Need rotors - have to change pads?

You do not. Break-in will take a little longer with used pads.

Don

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No.......but for that matter, you don't "have" to install front rotors either.

yer welcome, ~:~ MarshMonster ~takes a toke..........wonders if you know the correct questions to ask, to get the answers you want~ ~:~

If the rotors are slightly grooved, the pads are also.

You will have very little pad surface on the rotor when you 1st put them in, and you'll stop, but it'll tend to overheat the rotor a bit. It may warp.

Worse, if the old rotor had any rust at the inner and outer edges (but still where the pad wears) the pads will be 'sanded back' at those edges, further reducing the amount of rotor that has to carry the heat load. The parts of the rotor not hit by the pads will quickly rust, and when you next put pads on, if you don't cut the rotors, those pads will be reduced in size as well.

Not something I've ever done, but you could sand (wet-sand) the pads on a flat block until they were flat.

If you just stick those pads on as is, with the grooves, it will never be quite right ubtil you put pads on and cut the rotors- assuming they haven't warped by that point.

Dave

We have had to cut new pads down with a belt sander on rare occasions. (This belt ran over a flat bed, so it was easy to keep everything true) For whatever reason, the new pad thickness would not allow the caliper to be mounted. The sanding operation did not seem to affect the life of the pads negatively.

Thanks for the help all! Gary

Hey, Dave, that is something I've done numerous times, using a flat broom-finished concrete paved store yard. It always worked well and gave full contact between rotor and pad immediately. (For those who have lapped heat sinks for computer processors, it's quite similar.) So, this makes the rest of the story. s