook his chain very lightly rubs but not serious enough to hurt anything , his solution was to put his rear wheel at a slight angle... i dont agree but hey its his bike
     
  15. dougsr.874

    dougsr.874 Active Member

    Is the rear sprocket dished in or dished out....makes a difference with chain clearance...
     
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