The Ashima ARS75R-P-PCAC brake pads are known for their specific compound and design for high-performance road cycling on carbon surfaces. 

• Rim Material: These pads are specifically formulated for use with carbon rims.

• Compound: They feature a "Pro-Cac" compound, which is designed to handle heat buildup effectively and reduce thermal distortion on carbon rims, especially during long descents.

• Compatibility: The pads are designed to fit Shimano road brake systems, including Dura-Ace, Ultegra, and 105 models. An equivalent version for Campagnolo systems also exists (ARC75R-P-PCAC).