Originally Posted by
Helix Lamont
3. Are there any special measurements I have to know before ordering a freewheel off Amazon, or is it as easy as choosing the same gear number?
In addition to the good advice offered above, I can think of one more thing that's relevant here...
When choosing a new freewheel, in addition to the number of gears, you also need to pay attention to the gears' size. If you pick a freewheel whose biggest cog is larger than your original, your derailleur might not be able to handle it (you'd need to confirm your derailleur's specs) and you'd likely need a longer chain.