So, I am slowly learning stuff by doing it when the need arises. My old wheel with the hub issues is a much better wheel than the one on my beater bike that I use to ride the grandson around on in a kids seat. Can I get a new hub/bearing package/whatever then Google instructions and try getting this thing working for my old bike? The old bike is a 7 speed (which is fine for what I use it for). A quick look online disclosed a Shimano 105 hub at Nashbar but I didn't find anything else. I also didn't see any 7 speed cassetes readily available. Would I need to get ambitious and actually buy a nine speed and a new derailleur, and a new shifter? Seems like a bit much for a bike that works as is. This thing is a Specialized Crossroads about 15 years old.