SlipStream 3D
Innovative 3D-Printed Cycling Components, Engineered for Performance, Precision, and Functionality.
Between The Arms (BTA)
Best Sellers
The SlipStream 3D UnderCup Between-the-Arms (BTA) Hydration System for the Giant Trinity Disc 2025 is engineered to position one or two hydration bottles neatly beneath your arm cups, creating a clean, integrated cockpit while keeping hydration easily accessible during training and racing.
Designed specifically for the Giant Trinity Disc 2025, the BTA System provides a rigid, secure mounting platform that eliminates bottle movement, even over rough roads. With adjustable stack height and multiple bottle positions, it can be tailored to suit your riding position and hydration preferences.
Whether you're racing a sprint triathlon, 70.3, or Ironman, the SlipStream 3D UnderCup BTA Hydration System provides a stable, aerodynamic solution that keeps hydration within easy reach while maintaining a clean, integrated cockpit.
Giant Trinity Disc 2025 UnderCup BTA Features
Designed for the Giant Trinity Disc 2025 (Triathlon Bike)
Purpose-built to integrate seamlessly with the Giant Trinity Disc 2025 cockpit, delivering a secure, factory-like fit.Dual Bottle Compatible
Supports one or two standard cycling bottle cages, giving you the flexibility to carry additional hydration for training or racing. All required mounting hardware is included. Bottle cages are sold separately.Aerodynamic Design
Mounts bottles neatly beneath your forearms to reduce frontal drag while keeping hydration within easy reach.Adjustable Stack Height
Supplied with three 10 mm spacers, providing up to 30 mm of stack adjustment to fine-tune your cockpit position. Additional spacers are available separately if more height is required.
Every rider's cockpit is unique.
If your setup isn't listed, we can design a custom UnderCup BTA System specifically for your bike. Simply visit our Custom Design page, complete the enquiry form, and we'll work with you to create the perfect solution.
⬇️ See the Additional Information section below for compatibility, sizing and setup instructions.
The SlipStream 3D UnderCup Between-the-Arms (BTA) Hydration System for the Cervélo P-Series is engineered to position one or two hydration bottles neatly beneath your arm cups, creating a clean, integrated cockpit while keeping hydration easily accessible during training and racing.
Designed specifically for the Cervélo P-Series, the BTA System provides a rigid, secure mounting platform that eliminates bottle movement, even over rough roads. With adjustable stack height and multiple bottle positions, it can be tailored to suit your riding position and hydration preferences.
Whether you're racing a sprint triathlon, 70.3, or Ironman, the SlipStream 3D UnderCup BTA Hydration System provides a stable, aerodynamic solution that keeps hydration within easy reach while maintaining a clean, integrated cockpit.
Cervélo P-Series UnderCup BTA Features
Designed for the Cervélo P-Series (Triathlon Bike)
Purpose-built to integrate seamlessly with the Cervélo P-Series cockpit, delivering a secure, factory-like fit.Dual Bottle Compatible
Supports one or two standard cycling bottle cages, giving you the flexibility to carry additional hydration for training or racing. All required mounting hardware is included. Bottle cages are sold separately.Aerodynamic Design
Mounts bottles neatly beneath your forearms to reduce frontal drag while keeping hydration within easy reach.Adjustable Stack Height
Supplied with three 10 mm spacers, providing up to 30 mm of stack adjustment to fine-tune your cockpit position. Additional spacers are available separately if more height is required.
Every rider's cockpit is unique.
If your setup isn't listed, we can design a custom UnderCup BTA System specifically for your bike. Simply visit our Custom Design page, complete the enquiry form, and we'll work with you to create the perfect solution.
⬇️ See the Additional Information section below for compatibility, sizing and setup instructions.
The Canyon Speedmax Mono-Extension BTA is a versatile hydration system designed specifically for the Canyon Speedmax's mono-extension setup. With adjustable height and dual bottle compatibility, this mount seamlessly integrates into your existing configuration for enhanced performance and convenience.
Key Features
Adjustable Height: Fine-tune the height for optimal positioning to match your aerodynamic and ergonomic needs.
Dual Bottle Capability: Supports two bottles, providing maximum hydration options for long rides or races.
Secure Mounting: Attaches directly to the existing Speedmax mono-extension, ensuring a stable and seamless fit.
Improved Straw Clip: Includes a straw clip that replaces the existing straw magnet, offering a more secure and reliable solution for straw placement.
Additional Notes
Updated Design: Please note that the design has been updated since the photos. Computer placement is no longer an issue, ensuring a more streamlined and efficient setup.
Behind The Saddle
(BTS)
Best Sellers
Engineered for the ISM 3.0 / 3.1 Saddle, this BTS system mounts securely to the saddle rails for a lightweight, aerodynamic solution. Designed for both single and dual bottle setups, it gives you flexibility to match your race or training needs.
Change your setup depending on your race – easily swap between single or dual bottles.
Sliding rail adjustability – fine-tune bottle placement for optimal reach and aerodynamics.
Tail light integration – Garmin and GoPro options available for clean rear visibility.
Aerodynamic & slim design – keeps bottles tucked neatly behind the saddle to reduce drag.
No bottle cages included – compatible with standard bottle cages.
Note: The dual system includes all components required to run either a dual or single bottle configuration.
Engineered specifically for the Selle Italia Watt Saddle, this BTS system mounts securely to the saddle’s existing mounting points for a lightweight, aerodynamic hydration solution. Designed for both single and dual bottle setups, it gives you the flexibility to change your configuration depending on your race.
Change your setup depending on your race – easily swap between single or dual bottles.
Sliding rail adjustability – fine-tune bottle placement for optimal reach and aerodynamics.
Tail light integration – Removable GoPro and Garmin options available for clean rear visibility.
Aerodynamic & slim design – keeps bottles tucked neatly behind the saddle to reduce drag.
No bottle cages included – compatible with standard bottle cages.
Note: The dual system includes all components required to run either a dual or single bottle configuration.
The Cervélo P Series Rear Bottle Mount is designed to fit the Cervélo P series with an integrated seat post mount, providing a secure and aerodynamic hydration solution. It allows for both single and dual bottle setups on the same mount, giving you the flexibility to adjust based on your needs.
The system also includes a removable light mount, compatible with Garmin quarter-turn mounts, GoPro adapters, and standard post-mount lights, ensuring visibility without interfering with your setup.
Key Features
💧 Single & Dual Bottle Setup – One mount supports both single and dual bottle configurations for added versatility.
⚡ Aerodynamic Design – Bottles are positioned under the saddle to minimise drag.
🔦 Removable Light Mount – Works with Garmin quarter-turn, GoPro, and standard post-mount lights.
🆕 Dual Vertical Stack Option – Now available with a dual vertically stacked bottle position.
📏 Shop drawings are included in the product photos to help you understand the sizing, mounting points, and setup options before ordering.
Note: You will need the OEM Cervélo Seatpost Water bottle Mount (see link below) for this system to install correctly.
No Bottle Cages are included.
Accessories
Best Sellers
The SlipStream 3D Adjustable Computer Mount provides a clean, highly adjustable way to position your bike computer within your aero cockpit.
Designed to mount beneath a compatible BTA bottle cage setup, the dual-pivot system allows you to fine-tune the height, angle and reach of your computer for improved visibility and a clean, integrated position.
Compatible with Garmin, Wahoo and Bryton computers, the modular design includes interchangeable arms and computer-specific mounting bases to suit a wide range of cockpit configurations.
Key Features
Dual-Pivot Adjustment
Independently adjust the computer angle and forward/rearward position to fine-tune placement.
Interchangeable Arm Lengths
Includes 20 mm, 30 mm and 40 mm arms to adjust height and reach. Longer options are available on request.
Garmin, Wahoo & Bryton Compatible
Available with interchangeable computer mounting bases to suit your preferred cycling computer.
BTA Integration
Mounts neatly beneath a compatible bottle cage for a clean, integrated aero cockpit.
Optional GoPro-Style Accessory Mount
Available with a removable GoPro-style mount for compatible lights, cameras or accessories.
What's Included
Mount base
20 mm, 30 mm and 40 mm arms
Selected computer mount
Mounting hardware
Bike computer, bottle cage, light and other accessories are not included.
The SlipStream 3D Bottle Cone is an aerodynamic accessory designed to streamline the leading profile of a standard cycling bottle, creating a clean, tapered shape at the front of your hydration setup.
Mounted beneath the bottle cage, the Bottle Cone integrates neatly into your existing setup while also providing a small storage compartment for used gel wrappers, nutrition or other ride essentials.
An optional straw opening allows a hydration bladder straw to pass through the Bottle Cone, making it ideal for custom BTA hydration configurations.
Key Features
Aerodynamic Profile
Creates a smooth, tapered leading profile in front of your bottle for a cleaner, more integrated hydration setup.
Integrated Storage
Features a small internal storage compartment, ideal for gels, used nutrition wrappers or other small ride essentials.
Optional Hydration Straw Opening
Available with an optional opening to route a hydration bladder straw neatly through the Bottle Cone.
Universal Compatibility
Mounts beneath a standard bottle cage, making it suitable for a wide range of compatible BTA and cycling hydration setups.
Simple Installation
Installs directly beneath the bottle cage for a clean and secure fit.
Bottle and bottle cage are not included.
Keep your nutrition exactly where you need it with the SlipStream 3D Bento Cone—an aerodynamic storage solution designed to mount directly to your Between-the-Arms (BTA) hydration system.
Developed specifically for triathletes and time trial riders, the Bento Cone provides secure, easy-to-access nutrition storage while maintaining a clean, integrated cockpit. Positioned within the airflow between your forearms, it offers a more aerodynamic alternative to traditional top tube bento boxes, keeping your gels within reach without disrupting your riding position.
Whether you're racing a sprint triathlon, 70.3, Ironman or tackling long training rides, the Bento Cone keeps your nutrition organised, protected and ready when you need it.
BTA Bento Cone Sizes
Choose the capacity that best suits your racing and training requirements.
Small
Holds approximately 4 Precision Fuel & Hydration PF 30 Gels
Ideal for sprint and Olympic-distance racing.
Medium
Holds approximately 7 Precision Fuel & Hydration PF 30 Gels
Perfect for longer races and most 70.3 events.
Large
Holds approximately 10 Precision Fuel & Hydration PF 30 Gels
Maximum storage for Ironman racing and long endurance sessions.
Capacities are approximate and based on Precision Fuel & Hydration PF 30 Gels. Capacity may vary depending on the size and shape of other nutrition products.
