This is a Mongoose "snare" 24 speed. I'm using this derailleur I got off my Cannondale Bent 2 bike of same 8 speeds on the sprocket. Should it work? Mind you I had to manually bend the dropout since it bent when I broke the original derailleur. Not sure if I bent it 100% back original position. Anyway, it appears to have maxed out inwards an unable to reach the first gear. None of the those adjustment screws appear to be impeding its travel inwards. I was able to get to the 8th gear at one point but I also have issues with that. I'm wondering if even this derailleur is capable of changing gears across the whole gear assembly. Maybe it wasn't the original for the Cannondale?