Hope RX4-SR disc brake pads are available in a range of compounds to optimize riders specific performance needs. All pads are designed and dyno tested in-house at Barnoldswick. FEATURES: Designed to work with SRAM dropbar brake systems (DOT Fluid) Softer than sintered, organic pads are low-noise and perform best in dry conditions, but wear faster SPECS: Pad Shape Number: 40 For RX4 Caliper Road Organic Compound