ZRACE XG4 Flat Mount 4 pistons Caliper, Road Hydraulic Brake Caliper, ICE-TECH Pads, BMX Raceing Caliper, Full CNC Lightweight，F

No forum posts were provided about the ZRACE XG4 flat mount four-piston caliper, so no user-generated information is available to summarize typical product attributes such as price, weight, material, standards, pros, cons, or frequently asked questions.

The reviewer purchased a set of ZRACE XG4 brake calipers from AliExpress to replace incompatible L2 calipers on their gravel bike. They describe the calipers as having a very in-your-face green color (available in various colors), a four-piston design, a one-piece construction with no joining seam, and being noticeably lightweight. After installation and testing, the reviewer was very impressed with their performance, stating they feel incredibly powerful with direct lever actuation, confident lever feel without mushiness, and good modulation. The calipers completely fixed the mounting problems with the frame and were straightforward to set up and bleed.

The reviewer states they purchased the ZRACE XG4 four-piston calipers as an upgrade for their road bike, finding them to be a significant improvement in braking performance over their stock calipers. They have been using them for a few months with no problems.

The reviewer discusses the ZRACE XG4 Flat Mount 4 pistons Caliper extensively throughout the video. They mention purchasing these calipers from AliExpress, noting their excitement about the four-piston design, which is unusual for road bikes. The reviewer highlights the calipers' lightweight CNC construction, flat mount compatibility, and the inclusion of ICE-TECH pads. They compare the design to Hope RX4 calipers but note the significant price difference. The reviewer installs the calipers, tests them extensively, and finds them to offer exceptional braking power and modulation, though they acknowledge the calipers are overkill for most road biking scenarios.