Review on 🚵 JFOYH 4-Piston MTB Hydraulic Brake Set with 160mm Floating Disc Rotors - Front and Rear Hydraulic Disc Brake Kit for Mountain Bikes (Pre-Bled, Original Pads Included) by Eric Jefferson

I'm wondering why I kept losing compression after 3 pump attempts. I removed the breather well and noticed the piston looked loose and came out easily. No seals, no removal effort as with Shimano or SRAM products. Garbage. My guess is that the source of their air was a piston seal failure due to poor product design. The metal on the air vent is incredibly soft, allowing it to essentially be removed once. The bleed screw on the lever is incredibly soft, so plan on using it once. Standard mineral oil comes out cloudy, so there's contamination across the board. An honest review from someone who has ridden each brand, I would save money and just buy a Shimano m315 or Magura S. A video of me removing and throwing them away is coming soon.