Originally Posted by
roadie276
Does anyone know how much these extra bits end up adding to the effective weight of disc wheels? I want to compare apples to apples.
If I am not mistaken, the wheels you are specifically mentioning use Shimano Centerlock mounting interface. The rotor side of the hub has a spline that the brake rotor is slipped onto that is then fixed with a locking collar that uses a cassette lockring tool to fix (12mm TA) or a 16-tooth BB tool to fix (15mm and larger TA). A 160mm SM-RT800 rotor weighs 128g, with lock ring. The 140mm is 108g. Some road bikes use 160 front and back, some use 160/140 F/R, and some use only 140.