You've read the phrase use with recommended brake pads many times. If you have the Mavic Cosmic Carbone SLR, Cosmic Carbone SLE, R Sys SLR, or Ksyrium SLR rims, the Standard Exalith II Brake Pads are exactly what is recommended. If you're looking for spare stoppers for the CXR Ultimate 60 Clincher wheels, then you'll want the CXR Exalith II pads, which are longer and skinnier than the Standard pads to account for the CXR's wider rim. Wither way, the wheels use an Exalith coating to improve stopping power and minimize wear to the braking surface. While a standard brake pad will be demolished by this coating, the Exalith II pads are hard enough to take advantage of the increased stopping potential of Exalith II. This means longer life for your pads. Please note that the CXR pads included here are only for use with the CXR Ultimate 60 Clincher wheels. The CXR 60 Clinchers have an Exalith II brake track, while the CXR 80 Tubular and CXR 60 Tubular wheels have carbon brake tracks, which will be chewed up by the super hard Exalith II brake pads, voiding warranty and damaging the rims.