Dalplex

Hello, I believe this had discussed before but I had not found the difference between composite and traditional one piece rotor.

What is exactly the advantage for this composite 2 pieces? Why wasn’t anyone selling the outer ring only? Any user of this brand from rock auto?

thanks

JohnLane

I gave my 221 S-65 a Brembo big brake kit that got rid of the pair of (heavy) sliding calipers and made for bigger rotors on hats.
Point of doing this being to reduce unsprung weight and increase the ability of brakes to handle large thermal loads that go along with stopping the land yachts we so love to abuse!
They looked good, stopped very well but warped every bit as badly as OEM brakes. I’m admittedly hard on brakes. I DRIVE my cars. Brakes are consumables.

My 222 S65 is equipped with Carbon Ceramic brakes. HUGE reduction in unsprung weight (rotors weight 3 or so pounds each. Really!) + pads and rotors last and last with no brake dust.

maw1124

Yeah JohnLane, I split the world neatly into 2 categories: those who deemed the '92 500E brakes insufficient and those who didn't. You're obviously in that first category. Jokes. This is the same group who need carbon ceramic brakes on a road car.

In all seriousness, I've had that thought maybe a half dozen times in the dozen or so years I've owned it. Sure I drive the cars, but I don't need serious braking power from triple digit speeds with any regularity, and that's by design.

When I want to flog something, that's what the M3 is for.

maw

mbwillgrubs

Just to answer the "two piece" part of the question...
usually the two pieces are different materials. For example, the hat could be made of aluminum whereas the disc could not (usually cast iron or some steel alloy). The fasteners between the two pieces can also be designed to allow for thermal expansion in a direction yet fix the disc in another. This could reduce warping that might occur in a large casting being subjected to thermal cycling.
Get the best brakes you can afford and drive accordingly?