Cayanmydery Black Bicycle Rear Gear Shifter Metal Chain Guard Bicycle Rear Dial Protector

The Cayanmydery Black Bicycle Rear Gear Shifter Metal Chain Guard Bicycle Rear Dial Protector is marketed as a universal product, but according to some reviews, it doesn't fit larger axles seen in e-bikes, which could be a downside. However, it is also well made and sturdy, and it does its job to protect the derailleur when installed correctly. Some reviewers point out that it barely covers the cassette, and it may require some modifications to fit properly, but once installed, it works well. The lack of instructions is also mentioned as a negative by one reviewer. Overall, the Cayanmydery Black Bicycle Rear Gear Shifter Metal Chain Guard Bicycle Rear Dial Protector is Considered a good protective measure by some, as it prevents the derailleur from being damaged or derailed. However, its universal fit may not work for e-bikes with larger axles.