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This article explains the pros and cons of hydraulic and mechanical disc brakes. I will also share my experience with both and recommend which ones to choose.
KEY TAKEAWAY
Hydraulic disc brakes are more effective and easier to use because you don’t have to apply as much force on the brake levers. They are also lighter and don’t require as often maintenance. On the other hand, they are more expensive than mechanical disc brakes. Still, I believe they are worth the higher investment, especially if you are a heavier rider and like to push your bike to its limits.
What Are the Pros & Cons of Hydraulic vs. Mechanical Disc Brakes?
The following table summarizes the pros and cons of hydraulic and mechanical disc brakes.
| Disc brake type | Pros | Cons |
|---|---|---|
| Mechanical | • More affordable • Less difficult to maintain • Are compatible with rim brake shifters | • Less effective and consistent • More difficult to control (require more force on brake levers) • Heavier |
| Hydraulic | • More effective and consistent • Easier to control (require less force on brake levers) • Lighter | • More expensive • More difficult to maintain • Are not compatible with rim brake shifters |
Braking Performance
The most discussed benefit of hydraulic disc brakes is their performance. Since the entire circuit is closed and the fluid controls the piston movement, frictional losses are eliminated. This means the pistons activate almost immediately when you press the brake lever.
At the same time, the brake force is applied more consistently, which results in a more predictable braking effect.
Mechanical disc brakes have a metal cable that’s being pulled when you press the brake lever. Due to cable bending and friction, you have to apply more force, and the cables wear out quicker, requiring more frequent maintenance (similar to rim brakes). The braking effect is also a bit less predictable.
Price
Mechanical disc brakes are more affordable. That’s why they are used on cheaper bikes suitable for beginners. You will have to pay a bit more for hydraulic disc brakes. This extra charge varies by brand. However, expect to pay roughly double the price.
Maintenance
Hydraulic brakes are almost maintenance-free. Thanks to the closed circuit, there is no risk of contamination by elements (water, dust, dirt, etc.). I’ve been using hydraulic disc brakes without active maintenance for more than six months without issues.
On the other hand, the brake pads are closer to the brake rotors (often less than 0.5mm from each side), which places higher demands on rotor and caliper alignment.
I often test different wheelsets, so I must adjust the brake calipers to avoid disc brake rubbing. But if you use one wheelset, you don’t need to adjust them as often.
Mechanical disc brakes are easier to repair due to their simplicity (you can get by with basic tools). However, they require more regular adjustments to ensure maximum performance.
Weight
Mechanical disc brakes are, on average, about 20% heavier than disc brakes. This is not a big deal in mountain biking because we are talking about a few dozen or hundreds of grams. However, road cycling weight weenies will probably choose hydraulic disc brakes for their lower weight.
Conclusion
I hope this article has helped you clarify the pros and cons of hydraulic vs. mechanical disc brakes. Once you try both, you will fully appreciate their differences.
Although you may think you don’t need hydraulics now, once you try them, you probably won’t return to mechanical ones.
But remember, one type is not better for all riders. It always depends on your riding style, needs, and budget. If you are a bikepacker who rides frequently in remote areas, mechanical disc brakes are the way to go. They are simple and easy to repair. But if you are a heavier rider who likes to push your bike to its limits in descents, effective braking power is a must.
