Review on INKESKY Shimano RD-TZ31-A Rear Derailleur: High-Performance 6/7 Speed Hub Bolt Mount for Mountain Bikes by Djuan Thompson

The product itself is not the best but could be worse. To hold the derailleur when you reinstall the rear tire and the pulley bolts are either too tight or too loose and you get stuck between a stuck paddle or possibly lose it mid-ride. My suggestion is to salvage all the parts for the old switch, like the screws, and use them for the new one. Also, KEEP EVERYTHING GREASED or you will severely shorten the life of your new derailleur. After installation it works perfectly. I'm in my third week at 40 miles and all is well