The
Ultimate OE-type replacement brake rotors for BMW.
REAR for:
E39 540i
E39 530i
E39 528i
E39 530i
PLEASE MAKE SURE THE BMW PART NUMBER IS CORRECT FOR YOUR
YEAR/MODEL BEFORE ORDERING: 34 11 6 767 059
UUC recommends Low-dust Hawk Performance Ceramic brake pads
available for ordering with rotors.
What
makes the best brake rotors?
Details, details, details, and value!
UUC Ultimate OE-size replacement rotors are slotted, plated,
and manufactured using the best techniques and materials.
Slotting: there are many reasons to slot rotors. Primarily,
slotting aids in removal of water and debris on the rotor surface, evacuation
of hot pad "off gassing" vapor, and provides a visual wear indicator.
Details: These slots do not extend all the way to the edge
of the rotor for a very specific reason; this maintains the structural
integrity of the rotor. Other brands with slots all the way to the end have
created "stress risers" where cracking may develop. No such problem
exists with this design. Additionally, directional slotting enhances
effectiveness.
NO DRILLING! Drilled holes in rotors often used for
"show" are prone to cracking and catastrophic failure. The holes
create stress risers which will lead to this sort of failure. Additionally,
drilled holes do not improve cooling, rotary-vane rotors lose efficiency when
drilled because cooling air does not not pass through the rotor
circumferentially but is instead prematurely evacuated by the holes.
Plating: Multi-stage plating resists unsightly corrosion on
the rotor hub and unswept areas of the rotor face.
Precision: due to the ultra-precise tolerances used for
run-out, parallelism, and surface flatness, absolutely no pre-installation
machining is required for smooth operation without vibration or shimmy.
Manufacturing
details:
Meets SAE J431 standard for grade 3000 gray cast iron
Alloying: Copper and Chromium added to achieve specific
hardness and tensile strength.
Precision-controlled cooling during the casting process
creates a uniform distribution of graphite flakes, thus increasing wear
resistance and the ability to dissipate heat. In contrast, premature cooling of
cast iron can cause iron brittleness, thus making the brake rotor more likely
to warp or crack, especially when overheated under hard braking conditions.
Run-out less than .004".
Parallelism of machined surfaces within .0005"
tolerance.
