Review on 🚲 Shimano Rd-tz 31 Rear Derailleur: 7-Speed Hub Bolt Mount for Efficient Shifting by Chad Cross

It's a shame Shimano chose a Chinese junk company to make these switches. Don't waste your time and money like me. Looking for them the part numbers will be changed to ensure they replace the original Shimano on 4 of my kids bikes. They fit and "replace" them, but they definitely won't last long. At least two weeks driving time for a 10- and 8-year-old child, and one of the small sprockets fell off ("bearing" fell out, a small pin fell out). I know the bikes they ride aren't very expensive. For starters, and these switches aren't made for racing/touring, but if they can't even last a year or two (at least like the originals), what's the point? Come on Shimano! Isn't the reputation of your name more important to you?