it seems all rotors you buy dont last long, the problem is that you need to have the rotors turned on the car, even a brand new rotor needs to be matched to the hub, by spacers or by turning them while on the car

using A ON-Car brake lathe, the rotor will be true, with no run-out

if your just popping on a rotor from parts store, it will feel warped in no time, because the hub has run-out, so did the new rotor..

find a local shop that has a on-car brake lathe, have them turn your rotors,

make sure calipers are not dragging, and work properly, replace if needed

Let'* face it, you go to an auto parts store, and tell the guy, you want new rotors....he can give you a wide price range from 20-100+ bucks...chances are you will buy the 20 dollar ones, and pay for it down the road....I have put new rotors on a vehicle, and had a pulsation from the get go.....quality, and storing rotors really counts....

It'* the same when you call around for a brake job.....the competition is fierce out there....they try to outbid their competition...one way to do that is using cheap rotors and pads, that can cause early failure.....Say you have a Toyota, and you are calling around.....you call a Toyota dealership and ask them if they can beat your lowest bid.....they may say sure, by not using Toyota parts, to get the job....

But it makes no difference what parts you use, if rotor runout is present....it has to be 0.002 or less....if more than that , a pulsation can occur.....not right away, but easily within a year....

There are some vehicles out there that can only use on car lathes......but there are still many, that use regular rotors....so if you drive normally, and installation procedures can be eliminated, but are having early pulsation problems, chances are you have a runout problem.....