Just switched back to my stock 19'' today from my snow tires.
What is that screw for on the front brake?


i told those ppl to put in 35psi and they put 39 in.. good thing i checked..

 

It's to prevent you from putting your rear wheels on the front.

 

that's not entirely true.

It is to help you remove the brake rotors when changing them

when you remove the screw take off the spacer.

then screw the screw back in. This will push the rotor off the hub.

It's very helpful with rusty and stuck rotors.

 

We talking about the same thing? That bolt had maybe two threads on it. Don't see how it pushes against the hub. And why wouldn't that bolt be on the rear also if it was to push the rotor off the hub?

 

^^^???? I've never seen that on a rotor! mabye on a drum, because they can be a b!tch to get off sometimes but never on a rotor. I would have to agree that it's so you dont put the rear wheel on the front.
-GP-

 

I agree, the reason is the Fr/Rr thang...
It may be a secondary benefit,
but I've never had any trouble getting rotors off.

 

lol.. i asked about these before.. i'm not going to find my old thread but most people were talking about the not mixing up front and back tires..

btw.. my snow tires would not go on with those bolts so I had to take them out.. I was pissed for a second tirerack.com sent me wrong tires and then a woman told me about them.. boy was I embarassed.

 

Those screws are put in by the factory during assembly simply to help themselves out. After the car rolls off the line they can be removed and thrown away. If you ever get your rotors turned they will most likely toss them. Some major aftermarket companies dont even bother to put holes in for those screws, such as Project Mu.

 

Most have the screw hole in the back on the hub.
Fords have two so you can walk it off..

Try changing a rotor after 80K miles of new england weather and salt.
It's it one with the hub.

If you take the bolt off you will see that is actually made up of a bolt and a spacer.

 

Thats it's main purpose. Infiniti doesnt want somebody at a local tire shop putting the rear wheels on the front. The centers of the rim are actually different.

 

Since I want to rotate the wheels/tires for track days, what's the easiest way to take this screw off? I tried to crank on it a bit from the front but to no avail. Is it accessible from the back? TIA.

 

no, it's not accessible from the behind. remember, it's on the hub of the rotor... if you're having major difficulties removing the bolt, remove the rotor first and just lather it with wd-40 and a few cases of beer. you'll be set.

HansMoleman, have you tried removing the rotor from the hub with the aid of the bolt? i do understand what you are saying, but IIRC the bolt is actually very short to try to do so. besides, the rotor is not even fixed onto the wheel bearing hub by another bolt... it is actually fixed by the wheel. as for the spacer, sounds like a standard washer to keep the bolt in place.