Disc Brake Calipers (Brake Pad Included)

Cycrown CycKnight Brakes.....

Sorry to say the brake pads are basically worthless after the kids ride their bikes for two weeks. The bikes are heavy and the pads are small and have very little material on them. When you go to order they are out of stock so you have to order the brake calipers and the pads together. Now they are also out of stock. I ordered (3) calipers and received (2). Still waiting on the last one to come. Is there an upgrade to these brakes. The bikes themselves are great, but the brakes are horrible to say the least. Please say that there is an upgrade to help us out. Thanks for listening. Dan Ivey