When replacing your vehicle’s brake pads, should you replace the front and rear pads at the same time?
70/30 Braking Rule
Vehicle brake systems are designed for the front brakes to do about 70% of the braking to stop the car. The rear brakes do the rest. Because the motor adds more weight to the front of most vehicles, more stopping ability is needed to reduce the stopping distance.
Rear brake pads have two functions: to help stop the vehicle and to keep its rear from rising when braking.
Anyone who has ridden a bicycle understands this. When you apply the front brakes, the front tire goes down to stop the bike. The rear tire rises due to the forward momentum of the bike. The rider and the bicycle can fall due to this unstable condition.
The same thing happens in a vehicle when the rear brakes stop working. The driver risks an uncomfortable and unstable situation.
Why Change Front & Rear Simultaneously
If rear brake pads perform only 30% of the work, why change them at the same time as the front brake pads?
In almost all cases, rear brake pads and rotors are smaller than those in the front. Smaller rear brake pads wear out at the same rate as front brake pads.
Some manufacturers require all four sets of pads (one set per wheel) to be replaced at the same time. Changing all four sets of pads at the same time optimizes the vehicle’s braking capacity. The brakes are the second most important safety feature of any car or truck after the driver. It’s critical to keep them in top shape.
80% Worn Rule
To determine if pads need replacing, measure the remaining thickness using special measuring tools. These tools measure the thickness while the brake pads are still in the caliper. However, If you remove the pads, use a small ruler or tape measure.
Replace a brake pad if the thickness is 20% or less of the new pad. With 80% of the pad worn away, the pad’s effectiveness is significantly reduced. You want to avoid this, especially in an emergency stop.
About Goodyear Brakes
Goodyear Brakes manufactures premium quality brake bundles, calipers, rotors, brake pads and all the hardware required to successfully install brakes, all backed by a national warranty, decades of production experience and one of the best-known names in automotive excellence. The brake pads are manufactured in the USA using a proprietary green production process by a company with more than 50 years of experience in friction science. The Goodyear Brakes product line is available through Goodyear Brakes at Amazon, CarID, Buy Brakes and AutoAnything.
Goodyear (and Winged Foot Design) and Blimp Design are trademarks of The Goodyear Tire & Rubber Company used under license by FDP Virginia Inc., 1076 Airport Road, Tappahannock, VA 22560, USA. Copyright 2020 The Goodyear Tire & Rubber Company. Goodyear Brakes and FDP Virginia are not responsible for its products when they are subjected to improper applications, installation, or accident.
How do you know when to change your brakes? A general rule of thumb is to replace your brake pads every 35,000 miles — but