Relentless Autosports: GROUP BUY / 2 piece F&R rotors set for the Akebono brake kit

Scott @ RA

^^ I'm pretty sure all these questions are answered in the first couple posts, please read it again carefully for your answers ... Here you go anyways....


Both front and rear rotor hats are made of 7074 Aircraft grade billet aluminum, then is hard anodized

Yes, it is and works great

The front is 14" OD, 8" ID The rear is 13.8" OD with a 8.378 ID

Sure, if that is what you want

The rotors are attached to the hats with aircraft grade stainless steel alen bolts, T-Locks, and locking fasteners

No need for wire tieing

Well first off we are dealing with rotating & unspring weight here, not just unsprung and not just rotating. The ratio is approximately 3 to 1 for unsprung weight vs static weight and approximately 10 to 1 rotating weight, like I stated.
Most 18-19+ wheels depending on where the mass is on the wheel (moment of ratio), is about 10 to 1 (as a rule of thumb) static weight vs rotating wheel weight. That rule of thumb of 10 to 1 has been used by racers for decades. Since these rotors do not carry the same mass in the same area as a wheel does (moment of ratio/ inertia) but is further in twords the axis point, it is a close ratio estimate to say 8.9 to 1 or so.
Using this approximate ratio, it is safe to say that adding these light weight rotors as apposed to the stock Akebono's is roughly 26+ pounds lighter (static weight). Multiply that by the estimated 8.9 to 1 as that of static weight and you get about 231 pounds.... 26 lbs x 8.9 = 231.4 lbs that the car should/ will react lighter to acceleration, braking, and corner G loads.

That my friends is a sizable advantage, to say the least.