|
The hat isn't a significant factor in cooling or thermal capacity -- you won't get any substantial difference in how long your brakes last between 1-piece and 2-piece rotors of the same size.
The weight difference is pretty good though -- and why you see 2-piece rotors on most racecars. 3-4 lbs of unsprung weight per corner savings is quite good. Think of it the same as buying lighter wheels.
|