A few days ago the cog on my Schwinn Ranger rear bike derailleur broke in half after changing gears.
I examined the cog and it was made of flimsy plastic. Was wondering if I could put a new/different rear derailleur on there for this same make and model but of higher quality, with metal cogs.
The bike derailleur that was on there before was a Shimano tourney tx which go for about $6 online. Want to upgrade but not sure how to go about it or what is the correct ratios and such for it.
I know with car parts everything has to be in accordance with the brand and specs. What rear bike derailleurs would be the best fit for a Schwinn Ranger? 21-speed.