Freewheel Sprockets

Discussion in 'Spare Parts, Tools & Product Developement' started by jerrysim, Sep 21, 2009.

  1. jerrysim

    jerrysim New Member

    I would like some information on freewheel sprockets. on my titan setup when I am coasting downhill I feel a drag when I am going faster than the speed of the current setup. if I had a freewheeled sprocket I am pretty sure I wouldnt get that drag. Who makes them and any other feedback appreciated.
     
    Last edited: Sep 21, 2009

  2. loquin

    loquin Active Member

    A freewheel sprocket turns freely in one direction, but, not in the other. It has a racheting action

    The preferred place to put the freewheel is at the rear axle, but, when the sprocket is on the left side of the axle (when facing forwards) the freewheel must thread onto the axle using left-hand threads, so that the action of the motor/chain pulling on it tighten the freewheel. The other issue is that the left-hand thread freewheels that are available are of 'iffy' quality, and BMX sprocket sizes are very limited to about 18 teeth.

    If you put the freewheel at the drive end, it would need standard, right-hand threads. Standard RH thread freewheels are available with sprockets ranging from 16 to 22 teeth. And, you can get high-quality freewheels with RH threads. The disadvantage is that the drive chain is 'coasting' along with the bike, but, chain losses are very small (if properly aligned, the drag due to the chain is only in the 2 to 3 percent range.)

    Most of the drag you encounter with your current setup when coasting is probably due to engine braking - just as if you let off the gas with a standard transmission in an auto.
     
  3. skyl4rk

    skyl4rk Guest

  4. TREEWK

    TREEWK Member

    Staton Sells Shaft Adapters With Slotted Inside Diameter Holes (will Fit Shafts From 5/8" To 1"). The Adapters Are Outside 1 3/8" X 24 Tpi That Free Wheel Sprockets Or Adapters For Large Sprockets Will Fit. You Can Flop Them Over For Push Or Pull Applications. I Did A Lot Of Searching To Find Different Goodies. Have You Looked At My Posts In The Comet Drive Thread. I Have A Neat Free Wheel Set Up For Rite Hand Drive. Hope This Helps. Ron
     
  5. loquin

    loquin Active Member

    The only problem with 'flopping them over' is that they could try to unscrew themselves from the threaded adapter...
     
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