Key points at a glance Key points at a glance. Original editorial diagram. Two pontoons can look almost identical from the dock. Same furniture, same deck. Then you crouch down and one has another tube running down the middle. That centre tube is more buoyancy under the boat.
Quick answer: A third tube adds another buoyant hull section, but "three tubes" doesn't describe the boat. Centre-tube length and shape, lifting strakes, underdeck shielding and steering all change from package to package. Ask for the current specification of the boat you're looking at, and test it with the load you usually carry.
Key points at a glance. Original editorial diagram.
Two pontoons can look almost identical from the dock. Same furniture, same deck. Then you crouch down and one has another tube running down the middle.
That centre tube is more buoyancy under the boat. But "tritoon" on a spec sheet is a starting point, not an answer. The tube's length, shape and position, plus the lifting surfaces and equipment around it, tell you more than the count does. Manitou's explanation of its V-Toon design shows a builder treating centre-tube geometry as a deliberate choice.
So the useful question isn't whether the boat has a third tube. It's what the whole package is built to do, and whether that matches how you'll use the boat.
Start With Legend's Packages
We sell Legend, so that's where we'll start. Legend is a Canadian company headquartered in Whitefish, Ontario, near Sudbury, and it designs its pontoons for Canadian boating conditions. Its pontoons come as packages with Mercury power and Legend's All-In Pricing.
Here's how the tube options look on two of Legend's pontoon lines:
| Legend line |
Tube setup |
| LE Series |
Two tubes standard, three-tube available on the 21' |
| Q Series |
Two-tube or three-tube options |
Three-tube packages are usually bundles rather than a single option: a full-length centre tube often arrives alongside lifting strakes, an underdeck shield and an upgraded steering system. Package contents change by model year and by builder, so read the current spec sheet for the boat in front of you rather than a brochure from a past season.
On any pontoon, ours or anyone's, get the current spec for that boat and pull the features apart so you know what you're paying for.
Check the Length of the Centre Tube
Three tubes doesn't always mean three matching, full-length tubes.
Bennington's Canadian performance-package page makes the point. Its SPS package lists three full-length tubes, while its Express package uses a partial centre tube. Both have a centre tube. They're different arrangements under the deck.
A real tritoon from underneath. Centre tube with its keel strip in the middle, outer tubes either side, underdeck shielding bolted above. HBW photo.
Ask to see the underside or a drawing of the configuration you're considering. Where does the centre section start and end? Is the motor carried on an integrated centre-tube transom or some other setup? Get the answer for the boat in front of you, not a model with a similar name.
Shape and Position Matter Too
Centre tubes don't have to match the outer tubes.
Manitou describes a design where the centre tube is a different size and sits lower than the outer tubes. Bennington also documents packages with an elliptical centre tube. That's two builders engineering different shapes and arrangements, and neither layout is the right one for every owner.
This is where a two-word spec like "triple tube" leaves too much out. Find out which package the boat has, then read that package's details. A centre-tube diameter on its own won't tell you how the boat feels with your crew and your cooler aboard.
Lifting Strakes Are a Separate Feature
The shaped strips running along a tube are their own part of the design. Lifting strakes are meant to create lift as water flows past, so where they sit and how they're shaped belong in the comparison. Manitou describes its positive-angle strakes as part of its engineered hull geometry.
Don't stop at "does it have strakes?" Ask where they are. On the centre tube? On the inside faces of the outer tubes? What does the builder specify for this package?
A strake isn't a speed promise. How the boat gets up and rides in a chop comes down to the actual boat, motor, load and conditions. Counting strips isn't a water test.
Look at the Rest of the Package
A tube package can change more than the tubes. Use this checklist to separate the pieces:
| Detail to confirm |
Useful question |
| Centre tube |
Is it full-length or partial, and what are its shape and position? |
| Lifting surfaces |
Which tubes carry strakes or foils? |
| Underdeck shield |
What shielding is included in this package? |
| Steering |
What system is actually fitted? |
| Motor and loading |
What does this boat's capacity plate and documentation allow? |
Compare It With the Load You'll Actually Carry
Go into a demo with your normal day in mind: who's usually aboard, what gear comes along, and how fast you like to run. Then pay attention to how the boat gets underway, what the view's like from the helm, how the steering feels and how it rides at your usual speeds. Do it inside the boat's operating limits and on a day with suitable conditions.
Keep loading limits separate from how roomy or buoyant a boat feels. Transport Canada's 2026 Safe Boating Guide says to follow the applicable maximum safe limits, and to use the manufacturer's guidance for boats over six metres whose compliance notices don't list those limits. Weight distribution and weather matter too. Never exceed the maximum horsepower on the capacity plate.
On horsepower, bigger isn't the goal. Cost aside, we'd size the motor one Mercury model step below the plate's maximum. If the plate says 150, we'd look at a 115. The max rating is often more power and more weight on the transom than the boat needs to run well, and our pontoon horsepower decision tree walks through how we size it. A different centre tube on another boat doesn't give your boat a higher rating, either. If you're thinking about altering a pontoon you already own, get manufacturer and qualified technical guidance for that hull before you treat a brochure package as an upgrade plan.
The furniture tells you where everyone sits. The details underneath tell you how the boat is meant to carry them.
What We See at HBW
A family pontoon on Rice Lake gets asked to do a lot: a slow evening cruise one day, a full load of guests the next. That's why we'd rather talk about how you'll use the boat before we talk about tube count. The centre tube is extra buoyancy. How much that matters depends on how much you carry and how you like to run.
Our short version: if most of your days are a few people and an easy cruise, don't let a spec sheet talk you into a package you won't use. If you fill every seat most weekends, the centre tube and everything bundled with it deserve a close look, and a demo with that full crew aboard.
If you're early in the process, start with is a pontoon right for your family on Rice Lake, then compare pontoon versus V-hull. Already own one and seeing issues? Our common pontoon problems post covers what we find.
Sources
Want to Look at a Pontoon Underneath?
Call us and we'll walk you through the current specification on any Legend pontoon you're considering, tubes and all. Already have a pontoon that needs new power? Build a Mercury repower quote online.
Phone: 905-342-2153
Configurator: mercuryrepower.ca
Service: hbwservice.ca
Harris Boat Works
5369 Harris Boat Works Rd, Gores Landing, ON K0K 2E0
harrisboatworks.ca | mercuryrepower.ca
