Last time, we covered "What are disc brakes?", so today let’s dig into the specific details required for actually installing them.
The very first thing to check is whether your bicycle can actually be fitted with disc brakes.
To install disc brakes, you need specific mounts on both the frame and fork that are different from those used for rim brakes.
Since installation is impossible without these, checking for them should be your top priority.
Lower left side of the front fork
Rear left end of the frame
If your fork or frame doesn't have one of these three types of mounts, you cannot convert it to disc brakes, in which case you would need to purchase a new frame or fork.
Next, let's choose the type of mechanism based on your intended use.
The mechanism refers to what actuates the disc brakes.
Broadly speaking, there are two types: "Mechanical" (cable-actuated) and "Hydraulic." There are also "cable-actuated hydraulic" systems, but that's a source of confusion, so we'll leave that aside for now.
First, "Mechanical."
This type operates by pulling and releasing a cable to move the disc brake pads, similar to how rim brakes function.
Next, "Hydraulic."
In this system, the lever and caliper are connected by a hose filled with oil, and the pads are moved using Pascal’s principle.
The pros, cons, and appropriate uses for each, roughly speaking, are as follows:
"Mechanical"
・You can use your existing brake levers by matching the specifications to those of rim brakes.
・Because they operate in a similar way to rim brakes, they are easy to install and maintain.
・They require fewer dedicated parts, making the initial cost lower than hydraulic discs.
・Using a rotor of the same size, they provide less stopping power than hydraulic systems.
"Hydraulic"
・Using oil to operate the system provides a very light lever feel.
・They deliver more powerful stopping force with less effort compared to "Mechanical" systems.
・They require dedicated, compatible components for the lever, hose, and caliper.
・Maintenance is more complex as it involves working with fluids like brake oil, which you may not be accustomed to.
These are the main points.
Once you have chosen the mechanism, let's confirm the necessary parts for the installation. The following parts are required (the points in parentheses are for when you are choosing them):
・Disc Caliper (The model depends on the mounts on your frame/fork.)
・Disc Brake Lever (You may not need these if using mechanical brakes.)
・Disc Brake Hub (These range in price from inexpensive to high-end.)
・Disc Rotor (Note that specifications change depending on the type of hub.)
・Disc Adapter (Whether or not this is needed depends on your bike and the chosen caliper.)
Since these are needed for both the front and rear, there is a fair number of parts to gather.
Now that we have confirmed the necessary items, the next step would be to decide on the specific components, but that would make this post too long, so let's stop here for today.
See you in the next installment.
Disc Brake Related Articles
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【PIT TIPS】Disc Brake Handbook Vol. 1 – The Pros and Cons of Disc Brakes –