17/09/2017
Ensuring your bicycle's braking system operates flawlessly is paramount for both safety and performance. However, achieving that perfect setup often hinges on one crucial, yet frequently overlooked, component: the brake mount. These unassuming brackets are the vital link between your brake caliper and your bike's frame or fork, dictating not only what type of brake you can use but also the size of your disc rotor. Navigating the world of brake mount standards can seem daunting, but understanding the options available is key to upgrading your system or simply replacing a worn component with confidence. This comprehensive guide will demystify the various brake mount types, helping you make an informed decision for your specific cycling needs.
At the heart of any effective braking system lies precision engineering. Our selection of caliper mounts is meticulously designed to integrate seamlessly with a wide array of brake systems, ensuring a secure and efficient connection. We understand that cyclists demand both performance and durability, which is why our mounts are crafted from T6 2014 alloy, a material renowned for its strength-to-weight ratio. Furthermore, each mount undergoes a rigorous CNC machining process, guaranteeing exceptional accuracy and consistent quality. This commitment to precision means that when you choose one of our mounts, you're investing in a component that's built to perform under the most demanding conditions, providing reliable support for your braking power.
Understanding Different Brake Mount Standards
The evolution of bicycle technology has led to the adoption of several distinct brake mount standards, each with its own design philosophy and intended application. Knowing which standard your frame or fork employs is the first critical step in selecting the correct mount. Our range covers the most prevalent standards, offering solutions for a vast majority of bicycle configurations, from mountain bikes to road bikes. Each bracket is designed with a specific purpose, ensuring optimal alignment and performance for your brake caliper and disc rotor combination. Moreover, for those who appreciate aesthetic coherence, most of our mounts are available in a choice of sleek black or classic silver finishes, allowing you to match your bike's existing colour scheme or add a subtle contrast.
74mm Post Mount (PM) Explained
The 74mm Post Mount, often simply referred to as Post Mount, is one of the most common brake mounting standards found on modern bicycle forks and frames, particularly prevalent in mountain biking. Characterised by two threaded posts that protrude directly from the fork leg or frame, spaced 74mm apart, it offers a direct and robust connection for many caliper types. However, there are scenarios where you might have an International Standard (IS) caliper that you wish to fit onto a Post Mount fork. This is where a specific adapter becomes indispensable. Our HBSM20H mount is engineered precisely for this purpose. It ingeniously allows International Standard calipers to be securely fitted onto 74mm Post Mount forks, bridging the gap between two different standards. An important consideration with the HBSM20H mount is that it necessitates the use of a disc rotor that is 20mm larger than what would typically fit directly. For example, if your fork is designed for a 160mm rotor with a direct Post Mount caliper, using this adapter would require a 180mm rotor to maintain proper leverage and clearance. It’s also crucial to note that this particular mount will not work with most Post Mount Marzocchi forks due to specific design variations unique to that brand. Always double-check your fork's specifications to ensure compatibility before purchasing.
International Standard (IS) Mounts
The International Standard (IS) mount is a venerable and widely adopted brake mounting standard, predating the widespread use of Post Mounts on forks. It is characterised by two unthreaded holes on the frame or fork dropout, spaced 51mm apart, to which an adapter plate is bolted, and then the caliper is bolted to the adapter. While many modern calipers are designed as Post Mount, IS mounts remain common on older frames and forks, as well as on the rear triangles of many contemporary bikes. We offer two highly versatile mounts specifically designed to enhance your braking capabilities on IS fittings: the HBIS20 and the HBIS40. These mounts are not merely adapters; they are designed to strategically lift the caliper, allowing you to accommodate larger disc rotors, thereby increasing braking power and heat dissipation. The HBIS20 mount facilitates the use of a disc rotor that is 20mm larger than your frame or fork's native IS setup would typically allow. For instance, if your IS frame is designed for a 140mm rotor, the HBIS20 would enable you to run a 160mm rotor. For those seeking even greater stopping power, the HBIS40 mount provides the clearance needed for a substantial 40mm increase in disc rotor size. This means a 140mm native IS mount could support a 180mm rotor, or a 160mm could support a 200mm rotor. These options provide significant flexibility for riders looking to upgrade their brake performance without having to replace their frame or fork. Both HBIS20 and HBIS40 are precision-engineered to ensure optimal caliper alignment and maximum braking efficiency.
Flatmount Standard (FM)
The Flatmount standard is a more recent innovation in disc brake mounting, primarily developed for road bikes, gravel bikes, and some urban models, where a more compact and aesthetically integrated caliper mount is desired. Unlike Post Mount or IS mounts, Flatmount calipers are designed to sit flush with the frame or fork, offering a cleaner look and often a slightly lighter setup. The mounting bolts pass through the frame or fork from the underside, threading directly into the caliper or an adapter. Our range includes dedicated mounts for the Flatmount standard, ensuring seamless integration for these modern setups. We offer specific mounts for Flatmount front 160mm and Flatmount rear 160mm configurations. This means if your road bike fork is designed for a 160mm Flatmount rotor, we have the precise mount to ensure your caliper fits perfectly. Similarly, for the rear of your bike, if it's set up for a 160mm Flatmount rotor, our dedicated rear mount will provide the ideal solution. These mounts maintain the clean lines and minimalist aesthetic that Flatmount systems are known for, while providing the robust and reliable connection essential for disc brake performance. Selecting the correct Flatmount adapter is crucial, as front and rear applications often have different bolt spacing and caliper orientations.
Key Considerations When Choosing Your Mount
Selecting the correct brake mount goes beyond simply identifying the standard on your frame or fork. Several other factors play a critical role in ensuring optimal braking performance and compatibility. Firstly, consider the disc rotor size you intend to use. Our mounts are versatile, accommodating rotor sizes ranging from a compact 140mm up to a powerful 220mm. Larger rotors offer greater stopping power and improved heat dissipation, which is beneficial for heavier riders, steep descents, or aggressive riding styles. Secondly, the caliper type you possess or plan to use is crucial. While some mounts convert between standards (like IS calipers to Post Mount forks), others are specific to one caliper type. Always verify your caliper's mounting interface. Thirdly, and perhaps most importantly, is matching the mount to your frame/fork standard. An incorrect match will either prevent installation or lead to dangerous misalignment. Our brackets are designed only for the purpose stated, ensuring a perfect fit when the correct pairing is made. Furthermore, the material and quality of the mount are significant. As mentioned, our mounts are CNC machined from T6 2014 alloy, offering exceptional strength and durability, vital for components under significant stress. Aesthetics also play a role; with options in black or silver, you can choose a mount that complements your bike's appearance. Lastly, for weight-conscious cyclists, it's worth noting that our mounts start from a mere 20g, contributing minimally to your bike's overall weight while delivering maximum performance. All our mounts are supplied with the necessary bolts for secure mounting to your frame or fork, simplifying the installation process.
Why Our Mounts Stand Out
Our commitment to providing a superior product is evident in every brake mount we produce. We pride ourselves on offering a wide selection that caters to most common and some less common brake system combinations, ensuring you can find the right fit for your unique setup. The precision engineering, highlighted by the use of high-grade T6 2014 alloy and advanced CNC machining, guarantees not only exceptional strength but also perfect alignment and durability. This meticulous manufacturing process ensures that each mount performs exactly as intended, providing a solid and reliable platform for your brake caliper. Furthermore, the convenience of having all necessary bolts supplied with each mount simplifies the installation process, getting you back on the road or trail quicker. From the lightest road bike setup requiring a 140mm rotor to the most aggressive downhill rig demanding a 220mm rotor, our range has been developed to cover a comprehensive spectrum of needs, always with an unwavering focus on quality and performance.
Brake Mount Compatibility Table
| Mount Type | Compatible Fork/Frame Standard | Caliper Type Accommodated | Disc Size Adjustment | Key Notes |
|---|---|---|---|---|
| HBSM20H | 74mm Post Mount | International Standard (IS) | +20mm larger disc required | Will not work with most Post Mount Marzocchi forks. |
| HBIS20 | International Standard (IS) | IS, or Post Mount with appropriate PM adapter | +20mm larger disc allowed | Lifts caliper for increased rotor size. |
| HBIS40 | International Standard (IS) | IS, or Post Mount with appropriate PM adapter | +40mm larger disc allowed | Provides maximum disc size increase. |
| Flatmount Front 160mm | Flatmount Front | Flatmount | Fixed at 160mm | Designed for compact road/gravel setups. |
| Flatmount Rear 160mm | Flatmount Rear | Flatmount | Fixed at 160mm | Ensures clean rear brake integration. |
Frequently Asked Questions (FAQs)
Q: How do I know which brake mount standard my bike uses?
A: The easiest way is to inspect your frame or fork where the caliper attaches. Post Mounts have two threaded posts directly on the frame/fork. International Standard (IS) mounts have two unthreaded holes on a flat surface, usually with 51mm spacing. Flatmounts are typically found on road/gravel bikes, where the caliper sits flush with the frame, and the bolts come from underneath. If unsure, consult your bike's manual or manufacturer's specifications.
Q: Can I use a different brand's caliper with your mounts?
A: Yes, generally. Our mounts are designed to be compatible with industry-standard caliper types (like IS or Post Mount calipers) and frame/fork standards. As long as your caliper matches the intended caliper type for the mount (e.g., an IS caliper for an HBSM20H mount), it should fit. Always ensure the caliper's specific model is compatible with the disc rotor size you plan to use.
Q: Why do some mounts require a larger disc rotor?
A: Mounts like the HBSM20H, HBIS20, and HBIS40 act as adapters that position the brake caliper further away from the hub. This increased distance is necessary to accommodate a larger diameter disc rotor. A larger rotor provides more leverage and surface area for braking, leading to increased stopping power and better heat dissipation, which is particularly beneficial for aggressive riding or heavier loads.
Q: Are the necessary bolts included with the brake mounts?
A: Yes, absolutely. All our brake mounts are supplied with the appropriate bolts required for mounting the bracket securely to your bike's frame or fork. This ensures you have everything you need for installation right out of the box, saving you the hassle of sourcing additional hardware.
Q: What if I have a Marzocchi Post Mount fork?
A: It's important to note that our HBSM20H mount, designed for fitting International Standard calipers to 74mm Post Mount forks, will not work with most Post Mount Marzocchi forks. Marzocchi forks often have specific design nuances around their post mounts that are incompatible with this particular adapter. If you have a Marzocchi fork, it's best to seek out a Marzocchi-specific adapter or consult with a bike mechanic.
In conclusion, selecting the correct brake mount is a critical step towards achieving optimal braking performance and ensuring the longevity of your bicycle's components. By understanding the distinctions between Post Mount, International Standard, and Flatmount systems, and considering factors such as disc rotor size and caliper compatibility, you can confidently choose the perfect mount for your setup. Our wide selection, precision engineering, and commitment to quality ensure that whether you're building a new bike or upgrading an existing one, you'll find a reliable and high-performing solution. Don't let an incorrect brake mount compromise your ride; choose wisely and enjoy the confidence of superior stopping power.
If you want to read more articles similar to Choosing Your Bicycle Brake Mount: A UK Guide, you can visit the Brakes category.