Do You Know How Your Tubes Are Attached to Your Hull on a Rigid Inflatable Boat and the Various Methods Used?
If you own, maintain or specify a rigid inflatable boat, it is worth understanding how the tubes are attached to the hull. This detail affects strength, service life, repair options and long-term replacement costs.
Not all RIB tubes are fitted in the same way. Some systems are designed around a clean finish. Others are designed around serviceability, durability and easier future replacement. If you run a leisure RIB, commercial craft, rescue boat or patrol vessel, knowing the attachment method helps you make better decisions.
Why the tube attachment method matters
The way rigid inflatable boat tubes are attached to the hull is not a minor detail. It affects:
- durability under load
- ease of future tube replacement
- the finish and appearance of the boat
- wear points between hull and tube
- suitability for hard commercial use
- Longevity of the tube Installation
On some boats, the system is chosen mainly for appearance and production speed. On others, it is chosen for practical service life and repair resilience.
Gusset or hinge method
The gusset or hinge method is one of the most widely used RIB tube attachment methods on rigid inflatable boats. It uses a shaped bonding arrangement with a gusset panel that acts as a fabric hinge between the rigid inflatable boat tube and the hull. This gives the tube a more natural range of movement in service and helps the bond cope with the normal movement of the tube in changing conditions.
On a rigid inflatable boat, the tube is always moving slightly as it inflates, deflates and works against the hull in use. The gusset creates a natural hinge point, which reduces direct stress on the glued joint and helps support the tube more effectively over time.
For many rigid inflatable boat tube designs, the gusset or hinge method gives a strong and practical attachment solution that balances flexibility, support and durability. It is a proven option for both leisure and commercial RIB tube installations.
Why it is widely used:
- the tube can deflate without pulling straight down on the bond
- the hull edge is better protected
- the tube is less likely to be pinched against the hull
- it suits workboats and heavier-duty applications well
Carrier flange with internal strip
The carrier flange with internal strip is a widely used RIB tube attachment method on rigid inflatable boats. It builds on the basic carrier flange system by adding an internal fabric strip between the hull and the tube. This helps close the inside gap, creates a cleaner finish and increases the bonded area between the RIB tube and hull.
On many rigid inflatable boat builds, this method is chosen because it offers a practical balance between ease of installation, appearance and strength. It is often seen as a quick and effective way to fit RIB tubes while giving a neater internal detail than a basic carrier flange alone.
Main advantages:
- Cleaner internal finish inside the boat
- More bonded area between the rigid inflatable boat tube and hull
- strong balance between appearance and durability
- Good balance between appearance, durability and installation time
Slide-on tubes
Slide-on rigid inflatable boat tubes use a mechanical retention system rather than relying only on bonding. This method is widely used where serviceability matters.
Common advantages:
- tube can be removed and stored
- tube can be removed for repair
- tube can be replaced more easily
Common trade-offs:
- the boat is often wetter in use
- wear parts such as the luff rope may need more attention
- some systems rely heavily on materials and build quality to prevent separation issues
This method is often well suited to police, rescue, military and other professional RIB applications where through-life maintenance matters as much as first fit appearance.
D-tube on luff ropes
D-tubes are commonly used on commercial RIBs, patrol craft, rescue boats and other specialist rigid inflatable boats where layout and working space matter as much as buoyancy. Unlike a traditional round RIB tube, a D-tube has a flatter inner face, which changes how it sits against the hull and how the tube attachment system is designed.
This style of rigid inflatable boat tube is often chosen where operators want to maximise internal deck space, improve movement onboard and create a more practical working platform. By sitting differently to a conventional round tube, a D-tube can help deliver a better balance between buoyancy, internal beam and usable layout.
This arrangement is often chosen where you want:
- more usable deck space
- A practical layout for boarding, working and passenger movement
- a different balance between buoyancy shape and layout
- Well suited to commercial, rescue and specialist RIB applications
For many commercial rigid inflatable boats, the D-tube attachment method is chosen because it supports a more task-focused layout. It is a practical option where you need RIB tubes that work with the job of the boat, not against it.
Bolt rope system
The bolt rope attachment method is a more traditional RIB tube fixing system found on some older rigid inflatable boats, safety craft and specialist fleet vessels. It uses a rope or reinforced edge section built into the tube, which is then retained by a long metal bar or track fixed along the hull. This gives the tube a form of mechanical retention rather than relying on adhesive bonding alone.
While it is less common on many modern RIB tube installations, this attachment method still has value in certain applications. It has a long service history and remains relevant where operators are working with legacy craft, established fleet designs or specialist rigid inflatable boat layouts.
Why it still matters:
- Proven heritage on older and specialist RIB designs
- it suits certain specialist craft
- it uses mechanical retention rather than relying only on adhesive bonding
- it still has relevance in some commercial and legacy fleet applications
For some rigid inflatable boat tube systems, the bolt rope method remains a practical solution. It is especially relevant where the original hull was designed around this style of tube attachment and where maintaining the existing system makes the most sense.
Carrier flange with edging rope
The carrier flange with edging rope is a RIB tube attachment method based on a standard flange system, finished with an internal edging rope or trim detail along the inside edge of the tube. The purpose is to give the rigid inflatable boat tube installation a smarter and more refined appearance, while covering the inside edge more neatly.
This method is often seen on rigid inflatable boats where finish and presentation are important. It gives the tube attachment a more polished internal detail and suits boats where visual appearance carries more weight.
Why some owners prefer it:
- smart internal finish
- better visual detail
- suits higher-end boats where appearance is a priority
Compared with a carrier flange and internal strip arrangement, this method is generally more focused on finish and presentation than on adding extra bonded support area. For owners looking for a tidy and more finished look to their RIB tube installation, it remains a popular choice.
What this means when replacing RIB tubes
If you are planning to replace RIB tubes, the existing attachment method matters. It affects how the old tube is removed, whether the hull edge needs preparation or repair, what replacement pattern is suitable, and how long the work will take.
When assessing rigid inflatable boat tubes for replacement, it is worth looking beyond the fabric and checking how the whole tube-to-hull system has been designed.
Need advice on your RIB tubes?
If you are unsure how your RIB tubes are attached to the hull, a proper inspection will usually identify the original design, likely wear points and the best route for repair or replacement.
If you want advice on RIB tubes, rigid inflatable boat tubes, replacement options or repair routes for your hull and tube setup, get in touch.
Frequently asked questions about RIB tube attachment
How are RIB tubes attached to the hull?
RIB tubes are attached using bonded systems, mechanical retention systems, or a combination of both. Common methods include gusset or hinge bonding, carrier flanges, slide-on tubes, D-tube systems and bolt rope arrangements.
Which tube attachment method is best for a commercial RIB?
That depends on how the boat is used, but commercial operators often place more value on serviceability, repair access and lifecycle cost than on appearance alone. Slide-on systems and robust bonded methods are both common depending on the application.
Can RIB tubes be replaced without changing the hull?
Yes. In many cases the existing hull is retained and new tubes are made to suit the original attachment system. The condition of the hull edge and the original fitting method will determine the best route
Need help identifying your tube material?
If you are not sure what your RIB tubes are made from, we can assess the material, the condition and the likely repairability of the existing tube. We can then advise whether a repair, replacement collar or full retube is the better route for your boat.
Related Pages
Related RIB tube, repair and retube services
Need to identify your tube material before deciding on repair or replacement? These related pages cover retubing, repairs, new Hypalon tubes and trade supply.
RIB Retube
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RIB Repairs
Repair services for damaged, ageing or worn inflatable tubes, with practical advice on when repair still makes sense.
New Hypalon Tubes
New Hypalon tubes and collars built from Orca fabric for leisure, commercial and specialist rigid inflatable boats.
Trade and OEM
Support for builders, fleet operators and trade customers needing replacement tubes, collars and OEM inflatable supply.