Help! Clicking sound from new wheels

I have an '04 CLK320

I was able to put the wheels on tonight. 18x8.5 front, 18x9.5 rear. Pzero Nero Tires 225/40/18 front, 255/35/18 rear.
However i have a minor problem i need your help with.

It seems that on the rear wheels there is a clicking sound. as if something is slapping up agains the tire in rotation. I checked all around and it doesn't seem to be rubbing up agains anything. It clears the breaks, wheel wells and all. It is not a rubbing sound that is consistant. just a tapping (tick...Tick ... Tick)

Also i was trying to figure out the propper tire pressure for the front and the rear?

Thanks for the help

The lug bolts are probably too long and catching the parking brake springs.

exactly!

Thanks for the tip. i will check it out asap.

hey bud i had that problem to drind the end of the lug nuts down it works out great then

thanks for all the advice. i grinded down the lub bolts and the clicking stopped. i posted some pictures up on cardomain.com.
if anyone is intersted, have a look. thanks

link to my cardomain page

I am having the same problem... The bolts I have are 1.12" in thread length, any suggestions on how long they should be?? Thanks

It is really hard to tell because it depends on the new rims that you got. The stock bolts that i had my factory wheels attached with are really too long. The new set i got was about a 1/4 of an inch shorter. The method i used is pretty simple. Take your old rims. Stick the bolt into it and measure the length peaking out from the other side. Then do the same for the new rims. You will notice that the bolts in the new rims are long.

let me know how it goes. i may be able to take some measurements for it if the above doesn't help

I cant seem to figure it out, I tried what you said, I am just not too savy when it comes to these things.... I am having discount tire do the work and they dont do anything custom so its kind of difficult....Thanks I appreciate all your help

Ok, when i get home from work i'll pull one of my bolts out and give you some measurements. all they really have to do is grind them down for you. I did mine since i have a shop grinder (long story)...

I'll reply as soon as i get it all together for you tonight.

I did find out that I have to cut the bolt down a 1/4 inch...but now i cant find anyone to do it....Any Suggestions??

I think the easiest thing and cheapest would be to go to any tire repair shop. Not the places that sell rims, wheels... just a simply place that repairs flat tires. All they really need to have on hand is a regular shop grinder. Job takes about 15min. Try even a gas station with a repair shop. They usually have grinders there. Body shops will as well.

Where are you located?