JFOYH 4-Piston Pre-Bled Hydraulic Disc Brake Set for Mountain Bike, Bike Disc Brake Kit with 160mm Rotors, Front and Rear Levers(PM Adapter Included)

Super powerful. Fits razor mx650. But you need to swap the front stock disc to the back of the bike for the rear brakes to work and than get another front razor mx disc for the front. Looks super cool. They also feel super high quality. No squeak. Functions better than stock cable brakes.

Put these on my stealth bomber e bike, weighs about 200lbs and goes 80km/h, these stop it like a dream. Now with that said I’ve put new pads in the front from the start (brand called top brake), and a 203mm rotor front and back. Levers are good quality. Great buy for the price, especially if you have a smaller/lighter bike.

So far so good on these. I decided to upgrade the Avid BB5 mechanical disc brakes that came on my Specialized Rockhopper (2009ish). I've been taking a lot of steep, technical trails with big roots, rocks, burms and drops lately. Downright scary with the close to zero stopping power of the BB5, even after brand new pads. These brakes are a huge upgrade on the ride. So much more confident that I've got the braking power when needed. Installation was straightforward. The only issues were one of the rotor bolts was cracked (poor manufacturing) and for my old 18" 26er, the rear cable is a few inches long. I'll probably shorten that in the future. So far 8 or so rides - no fade, no leaks and great performance. Well worth it.

They work great, the only issue with pre bled brakes is that you have to out the line on the outside of the frame.

High quality, low price. Good match. Installed on 2010 Specialized Crosstrail Sport to convert to an ebike with Tongsheng TSDZ8. Had rim brakes. Fit perfect, great value.