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weight up front; a newer, lighter-weight, front-wheel-drive car may have up to 80 percent of its total weight there. And that means higher temperatures for. that car’s front brakes.
Another Reason is the change in size of braking components. Rotors are now made smaller to reduce weight, but that also gives a smaller surface from which to lose heat. Some rotors aren’t even ventilated, which would allow cooling air to pass through.
• What are the other advantages of semimetallic pads?
On cars with the higher braking temperatures the semi-metallics will give longer life, better brake balance and improved fade resistance.
• If my car has asbestos pads, can I replace them with semi-metallic pads?
This generally is not a good idea, but under severe conditions where high temperatures are present, they may improve overall performance. But it’s still best to use whatever the vehicle manufacturer suggests.
Be sure that the high-temperature symptoms are not caused by another problem in the system before you do install new pads.
• Why are some semi-metallic pads more expensive than others?
1. The longer the metallic fibers are in the pads, the., better the strength of the final product and the higher the cost.
2. Some low-cost semi-metallic pads are made with the same basic compounds as the asbestos pads (with semi-metallic material in place of the asbestos) and don’t include the special resins and modifiers of better semi-metallic pads. This results in poor pad life, noise problems and a generally inferior product.
3. Quality manufacturers recommend additional production, testing and inspection operations that other suppliers forego to reduce their final costs. Leaving out qualitycontrol steps ultimately affects the overall quality and price.
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