PROMAX DB21-00DT140H-SL Hydraulic Disc Brake Rotor Set Bmx Sport S1

( Brand: Promax ), ( Manufacturer Part Number: DB21-00DT140H-SL ), ( Part Type: Disc Rotor ), ( Set Includes: Brake Set, Caliper, Rotor ), ( Brake Type: Disc Brake Hydraulic ), ( Color: Black ), ( Compatible Bike Type: Bmx Bike ), ( Material: Aluminum, Steel ), ( Country Of Origin: Taiwan )

Review PROMAX Hydraulic Disc Brake Set S1 Rotor Bmx Parts Black

The **Promax DB21-00DT140H-SL Sport S1 Hydraulic Disc Brake Set** paired with a **140mm Rotor** represents the pinnacle of performance and precision engineering, meticulously crafted for BMX riders who demand uncompromising stopping power, reliability, and responsiveness. Designed with the modern BMX enthusiast in mind, this hydraulic disc brake system combines cutting-edge technology with rugged durability to deliver consistent, high-performance braking across all terrains, from street grinds and flatland tricks to aggressive park riding and competitive racing. The **DB21-00DT** brake caliper features a sleek, aerodynamic design with a compact yet robust build, ensuring minimal weight without sacrificing structural integrity. Its **dual-piston hydraulic mechanism** provides superior clamping force and modulation, allowing riders to fine-tune their braking feel with precision whether they need a firm, progressive stop or a smooth, controlled deceleration. The **Sport S1** designation underscores its sport-specific tuning, optimized for riders who push their bikes to the limit, offering enhanced heat dissipation and reduced brake fade even under prolonged, high-intensity use.

The **140mm rotor** is a standout feature, offering an ideal balance between stopping power and weight savings. Its larger surface area maximizes friction and heat distribution, ensuring consistent braking performance even after extended sessions, while its lightweight construction reduces unsprung weight, improving overall ride dynamics and responsiveness. The rotor s **slotted design** enhances cooling efficiency, preventing overheating and brake fade during intense riding, and its **high-quality stainless steel construction** guarantees durability against the rigors of BMX riding, including impacts from jumps, grinds, and rough terrain. The system is compatible with Promax s **SL (Sport Line) brake mounts**, which are engineered for a clean, streamlined look while maintaining maximum rigidity and adjustability, allowing riders to fine-tune the brake s position for optimal leverage and clearance.

Under the hood, the **hydraulic system** is a game-changer for BMX riders, eliminating the need for cable maintenance and providing a more linear, powerful braking feel. The sealed hydraulic lines ensure consistent pedal-to-stop response, reducing the effort required to engage the brakes while delivering a more predictable and reliable stopping force. The **bleedable hydraulic system** allows for easy maintenance and adjustment, ensuring optimal performance over time. Whether you're a street rider executing precise stops on concrete or a park rider tackling technical features, this brake set delivers the confidence-inspiring performance needed to ride with aggression and control. Built to withstand the demands of competitive BMX, this system is not just an upgrade it s a necessity for riders who refuse to compromise on safety, performance, or the ability to push their limits.

**Pros and Cons of buying a Promax DB21-00DT140H-SL Hydraulic Disc Brake Set with Sport S1 Rotor for BMX**

1. **Performance and Power:** Hydraulic disc brakes offer superior stopping power compared to traditional rim brakes or mechanical disc brakes. The hydraulic system ensures consistent and strong braking performance, which is crucial for BMX riding where quick stops and control are essential.

2. **Durability:** Promax is a well-known brand in the BMX and bike industry, known for producing durable components. The hydraulic system is designed to withstand frequent use and high-stress conditions, making it a reliable choice for aggressive riding styles.

3. **Weather Resistance:** Hydraulic brakes are less affected by weather conditions like rain or mud compared to rim brakes. This makes them more reliable in various riding environments, especially if you frequently ride in wet or muddy conditions.

4. **Consistent Braking:** Hydraulic systems provide consistent braking power regardless of the rider s hand strength or brake lever position. This consistency is particularly beneficial for riders who need precise control during high-speed maneuvers or jumps.

5. **Compatibility with Sport S1 Rotor:** The Sport S1 rotor is designed to work seamlessly with the brake caliper. This combination is likely optimized for performance, offering better heat dissipation and durability compared to standard rotors.

6. **Reduced Rim Wear:** Since hydraulic disc brakes do not rely on rim friction, they minimize wear on the wheels, extending the lifespan of your rims and tires.

7. **Modern Technology:** Hydraulic disc brakes represent the latest technology in braking systems, offering a smoother and more responsive feel compared to older mechanical systems.

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1. **Cost:** Hydraulic disc brake systems are significantly more expensive than traditional rim brakes or mechanical disc brakes. The initial investment is higher, which may be a deterrent for budget-conscious riders.

2. **Maintenance Requirements:** Hydraulic systems require more maintenance than rim brakes. This includes regular bleeding of the brake lines to remove air, checking for leaks, and ensuring the brake fluid is fresh. Neglecting maintenance can lead to poor braking performance or system failure.

3. **Complexity:** Installing and adjusting hydraulic disc brakes can be more complex than other types of brakes. It may require specialized tools and knowledge, potentially necessitating professional help if you are not experienced with hydraulic systems.

4. **Weight:** Hydraulic disc brake systems are heavier than rim brakes. While the weight difference may not be significant for BMX, it could be a minor consideration for riders who prioritize lightweight setups.

5. **Potential for Fluid Leaks:** Hydraulic systems are prone to leaks if the brake lines or seals are damaged. Leaks can compromise braking performance and require immediate attention to avoid further damage.

6. **Learning Curve:** Riders transitioning from rim or mechanical disc brakes to hydraulics may need time to adjust to the feel and responsiveness of the new system. Over-braking or misjudging stopping distances could be a risk initially.

7. **Compatibility Issues:** Ensure that your bike frame and fork are compatible with disc brake mounts. Some older or budget BMX bikes may not have the necessary hardware, requiring additional modifications or upgrades.

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The Promax DB21-00DT140H-SL hydraulic disc brake set with Sport S1 rotor is an excellent choice for BMX riders who prioritize performance, reliability, and control. The superior stopping power, durability, and weather resistance make it ideal for aggressive riding styles, jumps, and technical tricks. However, the higher cost, maintenance demands, and complexity of installation may not be suitable for all riders, particularly those on a tight budget or with limited mechanical experience.

If you frequently ride in wet or muddy conditions, perform high-speed maneuvers, or simply want the best braking performance available, the investment in hydraulic disc brakes is justified. For casual riders or those who primarily ride in dry conditions, traditional rim brakes or mechanical disc brakes might be a more practical and cost-effective option.

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- You are an experienced rider who values performance and control.

- You frequently ride in challenging conditions (e.g., mud, rain, or technical terrain).

- You are willing to invest in maintenance and are comfortable with the added complexity.

- Your bike is compatible with disc brake mounts, or you are prepared to upgrade your hardware.

- You are on a tight budget and cannot afford the higher upfront cost or potential maintenance expenses.

- You lack experience with hydraulic systems and are not willing to learn or seek professional help for installation and maintenance.

- You primarily ride in dry, controlled environments where rim brakes or mechanical discs would suffice.

Details:

Missing some parts. Promax Hydraulic Disc Brake Set Sport S1 Rotor BMX PARTS Black 140mm Open-box hydraulic brake set. Only the parts shown in pictures are included.

part #: db2100dt140h prices

• $25.99-$35.40

specifications ribicycl:

• brand: Promax
• mpn: Db21-00dt140h-sl
• part type: Disc Rotor
• set includes: Brake Set, Caliper, Rotor
• brake type: Disc Brake Hydraulic
• color: Black
• compatible bike type: Bmx Bike
• material: Aluminum, Steel
• country of origin: Taiwan

payments ribicycl:

• wallet: Google-pay
• credit card: Mastercard
• other

offer ribicycl:

• availability: In Stock
• best offers: True
• started: June 1, 2026
• quantity: 1
• options: Ship-to-home
• sold: 0

general ribicycl:

• condition: For parts or not working
• Cycling > Bicycle Components Parts > Brakes

shipping ribicycl:

• transit: 3-8 Days
• cost: $9.97
• class: Standard, Expedited
• service: USPS Ground Advantage, USPS Priority Mail, FedEx Ground / FedEx Home Delivery
• type: Fixed
• carrier: USPS, FedEx

returns ribicycl:

• policy: Returns Accepted
• method: Money back
• time: 60 Days
• paid by: Seller

seller ribicycl:

• # reviews: 36106
• city: Neenah, Wisconsin
• rating: 100.0%

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