AXIS Advance+ B-Series Fuselages Explained: Short, Ultrashort, Crazyshort, Sillyshort & Psychoshort
The AXIS fuselage is one of the most important parts of your foil setup, but it is often one of the last things riders think about.
That is a mistake. The fuselage affects pitch stability, turning radius, pump, rail-to-rail feel and how connected the foil feels under your feet. Change the fuselage and the same front wing can suddenly feel calmer, looser, more surfy or much more reactive.
The AXIS Advance+ B-Series Fuselages are for riders who want a looser, more connected and more surf-driven feel from compatible AXIS Black/B-Series foil setups.
This guide explains what the AXIS Advance+ fuselage does, how it differs from the standard AXIS Black Series fuselage, and which length makes most sense for wing foiling, SUP foiling, prone foiling, surf-style riding, wake foiling and progression.
What does a foil fuselage do?
The fuselage is the central spine of the foil. It connects the mast, front wing and rear stabiliser.
In simple terms, it controls the relationship between your front wing, your rear wing and where the mast sits beneath your board. That affects how the foil lifts, turns, tracks, pumps and reacts when you move your feet.
A longer fuselage generally gives more pitch stability and a more settled ride. A shorter fuselage generally feels looser, more reactive and easier to turn tightly, but it also demands better rider control.
What is different about the AXIS Advance+ B-Series fuselage?
The key difference is the Advance+ geometry.
Compared with a regular AXIS Black/B-Series fuselage, the mast position is moved further forward towards the front wing. In plain English, this makes the foil feel more willing to roll, carve and redirect.
The result is a more surf-focused feel. The foil is easier to tip from rail to rail, easier to drive into tighter turns and less locked-in through a carve.
That is why the AXIS Advance+ B-Series fuselage makes most sense for riders who are already comfortable on foil and want to tune their setup for waves, tighter turns, surf-style winging, SUP foiling, prone foiling or wake foiling.
It is not simply a “better” fuselage than the standard AXIS Black Series. It is a more specialised option with a different feel.
AXIS Advance+ B-Series vs standard AXIS Black Series fuselage
| Feature | AXIS Black Series Fuselage | AXIS Advance+ B-Series Fuselage |
|---|---|---|
| Main feel | More familiar, composed and performance-led | Looser, surfier and more reactive |
| Best for | Speed, tracking, control and general performance foiling | Surf-style turns, waves, tighter pockets and faster rail-to-rail response |
| Rider level | Intermediate upwards, depending on wing choice | Intermediate to advanced riders who understand their current setup |
| Turning feel | More predictable and balanced | Easier to initiate turns and redirect quickly |
| Trade-off | Less loose than Advance+ | Less tracking stability and top-end composure than standard Black |
Choose the standard AXIS Black Series Fuselage if you want the more dependable all-round performance option.
Choose the AXIS Advance+ B-Series Fuselage if your current setup feels a little too locked-in and you want more looseness, pivot and surf-style response.
Important compatibility note
The AXIS Advance+ B-Series Fuselages are designed for compatible AXIS Black/B-Series foil setups.
They are not the same as AXIS Red Series fuselages and they are not interchangeable with Red Series-only front wings.
If you already own AXIS kit, check your front wing family before ordering. The colour of the fuselage matters, but the real decision is compatibility with your front wing, mast and rear stabiliser.
If you are unsure, speak to the team before ordering. AXIS is a brilliant modular system, but it rewards getting the combination right.
AXIS Advance+ B-Series length comparison
The AXIS Advance+ B-Series range gives you several lengths so you can tune how stable, loose or reactive the foil feels.
| Fuselage length | Best for | Ride feel | Who should choose it? |
|---|---|---|---|
| Short 700mm | Safest step into Advance+ geometry | Most settled Advance+ option | Riders wanting more surf feel without going too short too soon |
| Ultrashort 640mm | All-round performance progression | Responsive but still usable | Confident intermediates and advanced riders wanting a strong balance |
| Crazyshort 600mm | Wave, prone, SUP foil and surf-style winging | Sharper, looser and more pivot-focused | Riders already comfortable on shorter AXIS setups |
| Sillyshort 560mm | Very surf-focused riding | Highly reactive and loose | Advanced riders prioritising tight turns over tracking stability |
| Psychoshort 520mm | Specialist high-skill surf feel | Maximum looseness | Expert riders who know exactly why they want such a compact setup |
Choose the Short 700mm if you want the safest step into Advance+
The Short 700mm is the most stable and most composed option in the Advance+ B-Series range.
It is the one to choose if you like the idea of the Advance+ surfier feel, but you do not want to make the foil too twitchy or technical.
Choose the AXIS Advance+ Short 700mm if:
- You are moving from a standard Black fuselage and want a controlled first step into Advance+ geometry.
- You ride in choppy UK conditions and still want a calmer platform.
- You value pitch stability and tracking as much as turning response.
- You are using a larger or more lift-focused front wing and do not want the setup to become too lively.
- You are a heavier rider and want a bit more margin for error.
For many riders, the Short is the sensible way to access the Advance+ feel without overdoing it.
Choose the Ultrashort 640mm if you want the best all-round performance balance
The Ultrashort 640mm is likely to be the sweet spot for a lot of confident AXIS riders.
It gives a clear step up in manoeuvrability compared with a longer, more settled fuselage, but it is not as specialist as the Crazyshort, Sillyshort or Psychoshort.
Choose the AXIS Advance+ Ultrashort 640mm if:
- You are already flying comfortably and want the foil to feel more alive.
- You are working on tighter gybes, more committed carves and wave riding.
- You want a setup that still works across wing foiling, SUP foil and surf-style use.
- You want more looseness without making the foil feel too nervous.
- You are not sure whether Crazyshort is too big a jump.
For many intermediate and advanced riders, Ultrashort is the most useful long-term option because it gives meaningful performance tuning without becoming too extreme.
Choose the Crazyshort 600mm if you want a proper surf-style feel
The Crazyshort 600mm is where the Advance+ range starts to feel much more wave-focused.
It is looser, quicker to redirect and more responsive underfoot. That can feel brilliant if you are riding waves, linking tighter turns or wanting the foil to roll more easily beneath you.
Choose the AXIS Advance+ Crazyshort 600mm if:
- You are already confident on foil and have good pitch control.
- You want a looser setup for prone, SUP foil, wake foil or surf-style winging.
- You are happy to trade some tracking stability for tighter turning.
- Your current AXIS setup feels too long, locked-in or slow to redirect.
- You are already using shorter fuselages and want the next step in looseness.
This is not the best choice for a rider still building basic take-offs, ride height control or first gybes. It is a great tuning option once you already understand what you want to change.
Choose the Sillyshort 560mm if turning response matters more than stability
The Sillyshort 560mm is a more advanced, more specialised option.
It is aimed at riders who want the foil to feel very reactive and surf-focused. It can be excellent in the right hands, especially where tight turns, pocket riding and fast redirection matter more than straight-line stability.
Choose the AXIS Advance+ Sillyshort 560mm if:
- You are an advanced rider with strong foil control.
- You ride waves and want the foil to feel as loose as possible without going to the very shortest option.
- You do not mind a more sensitive pitch feel.
- You are comfortable tuning mast position, rear wing choice and stance to suit the setup.
If you are asking whether Sillyshort is suitable for learning, the answer is almost certainly no. It is a performance tuning option, not a confidence-building one.
Choose the Psychoshort 520mm if you know exactly why you want it
The Psychoshort 520mm is the most specialist option in the Advance+ B-Series range.
It gives maximum looseness and the shortest, most reactive feel. That can be exactly what an expert surf foil rider wants, but it is not a general-purpose recommendation.
Choose the AXIS Advance+ Psychoshort 520mm if:
- You are an expert rider chasing the loosest possible AXIS Advance+ feel.
- You already understand how very short fuselage setups affect pitch, turning and stability.
- You ride in conditions where tight, fast redirection is more important than tracking.
- You are happy to spend time fine-tuning your mast position, stabiliser choice and stance.
For most riders, Short, Ultrashort or Crazyshort will be the more sensible place to start.
Why you may need to go shorter than your current fuselage
This is one of the most important points with AXIS Advance+.
Because the mast position is moved forward, the effective feel of the rear section to the stabiliser changes. That means you should not compare an Advance+ fuselage purely by its total length against your standard Black fuselage.
In practice, many riders moving from a standard AXIS Black fuselage may choose a shorter Advance+ length than they normally ride.
For example, a rider on a standard Black Ultrashort may find the Advance+ Crazyshort a more logical surf-focused step than simply choosing Advance+ Ultrashort by name.
This is exactly where advice matters. The right answer depends on your front wing, rear stabiliser, mast, board, weight, ability and the type of riding you are trying to improve.
How fuselage length affects foil feel
| Ride characteristic | Longer fuselage | Shorter fuselage |
|---|---|---|
| Pitch stability | More settled and forgiving | More sensitive and reactive |
| Turning radius | Wider and calmer | Tighter and more surf-like |
| Tracking | Better straight-line composure | Less locked-in |
| Rail-to-rail feel | Smoother but slower to redirect | Quicker and easier to roll |
| Learning curve | Easier | More demanding |
| Wave riding | Controlled but less loose | More agile and expressive |
Who should buy the AXIS Advance+ B-Series fuselage?
The AXIS Advance+ B-Series fuselage is best for riders who already know they want a more active foil.
It suits:
- Intermediate and advanced wing foilers who want a surfier feel.
- SUP foilers wanting tighter turns and quicker redirection.
- Prone foilers looking for a more connected wave feel.
- Wake foilers who want the foil to roll and carve more easily.
- Experienced AXIS riders fine-tuning compatible Black/B-Series setups.
It is not the first fuselage we would normally suggest for a complete beginner. If you are still learning the basics, a more settled setup will usually help you progress faster.
Who should stay with the standard AXIS Black Series fuselage?
The standard AXIS Black Series fuselage still makes a lot of sense.
Stay with, or choose, the standard AXIS Black Series Fuselage if:
- You want better straight-line tracking.
- You prioritise speed, control and predictability.
- You are still developing consistency through gybes and take-offs.
- You ride flatter water, higher speeds or want a more locked-in feel.
- You do not specifically want a looser surf-style setup.
Advance+ is a tuning option. It should solve a real problem or deliver a feel you actively want.
What about AXIS Advance+ FATTY Black Fuselages?
The AXIS Advance+ FATTY Black Fuselages sit in a different part of the AXIS range.
Where the Advance+ B-Series fuselage is the surfier option for compatible Black/B-Series setups, the FATTY platform is more about stiffness, load control and support for bigger modern high-aspect foil setups.
Look at Advance+ FATTY if you are building around larger wings for pump foiling, light-wind winging, downwind foiling or high-load glide-focused riding.
Look at Advance+ B-Series if your priority is looseness, carving and surf-style response on compatible Black/B-Series equipment.
Recommended direction by rider type
| Rider type | Most sensible direction | Why |
|---|---|---|
| Early intermediate wing foiler | Standard Black or Advance+ Short | Better control while still allowing progression |
| Confident freeride wing foiler | Advance+ Short or Ultrashort | More manoeuvrability without becoming too extreme |
| Wave-focused wing foiler | Advance+ Ultrashort or Crazyshort | Looser turning and better pocket response |
| SUP foil rider | Advance+ Ultrashort, Crazyshort or shorter | Depends on wave size, skill level and front wing choice |
| Prone foil rider | Advance+ Crazyshort, Sillyshort or Psychoshort | For experienced riders chasing a compact surf feel |
| Downwind / pump / bigger wing rider | Consider Advance+ FATTY instead | Extra stiffness and load control may matter more than looseness |
Real-world UK riding notes
UK wing and foil conditions are rarely perfect. A lot of riders are dealing with short-period chop, gusty winds, tidal flow and messy wave faces.
That matters when choosing fuselage length.
A very short fuselage can feel amazing in clean waves, but it can also feel busy if you are riding confused water or still building consistency. If your local spot is choppy, tidal or gusty, do not ignore stability just because the shortest option sounds exciting.
For many UK riders, the best progression route is:
- Use the standard Black or Advance+ Short if you want control and confidence.
- Move to Advance+ Ultrashort when you want the foil to turn more freely.
- Only go Crazyshort, Sillyshort or Psychoshort when you are confident enough to make use of the extra looseness.
Try before you commit
Fuselage choice is one of those things you feel immediately on the water.
At The SUP Co x Lymington, we can help suitable riders make better wing, foil and component decisions through real-world advice and selected demo opportunities.
If you are already on AXIS and wondering whether to move to Advance+, send us your current setup, rider weight, ability level and where you ride. We can help you work out whether Short, Ultrashort, Crazyshort, Sillyshort or Psychoshort makes the most sense.
Finance and delivery
Finance options are available on qualifying orders, which can be useful when investing in a complete foil setup or making a larger upgrade.
Availability can vary by size and variant, especially with specialist AXIS components. If you need a fuselage for a specific trip, demo or event, please contact the team before ordering so we can confirm the latest position.
FAQs
What is the AXIS Advance+ B-Series fuselage?
It is a performance-focused AXIS Black/B-Series fuselage with Advance+ geometry. The mast position is moved forward compared with the regular Black/B-Series fuselage layout, giving a looser, more connected and more surf-driven feel.
Is the AXIS Advance+ B-Series fuselage good for beginners?
Usually not as a first choice. It is better suited to intermediate and advanced riders who already have reasonable foil control and want a more reactive setup. Complete beginners normally benefit from a more stable, predictable fuselage and foil combination.
Which AXIS Advance+ fuselage length should I choose?
Choose Short 700mm for the most stable Advance+ feel, Ultrashort 640mm for the best all-round performance balance, Crazyshort 600mm for a looser wave-focused feel, Sillyshort 560mm for very reactive surf-style riding, and Psychoshort 520mm only if you are an expert rider who wants maximum looseness.
What is the difference between AXIS Black Series and AXIS Advance+ B-Series?
The standard AXIS Black Series fuselage gives a more familiar, composed and performance-led feel. The AXIS Advance+ B-Series fuselage moves the mast position forward to make the foil feel looser, easier to roll and more connected through surf-style turns.
Will the AXIS Advance+ B-Series fuselage fit Red Series wings?
No. The AXIS Advance+ B-Series fuselage is for compatible AXIS Black/B-Series setups. It is not interchangeable with Red Series-only front wings. If you are unsure which system you have, ask us before ordering.
Should I go shorter than my current AXIS fuselage?
Often, yes. Because the Advance+ geometry moves the mast position forward, many riders choose a shorter Advance+ fuselage than the standard Black fuselage they are used to. For example, some riders moving from a standard Ultrashort may consider Advance+ Crazyshort, depending on their wing, stabiliser and riding style.
Is the Crazyshort better than the Ultrashort?
Not automatically. Crazyshort is looser and more surf-focused, but Ultrashort is usually the better all-round progression choice. Choose Crazyshort only if you are confident and actively want a sharper, more reactive feel.
What is the shortest AXIS Advance+ B-Series fuselage?
The Psychoshort 520mm is the shortest option in the AXIS Advance+ B-Series range. It is a specialist choice for expert riders who want the loosest possible feel.
Can The SUP Company help me choose the right AXIS fuselage?
Yes. Tell us your current AXIS setup, rider weight, ability level, where you ride and what you want to improve. We can help you choose the right fuselage length and check compatibility before you order.
Final advice
Choose the Short 700mm if you want the safest step into Advance+ geometry.
Choose the Ultrashort 640mm if you want the best all-round balance of looseness and control.
Choose the Crazyshort 600mm if you are confident and want a proper surf-style feel.
Choose the Sillyshort 560mm or Psychoshort 520mm only if you are an advanced rider chasing a very reactive, specialist setup.
For most progressing riders, the decision is not “which is shortest?” It is “how much stability am I willing to trade for more manoeuvrability?”
Browse the AXIS Advance+ B-Series Fuselages, explore the full AXIS Foils collection, or contact The SUP Company team if you want help matching the fuselage to your front wing, rear stabiliser, mast and riding goals.