Quote:
Originally Posted by trey100
The stats above say the standard 335 rotor is 340x30 and weigh 22 lbs. it also says the 2NH brakes are 370x30 and 36 lbs. So basically an increase of 1" in diameter. It doesn't make sense that one would gain 14 lbs from a 1" gain in diameter. Based on volume of material, the increase in size has 18% more material so should be 18% heavier, which takes it from 22 to 26 lbs. I checked online and although the numbers above are listed correctly, my guess is there is a typo somewhere, probably the "26" became "36".
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I took the weight Information form the BMW online part cataloge. I have no other source to verify. I agree that the listed weight of:
34 10 6 797 606 Standard rotor 370x30mm (S2NHA Standard rotor for 335i)
16.50 Kilogramm / 36.4 Pounds
seems quite high compared to the other 340 or 370 Rotors.
Maybe someone has another source to check.