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Re: Brake Rotor Size Questions. (archive)
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Posted by BC on September 03, 2000 at 22:13:27:

In Reply to: Brake Rotor Size Questions. posted by John Stevenson on September 03, 2000 at 21:59:57:


A few posts down it was mentioned that larger brake rotors don't shorten stopping distance, and their main advantage is that they are less likely to warp. Is this right? If so, how come cars w/ identical tires and similar weights have different stopping distances?

And how is it that the M5, which weighs nearly 2 tons, stops nearly as well as a porsche? I am sure the tire compound has something to do with it but I would think that rotor size and swept area is also involved...

Larger rotors in thickness have more of a warpage benefit than just larger swept area. But such as in an M5 when the diameter increases so does the size of the calipers and the number and or type of pistons in them. This really helps stop the vehicle and if you throw in the cross drilled type as with some Porsches which help keep them cooler, you get outstanding results. Hope this helped.


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