I just said screw it, and bought my own tool, because the tool can often be had for less than $10, which I think is about what I paid for mine.
Yeah, that's what I figured. I bought a gear puller for $10 'cause at least it's useable as a gear puller too. Maybe I'll just buy and then return one if I can't borrow one.
then thread in the tool to those big threads.
Ahhhhh... the BIG threads. That makes more sense. I was thinking "Do I have to buy 2 different tools now, for the different small threads?". Duh. Great, thanks.
First question: are you trying to get the sprockets off, so you can use them or the wheel hub (and it's built-in freewheel) separately, or are you wanting to use the whole freewheel mechanism on something other than the wheel hub?
Either/or. General disassembly. I think I will have a single big gear at the cranks, and then mount a cassette under the seat (so I'll have 1 rear set at the rear, one rear set next to the power sprocket, coming from the front wheel).
The freewheel, I'm aware on this type is somewhat built into the hub, so probably not going to try too hard with that.
Have you removed the locking sprocket(s) on the outside? Usually one or two of the smallest sprockets unscrews, or a separate lockring just outboard of all the sprockets.
Aha. I could not find a lockring, and I could not pull the cassette off. I wasn't aware sometimes the small sprockets unscrew first.
It has spline teeth but they're only 1/8" deep. So chain whip (chain-in-a-vice for me, since I don't own a whip), and I'll make a spline tool from a bolt. I noticed when I turn them backwards it freewheels and presumed that must not be how they come off. Duh, gotta hold it with a whip.
Thanks again. Total bike noob I am.
I'll have to come bakc to try to help with the gearing--my brain isn't up to doing math right now.
I don't need help with the math. My question is related to... I see people saying things like, for power-side chain-redirector pulleys never go smaller than 3". I'm wondering about torque or tooth wear or anything like that. Like, any reason I couldn't use a very small sprocket, that wouldn't be obvious to me right away.