I searched and some say rotors must be changed at the time of pad replacement due to their softness.

I measured the rotors today and the measurements are almost new (21mm front, 10.5mm rear)

I'm thinking of getting Hawk HPS pads, if that makes any difference.

do i have to get a new set of rotors? they are about 2 years old.

 

No, no need to get new rotors..... New pads will break in as you use them, and it doesnt take very long, just don't do any panic breaking or track runs or driving in rain storms same day.

 

as long as the numbers are above the min you are good to go with the rotors you have. I do encourage you to think about Carbotech pads, they will not eat your rotors like other pads and it would suck to need to change rotors 1/2 way though a set of pads. Just my 2 cents.

 

does non-ceramic pads like Hawk HPS eat through rotors too?

 

Carbotech is the only pad on the market not using iron in it's pads. It's the iron in other pads that builds heat, ceramic or not, and eats rotors. Carbotech pads also transfer less heat to the rotor adding miles to the life of the rotor. Heat is bad for rotors.

 

ah i see.. i guess im gonna go with carbotech then thanks!

 

I was under the impression that although you do not have to replace the rotors when you change your pads, it is a good idea to get them turned before you install the new pads. I have always replaced both the pads and rotors at the same time though. Like was said before, I think it'd be a pain to replace the rotors halfway through a set of pads.

 

My honest opinion is that Hawk pads work very well for me. My thought is that they would work for you too. I'm not a vendor of Hawk pads just a satisfied user of them & make no money if you buy them. Not affiliated with them in any way, yadda yadda yadda.....

If you read up on the Carbotech site they want you to use them on new rotors. From what I understand the Carbotec's are a good pad, but the requirement to use them only on new rotors or rotors that have only had Carbotech pads on them makes them a no go for me.

 

I too agree with the Carbotech pads. They are awsome.
Low dust and excellent stopping power. Very rotor friendly.

I have them front and back (Bobcat 1521) only &118.00 - 122.00 a set.

The higher sets are for racing and DUST A LOT.
AX6 XP8 XP10 XP12 XP16

But then again you are racing with thises pads and brakes a important not clean rims.

http://www.ctbrakes.com/pads/mini.htm

 

ScottLes, IMO if you need to turn your rotors you should recycle them & buy new ones. It is awful hard to say reuse or replace without seeing the rotors. Under normal use I would bet one could get by with reusing the rotors once. Next set of pads I'd definitely replace them.

EDIT.... If you track your car then everything should be new.

 

He is correct but you could also have your rotors cut (resurfaced) and you would not need new rotors.
Plus you should ALWAYS have your old rotors "cut" if you are installing new pads and not replacing the rotors with brand new ones.

With the thinkness of your roters you should be fine no matter what pad you choose as long as you get your rotors cut (resurfaced).

I dont get any $$ from Carbotech either. (I wish I did )

 

If you cut your rotors you increase the chance that they will warp. Especially if you use your brakes hard. That is the reason I choose to replace rotors when needed rather than turn them.

Rather than money, I'd be happy to test some free pads so I can join the Carbothech club.

 

A couple thousanths wont cause them to warp.

I would love some free carbotech stuff also.

 

OK, let's address a few of the above issues.

New rotors or turn the old ones. With customers that have the budget for a new set of rotors is always best with new pads. If the rotors can be turned and still be well within the numbers that is the next best way to go and a must with ONLY the Bobcats.

Why you may ask, I'm glad you did, Check out http://www.autoxcooper.com/carbotech..._pads.html#faq for all the details, but heres the bottom line, ALL other pads use iron in the pad mix and that iron corrupts the rotors and the Bobcats without the iron find it very hard to break thru the layer of old pad residue. This is another reason why our customers can run CT track pads on the same rotors as the Bobcats. This also keeps rotor temps lower and reduces the risk of wrap.

Crashton, once the Hawks are done, I hope you will try the CT pads, I think you like many Hawk fans will feel the improvement and run the risk of becoming a fan boy.

Carbotech is a small family run company without too much swag, I don't even have a t-shirt .

 

Is there a "rotor thickness alarm"? How would you know they needed replacing halfway though a set of pads?

If the rotors are very smooth, I would say it's ok to not turn them. If they aren't then get them turned.

 

In my experience every time I've had a rotor turned I've managed to have them warp like a potato chip. Could be my driving style or the fact that those rotors were on flintstonemobile type cars. Remember I'm an old fart & only recently have had cars with modern braking systems.

Well if the stars & planets align just right I will try them. I'm waiting until I need new rotors. Might be a year or so depending on track days.

Is there a "rotor thickness alarm"? How would you know they needed replacing halfway though a set of pads?

No thickness alarm. You need to find out what the spec is for the rotor & measure it with a micrometer.

If your rotors are grooved I'd recommend replacement. No way would you want to have rotors that won't last at least as long as your pads.