Stick to a solid rotor.Unless youre horsing it down the alps its unlikely you'll get that big a heat build up ( and then DOES it actually make a difference
I think the floating are heavier also
The 180mm Hope Saw rotors on my Bulls each weigh 145g, or 37g more than the bike's original one-piece Formula RX rotors (108g)
As for making a difference, yes they do. When a one-pice rotor heats up, it'll start to warp. A 2-piece rotor won't have that problem.
Im not sure youre correct in that RB ? Just because its attached to an alloy carrier is not goin g to prevent it from moving,alloy is a metal too you know ,also affected by heat
Strange then that they did away with the 5 bolt rotor on it's alloy carrier. I do remember quite clearly how they 'proved' that the new 6 bolt rotors were cooler
seems now that that was a pile of poo.
Personally i think its a whole thing is a huge pile of steaming nonsense, designed to sell new bits to you when you dont really need them
Well, the theory (and the practice) is that because with the floating rotor the braking surface isn't in effect part of a large disc, (albeit one with lightening holes) but rather just a ring, it is more free to expand in diameter whereas with the one-piece rotor the brake track tries to expand but is constrained by the non-braking area (even if that is effectively just spokes). Consequently, all it can do is to take on a wave form distortion which is felt as pulsing through the lever.
The alloy carrier is largely isolated from any heat build-up so doesn't expand significantly.
That's my understanding of it anyway, and it's backed up by my experience of using them.