The old bike wheel has an "AccuShift PowerRing" label on it, but I can see the screw holes are in different locations from the new one (pics of old bike and chain wheel, and new one below as soon as I can figure out how to upload them).
I really like the faster speed with the larger toothed wheel. You would not think it makes such a big difference, but it does.
It looks like I can't swap the old wheel to the new bike. But does anybody know what the new chain wheel is by the pictures, and where online I might buy a larger wheel that would fit it and could be swapped? I have seen YouTube videos where they say you can do it without even removing the pedal sometimes, provided you find the right replacement and of course raise the chain mechanism higher.
But my biggest problem is finding the piece I think. Thanks for any help!