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03-15-11, 09:52 PM
I have a set of ACS mag wheels that I pulled off an old Diamondback years ago. I'm wanting to re-use them on a bike that I'm putting together for my daughter. I'm having issues with the freewheel/axle/hub assembly. My giant disclaimer is that up to now I have only built road bikes for myself, I'm new to BMX. The problem that I'm having is with the freewheel assembly that is different than the typical one that threads on to the hub. The one that I have threads on to a cone nut that is slid through the center of the hub. Once tightened it is supposed to hold the freewheel in place, allowing it to spin but still keeping tension when you pedal. However I seem to be missing a piece because as I ride the cone nut works itself loose allowing the assembly to spin freely when I pedal. There are 4 concave shims that I thought would keep the pressure but they just flop around doing nothing. Pardon the picture quality, I used my cell phone.
Wheelset in question:
http://i1092.photobucket.com/albums/i418/sampleethan/BMX/DSCN8921.jpg
Rear wheel:
http://i1092.photobucket.com/albums/i418/sampleethan/BMX/2011-03-15195643.jpg
Where freewheel and bearings go, cone nut is slipped through other side of wheel and is held tight from inside:
http://i1092.photobucket.com/albums/i418/sampleethan/BMX/2011-03-15123620.jpg
Axle with bearings and freewheel:
http://i1092.photobucket.com/albums/i418/sampleethan/BMX/2011-03-15123735.jpg
Freewheel assembly with cone nut tightened:
http://i1092.photobucket.com/albums/i418/sampleethan/BMX/2011-03-15123817.jpg
Same as above but with cone nut loose. This is what happens as you ride:
http://i1092.photobucket.com/albums/i418/sampleethan/BMX/2011-03-15123837.jpg
The 4 shims that seem to do nothing:
http://i1092.photobucket.com/albums/i418/sampleethan/BMX/2011-03-15195626.jpg
What am I doing wrong and/or what am I missing?
Wheelset in question:
http://i1092.photobucket.com/albums/i418/sampleethan/BMX/DSCN8921.jpg
Rear wheel:
http://i1092.photobucket.com/albums/i418/sampleethan/BMX/2011-03-15195643.jpg
Where freewheel and bearings go, cone nut is slipped through other side of wheel and is held tight from inside:
http://i1092.photobucket.com/albums/i418/sampleethan/BMX/2011-03-15123620.jpg
Axle with bearings and freewheel:
http://i1092.photobucket.com/albums/i418/sampleethan/BMX/2011-03-15123735.jpg
Freewheel assembly with cone nut tightened:
http://i1092.photobucket.com/albums/i418/sampleethan/BMX/2011-03-15123817.jpg
Same as above but with cone nut loose. This is what happens as you ride:
http://i1092.photobucket.com/albums/i418/sampleethan/BMX/2011-03-15123837.jpg
The 4 shims that seem to do nothing:
http://i1092.photobucket.com/albums/i418/sampleethan/BMX/2011-03-15195626.jpg
What am I doing wrong and/or what am I missing?