Views: 0 Author: Site Editor Publish Time: 2021-09-26 Origin: Site
Disc brakes are safety-critical automotive components that must meet stringent cost and environmental requirements. Drivers often assess the performance of a vehicle's braking system based on the "feel" of the brake pedal. This is one of the first customer touch points during the driving experience and, as such, can be an important factor in quality perception and customer appeal. Brake pedal feel depends on the synergistic influence of the brake system performance and the subjective driver perception related to the quality of brake pedal feel. Brake pedal feel provides the driver with an understanding of the braking power and braking performance of the vehicle. Of significance here is the fact that brake pedal feel is clearly influenced by the properties of the brake friction material, such as the compressibility of the friction material. This is reflected in the size of the braking devices we manufacture.
How to check rotor size？
What are the sizes of brake discs for different uses?
Why do cars with four-wheel disc brakes use different size brake rotors on the front axle than on the rear?
For a given model, there are usually multiple rotor and shim sizes available. These sizes are not interchangeable and you must choose the right size to fit your vehicle. The specific rotor size may depend on your interior (sub-model), the vehicle's country of origin, sport/performance package, transmission type, engine size, and many other options. Confirming the proper fit can be tricky, so we've come up with some suggestions to help you.
Start by checking the supplier's catalog fitting instructions. Unfortunately, parts catalogs are often incomplete and may not list your model.
Call your local wheel dealer and ask for the original rotor size or OEM rotor/shingle part number based on your vehicle's number (which is mentioned in your title documents). The dealer may not tell you the rotor size, but will provide you with the actual part number of the vehicle. You can then use those part numbers to shop at other sources. However, if your car is later upgraded with HD / Performance brakes, the dealer will only know your original factory configuration and will not know about this upgrade.
The practical way to do this is to actually measure the rotor OD and then match it to the characteristics listed for the replacement. A good supplier should provide documentation on their nominal rotor size and type and will usually provide these values upon request or on their website. Note that this is a manual check and requires some effort, as you will need to remove the wheel to measure the distance from edge to edge of the rotor through the center of the rotor.
Keep in mind that in most cases, the vented and solid rotor options are not interchangeable. For example, if your car has solid rear rotors, then you will have to upgrade the calipers before you can install the vent rotors.
Rotors are as small as 140mm in diameter for regular bikes and cross-country specific bikes, and up to 205mm for mountain bikes. Typically, road and motocross use 140 to 160mm, mountain bikes use 160mm, cross-country skiing uses 160 to 180mm (sometimes a mix, with larger rotors up front), and larger vans use 180mm, or even 200 to 205mm. Larger rotors can dissipate heat over a larger surface area, but are heavier, so you need rotors that can match the smallest minimum rotor compared to the usual riding style.
The rears are almost always smaller because they almost always do less work than the front brakes. Brake discs are sized according to the amount of heat they are designed to generate and dissipate. When a car is braking hard, the load on the front tires increases significantly. If you are not familiar with this, it happens because the braking force occurs when the tires are pushed against the pavement, but the center of mass of the vehicle is located 2'-4' above the sidewalk. This produces what is called a rotational moment that is equal to the applied braking force multiplied by the distance from the pavement to the center of gravity. By generating a greater upward force on the front wheels and a downward force on the rear wheels (a reduction in normal gravity), the car can resist rotation. This is called weight transfer and results in higher traction at the front and lower traction at the rear. This results in greater energy dissipation at the front, more heat generated at the front, and the need for larger front brakes.
Make sure to monitor your particular car. Much will depend on how your car is driven and whether the tires are rotated regularly and evenly. Also, brake pads will last longer if you have a lot of manual transmissions and low gears rather than slamming on the brakes. If you have steep, steep hills on your daily commute, the brake pads may wear out more quickly. I'm sure you have a better understanding of these issues, so contact us for service!
