privateer-wheels

@AndrewCuretonrlD: yep! To me, they feel very similar, if not the same. As noted in the comment above, gripping your brake lever with force will lessen the effect of one of those (loose pads) but not lessen the effect of center-lock-rock.

@dlxah: 6-bolt actually have 6-bolts applying true clamping force on the rotor, which is what does the heavy lifting to keep the rotor fixed in place. But those bolts can some loose too! neither system is perfect. As fore what makes the wheel rock back and forth - the terrain and cycling of your suspension and chain length over features on trail, while you apply brakes, presumably. I'm no expert here, but did have the conversation with an expert who does have the actual data from braking instrumentation to prove it. Check out Brake Ace, and how those devices work - they register forces in both directions.

@pmhobson: center-lock-rock, and movement in brake pads, feels pretty much identical. Movement in the brake pads will get better if you really clamp down on the brakes, as everything is sandwiched between the pistons in your caliper, which as some point will stop that rock almost entirely if your brakes are powerful enough. The same can't be said about center-lock-rock, it will persist regardless. But again, they feel like the same thing when lightly grabbing the brakes and rocking the bike. Neither are real performance issues, IMHO. If anything I would say brake pad movement is worse, because it sometimes comes with pad rattle when you ride.

@pmhobson: They can rock back and forth. They need to be manufactured in such a way that both rotor and brake mount fit every time, so there is some degree of clearance between both. That translates to rotor rock on many hub and rotor combinations - the lock ring, doesn't actually (or shouldn't actually) apply too much clamping force to stop it from rocking, largely because it would increase the likelihood of the rotor being able to loosen the lock ring when the wheel cycles back and forth - and through technical riding, a wheel will actually oscillate between forwards and backwards movement. I had a great conversation with the owner of Brake Ace, who actually confirmed this is a regularly occurring phenomenon, which we sees in the data his instrumentation collects on braking forces. The wiggle/rock doesn't really affect performance, but some people find it very annoying. I use CL on many of my own bikes and while I feel is when applying the brakes and standing still and rocking the bike, I've never noticed it while riding.

@AlejoB: Ontario for sure.

My apologies - I didn't mean to hit reply here - please ignore.

Been on a Madrone Jab all season, and it's worked wonderfully well.