Race-Driven Severe Duty Sintered Metal Brake Pads You will receive 4 sets of brake pads to replace the front and rear brakes on the following: 2016 2017 2018 2019 2020 2021 2022 2023 2024 Polaris Sportsman 850 High Lifter Severe Duty Brake Pads are the newest compound design by Race-Driven. They are a sintered metal pad that will far outlast any pad on the market, semi metallic, organic, or otherwise.