Modular Aluminum Foil Package | AF72 or AF85
North Sonar Foil Edition
A durable, versatile Sonar foil foundation that lets you select the front wing that matches your riding.
The North Sonar Foil Edition combines a refined aluminum mast, A700 aluminum fuselage and S270 carbon stabilizer in one modular package. Choose the maneuverable AF72 for shallower water and prone foiling, or the versatile AF85 for wing foiling, waves and everyday freeride. Add a compatible North Sonar front wing to create a foil tuned to your discipline, conditions and skill level.
- AF72 or AF85 mast
- A700 aluminum fuselage
- S270 carbon stabilizer
- GeoLock connection
- Modular Sonar system
- Travel bag included
Why Choose the Sonar Foil Edition?
Refined Aluminum Mast
The streamlined aluminum mast profile balances stiffness, durability and accessible performance. It is a practical choice for riders who want dependable Sonar performance without the higher price of a full carbon package.
GeoLock Connection
North’s load-bearing tapered GeoLock geometry locks the mast and fuselage together to create a direct, rigid connection with efficient load transfer and reduced unwanted movement.
Stable A700 Fuselage
The 700mm aluminum fuselage delivers predictable pitch stability and forgiving control. Its balanced length makes it suitable for learning, freeride progression, wing foiling and surf-oriented setups.
Responsive S270 Stabilizer
The thin, higher-aspect pre-preg carbon stabilizer balances control with responsive turning. Its design also helps the foil recover smoothly if the stabilizer briefly breaches the surface.
Choose Your Front Wing
A front wing is intentionally not included. This lets you pair the package with a compatible Sonar wing selected for early lift, speed, carving, pumping, surf or another specific riding goal.
Built for Progression
The package offers an accessible route into North’s modular Sonar ecosystem. As your riding develops, you can change the front wing or other compatible components without replacing the entire foil.
Mast Dimensions and Specifications
| Mast | Length | Minimum Thickness | Minimum Chord | Mast Weight | Best For |
|---|---|---|---|---|---|
| AF72 | 72cm / 28.3" | 18mm | 125mm | 2.23kg / 4.92 lb | Prone foiling, shallower locations, learning and riders prioritizing maneuverability |
| AF85 | 85cm / 33.5" | 18mm | 125mm | 2.48kg / 5.47 lb | Wing foiling, freeride, waves, chop and all-around use |
Construction: Both mast options use a refined 6000-series aluminum alloy profile and connect to the included AF Board Adaptor.
Which Mast Length Should You Choose?
Choose the AF72
Select the 72cm mast for prone surf foiling, shallower water or a more compact and confidence-inspiring setup. The shorter mast provides less leverage during falls and makes touchdowns and initial foil control feel more manageable.
- Best package option for prone and surf foiling
- Better clearance in shallow locations
- Easier for first flights and early progression
- Quicker-feeling roll response
Choose the AF85
Select the 85cm mast for the most versatile Sonar setup. Its additional ride height provides more room to bank through turns, cross chop and manage waves before the board or foil approaches the surface.
- Recommended for most wing foilers
- More clearance through waves and chop
- Allows deeper banking in powered turns
- Versatile across freeride, waves and progression
Our recommendation: Choose the AF85 for general wing foiling and an all-around quiver. Choose the AF72 when shallow-water access, prone foiling or easier early-stage control matters more than maximum ride height.
Aluminum Edition vs. Carbon Edition
| Package | Construction | Ride Character | Why Choose It? |
|---|---|---|---|
| Sonar Aluminum Foil Edition | AF aluminum mast, separate AF Board Adaptor and A700 aluminum fuselage | Stable, dependable and forgiving, with slightly more overall weight |
Best Value Choose it for durability, progression, hard everyday use and lower replacement costs. |
| Sonar Carbon Foil Edition | Pre-preg carbon mast with integrated plate and C700 carbon fuselage | Lighter and more performance-focused, with reduced swing weight and direct feedback |
Higher Performance Choose it when minimum weight, faster response and premium carbon construction justify the additional cost. |
The aluminum package is the sensible choice for learning, travel, school use and riders who value durability per dollar. The Carbon Edition is better suited to experienced riders seeking a lighter, more responsive setup.
Included Components
Included
- AF72 or AF85 aluminum mast
- AF Board Adaptor
- A700 aluminum fuselage
- S270 carbon stabilizer with cover
- Sonar Travel Bag
- Tool Kit
- Board Adaptor Screw Pack A: M8 x 40mm
- Fuselage Screw Pack B: M8 x 35mm screws and flat washers
- Stabilizer Screw Pack C: M8 x 16mm
Not Included
- Front wing
- Foil-to-board mounting screws
- Foil board
- Board leash or foil-specific safety equipment
You must add a compatible North Sonar front wing and the correct foil-to-board mounting hardware before this package can be used.
Compatibility Notes
- Designed for compatible components within North’s modular Sonar foil system.
- The AF Board Adaptor uses an industry-standard 165 x 90mm mounting pattern.
- The included AF Board Adaptor is designed for North AF-series aluminum masts.
- North Sonar components are not compatible with the AK Mast Series.
- Foil-to-board screws are sold separately because the required screw length depends on the board and track system.
- Confirm front-wing and component compatibility before combining parts from different Sonar generations.
Rinse all aluminum components and hardware thoroughly with fresh water after saltwater use. Allow the foil to dry before storage, and periodically separate, clean and protect threaded connections according to North’s maintenance instructions.
Frequently Asked Questions
Is this a complete foil?
No. It includes the mast, board adapter, fuselage, stabilizer, connection hardware and travel bag, but it does not include a front wing or foil-to-board mounting screws.
Which size is best for wing foiling?
The AF85 is the best all-around option for most wing foilers because its additional height provides more clearance in chop and more room to bank through turns.
Why would I choose the AF72?
The AF72 is better for prone foiling, shallow-water locations and riders who want a shorter mast that feels manageable during takeoffs, touchdowns and early progression.
Why choose aluminum instead of carbon?
Aluminum provides a durable and cost-effective entry into the Sonar system. Carbon reduces weight and delivers more immediate feedback, but typically costs more and is not necessary for every rider.
Can I choose my own front wing?
Yes. That is one of the main advantages of this package. Select a compatible North Sonar front wing based on your weight, discipline, experience and local conditions.
Does the package include a bag?
Yes. The Sonar Travel Bag is included and provides storage for the package components, with room for compatible mast and wing combinations.