Review on High-Performance SHIMANO Tourney 7/8-Speed Rear Derailleur for Mountain Bikes - RD-TX800-L (Black) by Mike Larkin

I ride 12 miles a day, rode 600 miles on a Walmart bike, my chain and derailleur burned out as expected. I bought it on a budget and got something different. My bike is all black with very little chrome, which is what drew me to it, but I have one with a chrome cage. I didn't find out until after installing it, so it'll stay that way. Now for the installation. I set the switches but that was my first setup. As far as I know it's a 7 speed switch. I installed set screws to free the entire crankset. Pedal and downshift, perfect. Shifts perfectly into 1st gear and refuses to shift under my triggers. Okay this is a stock bike now, plan on getting better gear in the future anyway.