Category: Mountain Bike Gears and Components As a mountain biker, I understand the importance of having reliable and efficient gearing systems. That's why I decided to test out these four Shimano rear derailleurs and provide my thoughts on each one. First up is the Shimano Acera Mountain Bike Rear Derailleur. This is a high-quality component that offers smooth shifting and durability. The design of this derailleur is sleek and modern, making it a great addition to any mountain bike. One thing I appreciate about this derailleur is its ability to handle tough terrain without slipping or getting stuck. Overall, the Shimano Acera Mountain Bike Rear Derailleur is a solid choice for anyone looking for a reliable and efficient gearing system on their mountain bike. Next up is the Shimano Tourney 7/8-Speed Mountain Bicycle Rear Derailleur - RD-TX800-L (Black). This derailleur offers a good balance between speed and durability, making it a great choice for intermediate to advanced mountain bikers. The design of this derailleur is simple yet effective, with a black finish that looks great on any bike. One thing I appreciate about this derailleur is its ability to handle a wide range of speeds without slipping or getting stuck. Overall, the Shimano Tourney 7/8-Speed Mountain Bicycle Rear Derailleur - RD-TX800-L (Black) is a solid choice for anyone looking for a reliable and efficient gearing system on their mountain bike. The third product I tested was the Shimano Acera Mountain Bike Rear Derailleur. This derailleur offers smooth shifting and durability, making it a great addition to any mountain bike. The design of this derailleur is sleek and modern, making it a great addition to any mountain bike. One thing I appreciate about this derailleur is its ability to handle tough terrain without slipping or getting stuck. Overall, the Shimano Acera Mountain Bike Rear Derailleur is a solid choice for anyone looking for a reliable and efficient gearing system on their mountain bike. The fourth product I tested was the SHIMANO Tourney 7-Speed Mountain Bicycle Rear Derailleur - RD-A070. This derailleur offers good speed and durability, making it a great choice for intermediate to advanced mountain bikers. The design of this derailleur is simple yet effective, with a black finish that looks great on any bike. One thing I appreciate about this derailleur is its ability to handle a wide range of speeds without slipping or getting stuck. Overall, the SHIMANO Tourney 7-Speed Mountain Bicycle Rear Derailleur - RD-A070 is a solid choice for anyone looking for a reliable and efficient gearing system on their mountain bike. In conclusion, all four of these Shimano rear derailleurs are high-quality components that offer smooth shifting and durability. The design of each derailleur is sleek and modern, making them great additions to any mountain bike.