Is there a down-side to using cross drilled discs?
I had drilled discs on my BMW and Ducati motorcycles with zero problems even when they got red hot. But I still don't know about using them on the RAV4.I've not had cross-drilled discs on any of my cars, but wonder whether the hole edges might accelerate brake pad wear . . .?
Reduction in surface area. Reduction in thermal mass. Stress risers for crack propagation.Is there a down-side to using cross drilled discs?
In the old days when you stompped on the brakes the pads would heat and the brake pad surface would essentially burn and release a gas. This pocket of trapped gas would negatively affect braking performance. The drilled holes would allow the gas to vent. In conjunction with the cross drilled holes slots were often machined into the rotor. These slots gave a chess grater effect and prevented the pads from glazing.Question is what is the advantage?