North Sonar UHM Carbon Mast 85cm – Ultra-Stiff Performance Mast for Speed and Control

The North Sonar UHM Carbon Mast 85cm is a premium high-modulus foil mast engineered for riders who demand maximum stiffness, reduced drag, and precise control across all foiling disciplines. Designed with cutting-edge carbon construction and a refined hydrodynamic profile, this mast is ideal for hydrofoil surf wing, wing foiling, foil surfing, and wind foiling.

Built for performance-focused riders, the 85cm length strikes the perfect balance between maneuverability and clearance, making it one of the most versatile mast sizes in modern foiling setups.

Ultra High Modulus Carbon Construction for Maximum Stiffness

At the core of the Sonar UHM mast is its advanced High Modulus Prepreg Carbon construction, delivering exceptional rigidity and responsiveness. This material significantly increases both bending and torsional stiffness compared to standard carbon masts.

The result is:

• Immediate feedback underfoot
• Precise control at high speeds
• Efficient energy transfer during pumping

This stiffness is especially beneficial for advanced riders pushing performance boundaries in wing foil and foil surfing, where even minor flex can affect control and efficiency.

Impossibly Thin Profile for Reduced Drag

One of the standout innovations of this mast is its ultra-thin hydrodynamic design. The submerged section is over 15% thinner than standard carbon masts, significantly reducing drag.

Benefits of the thinner profile:

• Higher top-end speeds
• Smoother glide through the water
• Faster acceleration onto foil
• Increased efficiency in all conditions

This low-drag design makes the mast particularly effective for high-performance wind foiling and fast wing foiling sessions.

Optimized for Wing Foiling and All Disciplines

The 85cm version is specifically tuned to perform across all foiling disciplines, with a special emphasis on wing-powered riding.

Unlike shorter masts designed for prone or pump foiling, the UHM 85 features a slightly longer chord length in the submerged section. This helps generate forward drive when edging against the wind—essential for wing foiling and wind foiling.

Ideal disciplines:

• Hydrofoil surf wing riding
• Wing foiling freeride and freestyle
• Foil surfing in waves
• Wind foiling in powered conditions

This versatility makes it a go-to mast for riders who want one setup for multiple foiling styles.

Advanced Hydrodynamic Efficiency

The Sonar UHM Carbon Mast features a carefully refined underwater shape that minimizes turbulence and maximizes flow efficiency.

Hydrodynamic advantages:

• Reduced surface friction for smoother rides
• Increased glide and pumping efficiency
• Cleaner water release for higher speeds

Additionally, North has engineered the mast to significantly reduce ventilation, ensuring consistent performance even in choppy or aerated water.

This is particularly important for maintaining stability during aggressive turns or high-speed runs.

Increased Stability and Control in Choppy Conditions

The 85cm mast length provides excellent ride height, offering enough clearance to handle waves and chop without compromising control.

Compared to shorter masts:

• Better handling in rough water
• Increased margin before breaching
• More consistent ride in dynamic conditions

At the same time, it remains more maneuverable than longer race-oriented masts, making it ideal for everyday riding and progression.

GeoLock System and Compatibility

The mast integrates seamlessly with the North Sonar system using the GeoLock tapered geometry connection, ensuring a strong and efficient load transfer between components.

Compatibility features:

• Works with Sonar carbon and alloy fuselages
• Industry-standard 165x90mm mounting pattern
• One-piece design for durability and strength

This modular compatibility allows riders to easily upgrade or customize their foil setup.

Technical Specifications

Specifications based on manufacturer data.

Key Features Overview

• Ultra High Modulus carbon for maximum stiffness
• 15% thinner profile for reduced drag
• Optimized for wing foiling and all disciplines
• Improved glide and pumping efficiency
• Reduced ventilation for stable performance
• Strong, durable one-piece construction
• Compatible with the North Sonar modular system

Ideal Riders and Use Cases

The North Sonar UHM Carbon Mast 85cm is best suited for riders looking to upgrade performance and efficiency.

Ideal for:

• Intermediate to advanced riders
• Wing foiling progression
• High-speed freeride and carving
• Downwind and pump foiling
• Wave riding and freestyle

Not ideal for:

• Beginners needing maximum stability
• Extremely shallow water conditions

Performance Benefits in Real Conditions

When riding in real-world conditions, the UHM 85 mast delivers a noticeable performance boost.

On the water, riders will experience:

• Faster take-offs and smoother lift
• Greater control at speed
• Enhanced carving precision
• Reduced fatigue due to improved efficiency

Its balance of stiffness, length, and hydrodynamics makes it a top choice for modern hydrofoil surf wing setups.

Why Choose the North Sonar UHM Carbon Mast 85cm?

This mast stands out due to its combination of advanced materials, innovative design, and versatile performance.

Top reasons to choose it:

• Industry-leading stiffness for maximum control
• Ultra-low drag for speed and efficiency
• Perfect balance between height and maneuverability
• Reliable performance across multiple disciplines

It is a premium upgrade for riders serious about improving their performance in wing foil, foil surfing, and wind foiling.

Final Thoughts

The North Sonar UHM Carbon Mast 85cm is a high-performance mast designed for riders who want to push their limits on the water. Its ultra-stiff carbon construction, reduced drag profile, and versatile 85cm length make it an essential component for advanced foiling setups.

Whether you’re carving waves, boosting speed, or exploring long-distance glides, this mast provides the precision, efficiency, and control needed to excel in all foiling disciplines.