ZOOM Hydraulic Disc Brake Calipers: HB-100 MTB Bike Disc Brakes Front & Rear Caliper Set for Mountain, Road Bicycle and E-Bike

Pretty cool inexpensive upgrade specially for scooters with mechanical brakes. I do recommend these. They do have a improved performance and for the prices worth it.

I’m not sure if I gained any stopping power, but I don’t have to adjust the brakes every two rides

Plush and powerful, big upgrade over mechanical and I went with a bigger rotor and adapter. A little tricky to get it lined up perfectly with the included washers but pretty straightforward. Leave the plastic tab in until you're ready to drop in the wheel and tighten the cable last, just enough to take up slack. Finally, tighten attachment bolts after centering the caliper by pushing the brake lever. Do not activate the brake without something separating the pads, eg. the yellow tab or your brake rotor. Follow bed in procedure, and voila you have great looking and powerful brakes. Can't comment on durability since I just installed, but I will update later. I would recommend these, especially at this price. Pretty much plug and play. I also read somewhere that you don't tighten the cable as you would with the mechanical brake after the pads have worn in, instead use the barrel adjuster which is above the brake cable where it attaches to the caliper. Very nice looking and an inexpensive upgrade. Zero noise and impressive stopping power.

I replaced rear mechanical caliper with zoom caliper, centered by depressing brake handle and tightened centering adjustment screws. Brake handle feels firm and wheel will brake while off ground. When I test while riding new caliper barely seems to slow e-bike. Brake handle is not spongy and was sold as not needing to require bleeding. No instructions were included with caliper to do so.

Fit on my Rad Rover with no issues! Much better stopping power now! 2 rides into using it and very impressed. There are some frequent reviews on the oring leaking but will keep an eye on it. Also, simple fix if they do leak with a new oring.

Quality, appearance performance, fit, price 💪💪

I've only taken a few rides so far on my Sondors electric fat tire bike. The stock brakes didn't last long at all, and I was having trouble locating new pads for them. Saw these, and I do enjoy my hydraulic brakes on my Giant Talon, and since I didn't have to switch out the cable pulls, heck yeah let's give 'em a try.They arrived in a plain box, with two plain boxes inside.No instructions, no web address listed on either box, just brakes, and bolts. The only instruction on the product page said to NOT REMOVE THE YELLOW SPACERS. Now I've swapped out brakes before, but I got a little confused - like, how do I slide the pads over the disc if I don't take out the YELLOW SPACER?So off to YouTubew, found an english bloke, who yanked out that yellow tab, slid the brakes over the disc, and his world didn't end. So I followed suit and everything went fine. I think what they mean is to not pull out the yellow spacer, and actually actuate the brake by pulling the arm back.That could have been more clear. And, really-– safety gear should always have proper instructions, and brakes are literally the piece of gear that stops you from launching off a cliff, or doesn't, so they should really have proper instructions.Other than that, I have enjoyed very smooth and confident stops.

This my three pairs of HB 100's work very good wet or dry , eazy to set up, eazy to bleed