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GTP4 4-Piston Cable Actuated Hydraulic Disc Brake Caliper Set, Hybrid Mechanical-to-Hydraulic Upgrade for MTB, eBike, Gravel - Post Mount, Pre-Bled with Finned Pads (Front & Rear)
The Juin Tech GT-P is a hybrid or cable-operated hydraulic brake that offers increased power and modulation without replacing the entire groupset. It is the lightest 4-piston brake caliper in the world and has outstanding braking performance.
GTP4 4-Piston Cable Actuated Hydraulic Disc Brake Caliper Set, Hybrid Mechanical-to-Hydraulic Upgrade for MTB, eBike, Gravel - Post Mount, Pre-Bled with Finned Pads (Front & Rear)
Item #: 38972083

GTP4 4-Piston Cable Actuated Hydraulic Disc Brake Caliper Set, Hybrid Mechanical-to-Hydraulic Upgrade for MTB, eBike, Gravel - Post Mount, Pre-Bled

Item #: 38972083

TTD 2589

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The Juin Tech GT-P is a hybrid or cable-operated hydraulic brake that offers increased power and modulation without replacing the entire groupset. It is the lightest 4-piston brake caliper in the world and has outstanding braking performance.
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What Stands Out

Powerful 4-Piston Design
The 4-piston mechanism ensures exceptional stopping power, providing cyclists with enhanced control and safety across various terrains, including road biking, mountain trails, and enduring e-bike rides.
Versatile Compatibility
Designed for multiple bike types, this brake caliper set fits seamlessly on road, mountain, cyclocross, gravel, and folding bikes, making it a versatile choice for diverse cycling needs.
Easy Cable Actuation
The cable-actuated design allows for straightforward installation and adjustment, catering to cyclists seeking a reliable, user-friendly braking solution without compromising performance on challenging rides.

Product Details

Explore a wide range of powerful Juin Tech GT-P 4-Piston hydraulic bicycle disc brake calipers on Ubuy Trinidad and Tobago. Perfect for Road, Mountain, Cyclocross, Gravel, E-Bike, Folding Bike, and more.

Who Should Buy?

Suitable For
  • Mountain Bikers

    Ideal for mountain bikers seeking powerful braking performance in challenging terrains and descents.

  • E-Bike Users

    Best suited for electric bike riders who need reliable stopping power for heavier loads and faster speeds.

  • Gravel Riders

    Perfect for gravel cyclists looking for versatility and strong braking on mixed surfaces and varying conditions.

Not Suitable For
  • Road Cyclists

    May be too powerful and unnecessary for casual road cyclists who don't require aggressive braking.

Product Description

GTP4 4-Piston Cable Actuated Hydraulic Disc Brake Caliper Set, Hybrid Mechanical-to-Hydraulic Upgrade for MTB, eBike, Gravel - Post Mount, Pre-Bled with Finned Pads (Front & Rear)

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Customer Questions & Answers

  • Question: What are the key features of the Juin Tech GT-P 4-Piston Cable Actuated Hydraulic Brake Caliper?

    Answer: The Juin Tech GT-P 4-Piston Brake Caliper boasts an advanced design featuring four powerful pistons that provide excellent braking force and responsiveness. Additionally, the hybrid cable-actuated system allows for smooth, modulation braking without the bulk of traditional hydraulic systems. This makes it highly suitable for both casual and performance cyclists looking for reliable stopping power in various terrains, from city streets to challenging trails.
  • Question: How does the cable actuation work in the Juin Tech GT-P brake caliper?

    Answer: The cable actuation mechanism in the Juin Tech GT-P allows the rider to pull on a cable, which then operates the hydraulic system within the caliper. This design provides the ease of use of mechanical brakes with the performance benefits of hydraulic braking. Cyclists can appreciate this setup, especially in conditions where quick response and adequate force are paramount, ensuring safety and efficiency during rides.
  • Question: Is it compatible with any bicycle model?

    Answer: Yes, the Juin Tech GT-P 4-Piston Brake Caliper is designed to fit a wide range of bicycle models, particularly those that accommodate disc brakes. Installation requires standard disc brake mounts and is versatile enough for road, mountain, and hybrid bikes. This compatibility makes it an excellent choice for cyclists looking to upgrade their braking system or replace existing calipers with a more powerful option.
  • Question: How does this brake caliper enhance safety while riding?

    Answer: The Juin Tech GT-P's powerful braking performance increases safety by providing riders with dependable stopping power, especially in emergency situations. With its 4-piston design, cyclists can achieve quicker and more controlled stops, which is essential when maneuvering through busy traffic or steep descents. This heightened sense of security can significantly improve the overall cycling experience and instills confidence in riders of all skill levels.
  • Question: What maintenance is needed for the Juin Tech GT-P brake caliper?

    Answer: To ensure optimal performance, regular maintenance is essential for the Juin Tech GT-P Brake Caliper. This includes inspecting the brake pads for wear, checking the fluid levels if applicable, and ensuring all components are securely fastened. Keeping the caliper clean from debris and dirt is also crucial. A well-maintained brake system enhances longevity and ensures consistent braking performance, essential for avid cyclists and those who ride frequently.
  • Question: Can I use this brake caliper for off-road biking?

    Answer: Absolutely! The Juin Tech GT-P 4-Piston Brake Caliper is designed to withstand challenging conditions, making it perfect for off-road biking. Its robust construction and powerful braking capabilities ensure it performs well on uneven terrains, downhill paths, or during hard stops. Whether navigating rocky trails or muddy paths, this brake caliper can provide the reliability and performance that off-road enthusiasts demand.
  • Question: What makes Juin Tech a reputable brand for bicycle brakes?

    Answer: Juin Tech is recognized for its commitment to innovation and quality within the cycling community. The brand specializes in hybrid braking systems that combine the benefits of cable actuation with hydraulic technology, appealing to cyclists looking for improved performance. With a focus on user feedback and continual improvements, Juin Tech products often receive positive reviews for their durability and effective braking, making them a trusted choice among riders.
  • Question: Are the brake pads included with the caliper set?

    Answer: Yes, the Juin Tech GT-P Brake Caliper Set typically includes high-performance brake pads designed to work seamlessly with the caliper. These pads enhance the braking efficiency and provide excellent modulation, ensuring a smooth ride. When purchasing, always check the product details to ensure you have all necessary components for installation, enabling you to hit the road or trails without delay.
  • Question: What tools are needed to install the Juin Tech GT-P brake calipers?

    Answer: To install the Juin Tech GT-P Brake Calipers, you'll need basic tools such as an Allen wrench set for mounting and adjusting the calipers, and possibly a torque wrench to ensure proper tightening. Having a disc brake alignment tool can also be beneficial for accurate installation. This process allows for a straightforward upgrade to your bike's braking system, ensuring maximum performance and efficiency with the right tools.
  • Question: Where can I buy the Juin Tech GT-P 4-Piston Brake Caliper Set in Trinidad and Tobago?

    Answer: You can purchase the Juin Tech GT-P 4-Piston Cable Actuated Hydraulic Bicycle Brake Caliper Set from Ubuy, a reliable online retailer offering a wide selection of cycling accessories. Ubuy provides the convenience of online shopping and is known for accommodating various payment options, making it easy for you to find the exact product you need in Trinidad and Tobago.

Juin Tech Editorial Review

The Juin Tech GT-P 4-Piston Cable Actuated Hydraulic Bicycle Bike Disc Brake Caliper Set is a high-performance brake set suitable for different types of bikes, including road, mountain, cyclocross, gravel, e-bike, and folding bike. It is easy to install and compatible with Shimano XTR/XT/Saint/Hone brake pads for replacement. The GT-P is an upgraded version of the Juin Tech M1, with four pistons compared to the M1's two pistons, meaning it provides more power and stopping force. The brake calipers are suitable for motorcycles, scooters or any bike compatible with Post Mount, but not for flat mount frames and forks. Changing the rotor size to 180mm or 203mm is possible, but requires careful selection of brake caliper spacers and retention bolts to align the calipers. Overall, the Juin Tech GT-P 4-Piston Cable Actuated Hydraulic Bicycle Bike Disc Brake Caliper Set is a great option for those looking to upgrade their bike's braking system. It is efficient, powerful and versatile, suitable for different types of bikes, and easy to install.

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Pros

  • More stopping power than M1
  • Compatible with Shimano XTR/XT/Saint/Hone brake pads
  • Suitable for different types of bikes
  • Easy to install

Cons

  • Not suitable for flat mount frames and forks

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Mohammad
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“Excellent quality and original too,when ubuy send original things I will appreciate that ,I very satisfied thank you”

23 July 2026 · via Trustpilot
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“The order and delivery progress was communicated very well. Package arrived within the estimated time. Products arrived as expected in good condition.”

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“Good supply of products. Safe payment methods, and shipment worldwide! Genuine products.”

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“Was my first time buying a product from Ubuy, but I found it so helpful. This is reliable. Gonna place a new order!”

22 July 2026 · via Trustpilot
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“Ubuy is a great online platform to buy stuff. Reliable, fast delivery time and great value for money. I've been using Ubuy online shopping platform for three years now and will continue to do so.”

23 July 2026 · via Trustpilot
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