For motorcycle riders, the braking system is undoubtedly crucial. When braking performance declines and the brake disc needs to be replaced, correctly identifying the brake disc size becomes a link that cannot be ignored. The wrong size can cause installation issues, and poor braking performance, and may even threaten riding safety. Therefore, this article will walk you through a few key steps to help you determine exactly what size motorcycle brake disc you need to replace.
First, you should consult your motorcycle owner’s manual. Owner’s manuals will often contain detailed information about your braking system, including brake rotor dimensions and specifications. This is the most direct and reliable method of obtaining accurate dimensional information.
If you don’t have an owner’s manual or the manual doesn’t provide enough information, you can check the labels or markings on your existing brake rotors. Some brake discs may have dimensional information or a specific model code printed on them. In addition, you can also observe the diameter and thickness of the brake disc and whether it has special holes or grooves. This information is very important in determining the brake disc size.
Below you will find the measurements needed when ordering a custom made brake disc from MPM. The letters (A-F) in the figure represents each of the measurements in the order form.
A : Disc diameter
B: Center hole diameter
C: Bolt pitch diameter
D: Bolt hole sizeDisc thickness = 5 mm
E: Swept height
F: Offset
No: Number of bolts
If none of the above methods are able to obtain accurate brake disc dimensions, you can use a measuring tool to measure it. Use a tape measure or calipers to measure the brake rotor diameter and thickness, making sure the measurements are accurate and recorded. Please note that the brake disc must be in clean and undamaged condition when measuring to obtain the most accurate results.
If you’re still unsure about brake disc size, or want more professional advice, it’s best to consult a motorcycle repair shop or brake system manufacturer. They can give you an accurate brake disc size recommendation based on your motorcycle model, year, and specific needs.
In addition to size, the type and pattern of the brake disc are also factors to consider. Different types of brake discs (such as floating or fixed) have different performance and installation requirements. At the same time, the pattern will also affect the heat dissipation performance, friction coefficient and beautiful appearance of the brake disc. Therefore, when choosing a brake disc, these factors should be considered to ensure the best braking effect and riding experience.
Finally, be sure to choose regular brands and channels to purchase brake discs. High-quality brake discs not only provide greater safety and durability, but also provide better braking performance and riding stability. When purchasing, be sure to check the brake disc’s manufacturing quality, materials, and compliance with relevant standards and certifications.
In summary, determining the size of your motorcycle brake disc is an important step before replacing the brake disc. By consulting your manual, inspecting your existing brake rotors, taking measurements, consulting a professional, and selecting the appropriate brake rotor type and pattern, you will be able to find the best brake rotor for your motorcycle to ensure riding safety and performance. Remember to follow proper installation procedures when replacing brake rotors to ensure proper operation of the brake system.
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