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The Ultimate OE-type replacement
brake rotors for BMW.
FRONT for all E30:
325is
325i
325iX
325e
325es
323i
324td
324d
320i
318is
318i
316i
316
PRICE PER PAIR
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.
© 2007 Chiba Technologies, Inc. d/b/a UUC Motorwerks
