The Jagwire Sleek Pro Road is a durable brake pad that offers long-lasting performance. It has a special compound that helps minimize brake squeal. It is compatible with any brand and/or model of road caliper. Cartridge pads allow you to replace the pad without having to re-adjust the brakeset. Shimano pad compatible. Attention Avid Shorty Ultimate owners: If you are having clearance issues with the stock Avid Ultimate pad holders these will get you the room you need. This problem is encountered by owners of smaller frames (with tighter seat stay dimensions) and wider rim users (Zipp 303, Hed, Velocity etc.). This holder has a much shorter post/nut but still has orbital washer adjustment for toe-in. Black holders only! NO silver.