My car has only 15,000 miles and I bought drilled and slotted rotors. I am not really sure why I don't want to change the pads especially since the OEM pads are so heavy with dust but is it necessary to change pads when I change the rotors? And maybe I am being lazy since I spent so long yesterday installing the Mina Gallery full system. I will say that is a pain to install for something so simple.

 

If it were me I would replace them with Porterfields. There is a thread somewhere with a table showing the new and minimum pad thicknesses you might find/check before making a decision.

 

It's a good idea to replace the brake pads if the discs are being replaced so an even wear pattern is established between the pads and discs. Discs and pads should be replaced in axle sets.

Minimum pad friction material is 4mm to avoid having to replace the wear sensor.

 

While you have the wheels and rotors off, you’ve done the hard part. I don’t see a down side to changing the pads while you are at it.

 

I guess it wasn't that it was more difficult but rather the OEM pads are still good for another 30k. It is true the OEM are horrible with dust so I will just order new pads. It seems the Porterfield R4-s seem to the route most go. Is there a cheaper place anyone suggests to get them? I know Velocity has them but would think others have to have them cheaper. I bought R1 Geomet rotors and I know they have their pads they claim are good but I have no experience with them.

 

I bought mine direct from Porterfield.

 

I bought mine from LPI Racing over four years ago now, see here: https://www.lpiracing.com/store/pc/s...r=2015&submit=
They were the cheapest I could find at the time but you may find cheaper elsewhere.
For a 2016 R you want AP 1750 for the front and AP 1753 for the rear.
Go to the second page of the linked page for the 1753s.
Remember to check the R4-S and not the R4, R4-1 or R4-E.

 

Yeah I'm no expert but I'd been told it was critical to have new pads with new rotors otherwise the old rotors will put uneven wear on your new rotors.

 

I've always replaced pads & rotors independently. (at different mileages)
I DO measure rotor thickness with each pad change to assure they are over the minimum.

Doesn't the bed-in procedure establish the even wear pattern?

(I understand that a shop might replace pads & rotors together to reduce call-backs)

 

I reckon you should have zero problems putting used pads on new rotors providing you check/do three things:
1. The used pads are in good nick and still have plenty of meat on them.
2. You level off / scuff back / deglaze the surfaces of the pads to get them clean, flat, even and free of any previous wear pattern, in the past I have simply rubbed them on smooth concrete to do this and never had a problem.
3. You properly bed the pads to the new rotors.

 

I wouldnt. With those pads being so new and undamaged theyll seat just fine

 

The issue is typically putting new pads on old rotors (i.e. getting the old transfer layer off the existing rotors to bed in the new pads). Using older pads with new rotors is just fine. However, changing rotors is the hard part of a brake job. Since you are already there, throwing some new pads on isn't a bad idea.

 

Agreed. I always use a small sanding block to roughen both sides of the rotors a bit when changing pads, to aid in break-in.

 

FWIW, some manufactures will tell you if you can switch between their different compounds with issue (i.e. Carbotech). Even with that, I've never actually run into a problem changing pads on used rotors. I'm not suggesting there aren't any negative effects but I do think brake pad materials have advanced in this area since the guidance was made.

 

Again, the only issue would be regards reduced stopping power until the new pads bed-in.

In my younger days I had a near-miss or two on that first stop after pad replacement.
Experience helps....

 

Hence the mention about the newer materials. They don't appear to have the same limitations as back in the day. However, pad bed-in is also important. I always bed new pads in using an open parking lot until you get that nice brake smell.

 

I bought Porterfields from LPI recently and found them to have best price.

 

Thank you and everyone for their input. I ordered the Porterfield pads and will report back once everything is installed. And the OEM pads are so bad with dust, that alone should make me want to swap pads at that point.