Building my first bike

[Brandon504]

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

 

[The_Aleman]

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.

 

[Brandon504]

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.

 

[dougsr.874]

Chances are you have the rear sprocket on backwards

 

[crassius]

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

 

[Brandon504]

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

 

[KCvale]

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 ;-}

 

[Brandon504]

Will check when I get home thanks for the advice

 

[Brandon504]

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

 

[crassius]

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