It's an old photo
Join Date: Aug 2006
Bikes: Cannondale R500, Specialized Hardrock
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There are ways to get those off without the tool, just with a very strong vice.. of course you ruin the freewheel, but it doesn't sound like you would need it anyway. Doing it this way, you do sort of risk ruining your hub...
1: insert a punch into one of the holes on the ring that says falcon, hammer at it counterclockwise (I think these are right hand threaded). This is assuming you don't have a pin spanner, if you do, just use it.
2: Dismantle the freewheel mechanism, which may involve removing the axle. This may be a little tough, and be weary of the 200 million little freewheel ball bearings.
3. At the very end you'll be left with this stub with places for the pawls and threadings.. this is likely screwed on very, very tightly to the hub where you would be screwing your single freewheel on.
4. Clamp this side down very tightly in a metal vice, preferably one that is securely mounted. There should be flats around where the pawls would go, make sure to clamp to these surfaces. Make sure not to really torque on it, or you'll just pinch it to the hub, but it should be secure.
5. With the drive-side facing down, you want to turn the entire wheel left to unscrew it (it's right-hand threaded). This will take some force.
And you should be home free. Install the axle if needed. I think Sheldon Brown does a better job explaining this somewhere.