Quote:
Originally Posted by soundman98
So the slotted rotors don't offer any measurable advantage over a solid rotor? Just mostly more marketing wank?
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Well yes and no. Contrary to popular opinion slots and holes do not help cool brakes. They do however help with reducing dust, gases and moisture that can reduce friction. They are not a gimmick and serve a function when properly designed. The problem that comes up is that cheap rotors just have holes drilled or slots cut more for looks than application. A good slotted or drilled rotor will be FNC'ed or heat treated and have stress relief done. This costs money but without it those slots or holes can cause the rotor the crack and twist even during normal use.
So on a quality, well designed and properly processed rotor do they work? Most certainly, but at a price. On a cheap one they are mostly just bling for the ricers and could cut the life of the rotor substantially. So... if a brand offers a solid rotor for $10 and one that is identical but slotted for $20 you can bet it was not processed well.