Available in 2 choices of compound: Sintered cycle disc brake pads Clarks sintered cycle disc brake pads use harder compound pad with increased carbon content. Sintered pads are designed to deliver maximum performance under stress and extreme conditions. Consistent through sustained riding they are ideal for hydraulic brake systems. Organic cycle disc brake pads Clarks organic cycle disc brake pads are specifically designed to give the best performance under normal conditions. The organic compound gives improved noise reduction as well as increased ‘bite’. Recommended for use with Mechanical Systems. Model Compatibility: Hayes HFX-1 to HFX-9 Supplied with spring clips where applicable