Hopefully someone can answer this quickly since my car's in the air. How do I prevent the front hub/rotor from rotating when trying to tighten the nuts on a wheel spacer? Short of I guess someone depressing the brake, I can't figure a way to torque the nuts down. I kinda hoped I could just hold onto the rotor, but no. Any suggestions? How have others done this?

I should note, these are Ichiba V2 spacers, studs are already in them, and I'm trying to torqe nuts down on the stock studs.

When doing my FWD axle nuts, I used to use a really long breaker bar and wedge inbetween two studs and the ground.

when i did it, my buddy torqued it down and i pressed on the brake n that worked

^^^ just ask a neighbor or a friend to sit in the car with the brake down....

spin a couple of long barrel nuts onto two of the studs, (to protect the threads)
Then use a breaker bar between them as a lever.


:edit:
oops... I see Jeff already covered it.

Thanks for all the feedback everyone. I was able to get this done. Unfortunately I didn't have a breaker bar, or anything that long handy (live in an apartment building, very limited on my tools). What I ended up doing was sticking the head of an open-ended wrench into the rotor, the hallow space between the two "plates" of the rotor. This left the rest of the wrench sticking out. When placed against the caliper, the wrench prevented the rotor from turning. Not something I'd want to do on a regular basis, but it worked well and I don't think anything got damaged. And now I have my front spacers on, woohoo.