s2kshepard

So doing a lot of track day prep for my 2nd track day. I removed the 2 rotor screws because everyone says they are unnecessary and I want to be able to throw on another rotor if one cracks at the track.

Went for a drive, feel a vibration. Almost feels like tires badly out of balance.

My front passenger brake rotor is wobbly with the lug nuts torqued. Wtf? Video below, yes it's dark but I can do another tomorrow.

https://youtu.be/QPdVqMOmJ3k

Car Analogy

With the wheel off and screws removed, the rotor can move around a bit. If rotor is not centered on hub when you put wheel on, or if it moves as you try to put wheel on, it can end up crooked, even as you torque wheel down.

B serious

Did you rotate the tires and forget to swap a hub centric ring?

Or are you using stock wheels and attempting to use a rear on the front?

Billman250

s2kshepard

I did say the rotor was loose ☺

s2kshepard

Ok guys, your hints got me the solution. Somehow I accidentally put the rear wheel on the front. They're square so it "doesn't matter" but the rear has a different size centering ring.

lesson learned