Brakes are one of those things we don’t think much about—until they start squeaking, grinding, or feeling a little “off.” Most drivers know brake pads wear out and need to be replaced every so often, but what about the rotors? Do they need to be swapped out at the same time, or can you get away with just replacing the pads?
The short answer: sometimes you can change just the pads, but in many cases, replacing both the pads and rotors together is the smarter (and safer) move. Let’s look at when it makes sense.
Understanding Pads and Rotors
Your brake pads and rotors work as a team. Pads are the friction material that presses against the rotors (the round metal discs attached to your wheels) to slow the car down.
Over time, both wear down—pads thin out, and rotors can become uneven, grooved, or warped from heat and use. If either part is too worn, braking performance suffers.
When to Replace Both at the Same Time
1. If the Rotors Are Significantly Worn
If a mechanic tells you your rotors are grooved, warped, or below the manufacturer’s minimum thickness, replacing only the pads won’t cut it. New pads on damaged rotors will wear down much faster and won’t grip properly.
Think of it like putting brand-new running shoes on uneven ground—you won’t get the support or performance you need.
2. The “80% Worn” Rule
If your brake pads are worn down to 80% or more, and your rotors are close to their limit, most mechanics will recommend replacing both. It prevents you from having to come back in a few months for another brake job.
3. Deep Scoring or Uneven Surfaces
Sometimes rotors develop deep grooves or an uneven surface. Even if you put fresh pads on, they’ll wear unevenly against the rotor, reducing stopping power and creating vibrations in the pedal. Replacing both ensures smooth contact and reliable braking.
4. Preventative Maintenance
Even if your rotors aren’t completely shot, replacing them with the pads can be a smart preventative measure. It’s like changing both headlights when one burns out—you’re ensuring even performance and avoiding future hassle.
When You Can Replace Pads Only
If the rotors are still in good condition (no warping, deep scoring, or excessive wear), you can sometimes get away with just replacing the pads. This can save money in the short term.
But keep in mind, pads and rotors wear together, and mismatched parts can reduce braking performance. Always ask your mechanic to measure rotor thickness and inspect the surface before deciding.
A Real-World Example
One of our customers in Melbourne brought in a Camry with brake pads worn almost to the backing plate. The rotors looked okay at first glance, but closer inspection showed light warping. If we had just replaced the pads, the new ones would’ve worn unevenly within months. By replacing both, the customer left with brakes that felt brand new and wouldn’t need attention again for years.
Before You Book Your Next Brake Job
At the end of the day, brakes are all about safety. If your mechanic recommends replacing pads and rotors together, it’s usually for good reason. Fresh pads on fresh rotors mean smoother stops, longer life, and peace of mind every time you press the pedal.
So, when in doubt, think long-term—it’s your safety (and everyone else’s on the road) that depends on it.
If you are in Gowanbrae, and looking to sell your car, this is the best way to find us.
1/26 Acacia St, Glenroy VIC 3046
0437 773 905
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