Allison XB-21 BasSport Pro 2013 boat specs
Allison
Allison XB-21 BasSport Pro 2013
2013
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VS
Allison XB-21 ProSport Bass 2012 boat specs
Allison
Allison XB-21 ProSport Bass 2012
2012
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Allison XB-21 BasSport Pro 2013 vs Allison XB-21 ProSport Bass 2012 — A Close Look at Two Modified Vees

When two boats share the same hull type — in this case both the Allison XB-21 BasSport Pro 2013 and the Allison XB-21 ProSport Bass 2012 are modified vee designs with composite construction — the buying decision usually comes down to a handful of practical questions: how many people are you putting on the water, how far do you trailer, and what does your tow vehicle weigh?

On paper these two are close siblings in the size department — Allison XB-21 BasSport Pro 2013 at 21,2 ft versus Allison XB-21 ProSport Bass 2012 at 21,2 ft. Weight tells a clearer story for trailering families: the Allison XB-21 BasSport Pro 2013 tips the scales at 135 lbs — 122 lbs more than the Allison XB-21 ProSport Bass 2012 at 13 lbs. That difference is meaningful if you're working within a half-ton or three-quarter-ton truck's tow rating, especially once you factor in a motor, gear, and fuel.

The Allison XB-21 ProSport Bass 2012 tops out at 510 hp. Engine specs for the Allison XB-21 BasSport Pro 2013 aren't listed — confirm with a dealer before selecting an outboard.Both carry nearly identical fuel loads — 36 gal and 36 gal — so range won't be a tiebreaker here.

Both boats are rated for 6 passengers — a good fit for a family of four or five plus guests. Comfort at capacity is another matter; the longer hull typically means more seat options and better weight distribution.

Bottom line: The Allison XB-21 BasSport Pro 2013 and Allison XB-21 ProSport Bass 2012 are closely matched on the specs that matter most. Test-ride both on the water you actually use, check current dealer pricing, and factor in long-term service access before you sign.
General Boat Info
MakeAllison
MakeAllison
ModelXB-21 BasSport Pro
ModelXB-21 ProSport Bass
Model Year2013
Model Year2012
Measurements / Dimensions
Beam93 in
Beam93 in
Beam - Meters2.36
Beam - Meters2.36
Beam - Inches93
Beam - Inches93
Weight - Detail1,280-1,350 lbs
Weight - Detail1,250-1,300 lbs
Weight - kg612.35
Weight - kg589.67
Weight - lbs.135
Weight - lbs.13
Length [deck]Front Deck: 43 sq. ft. Rear Deck: 28 sq. ft
Length [deck]not available
Length - Feet21.17
Length - Feet21.17
Length overall - Detail21 ft. 2 in
Length overall - Detail21 ft. 2 in
Length overall - Meters6.45
Length overall - Meters6.45
Length overall - Inches254
Length overall - Inches254
Body / Hull
Hull materialComposite
Hull materialComposite
Hull typeModified Vee
Hull typeModified Vee
Engine and Drivetrain
Fuel tank capacity - Detail36 gal
Fuel tank capacity - Detail36 gal
Fuel tank capacity - Liters136.27
Fuel tank capacity - Liters136.27
Fuel tank capacity - Gal36
Fuel tank capacity - Gal36
Fuel typeGas
Fuel typeGas
Drive typeOutboard
Drive typeOutboard
Horsepowernot available
Horsepower135-200 hp
Engine maxnot available
Engine maxMax Engine Weight: 510 lbs
Operational Info
StorageOver 70 cu. ft. Built in Cooler: 38 qt. Rods: 26+ Livewell: 38 gal
StorageLive Well: 38 gal
Trailer Info
Trailer - DetailAllison tandem deluxe with disc brakes and swing away tongue
Trailer - DetailAllison tandem deluxe with disc brakes and swing away tongue

Allison XB-21 BasSport Pro 2013 vs Allison XB-21 ProSport Bass 2012 — Common Questions

Which is the larger boat — the Allison XB-21 BasSport Pro 2013 or the Allison XB-21 ProSport Bass 2012?
The Allison XB-21 ProSport Bass 2012 is the longer of the two at 21,2 feet overall. The Allison XB-21 BasSport Pro 2013 comes in at 21,2 feet, making it roughly 0,0 ft shorter — a meaningful difference in deck room and overall on-water presence.
Which is easier to trailer — the Allison XB-21 BasSport Pro 2013 or the Allison XB-21 ProSport Bass 2012?
For trailering, the Allison XB-21 ProSport Bass 2012 has the edge at 13 lbs dry weight versus 135 lbs for the Allison XB-21 BasSport Pro 2013. Add a motor (typically 300–500 lbs for an outboard in this class), gear, and a partial fuel load and the difference grows. Lighter is friendlier on smaller tow vehicles and on fuel economy while hauling.
What is the maximum horsepower rating for these boats?
The Allison XB-21 ProSport Bass 2012 has a documented max rating of 510 hp. Engine specifications for the Allison XB-21 BasSport Pro 2013 were not available in our database — check the OEM spec sheet or manufacturer's website for confirmation.
How many people can each boat hold?
The Allison XB-21 BasSport Pro 2013 is Coast Guard rated for 6 passengers, while the Allison XB-21 ProSport Bass 2012 is certified for 6. Note that legal capacity and comfortable capacity aren't always the same thing — on a full day out, most experienced boaters aim for about 80% of the rated number to keep things comfortable.
Do these boats require an oversize trailer permit to tow on US highways?
Both the Allison XB-21 BasSport Pro 2013 and Allison XB-21 ProSport Bass 2012 share an 93 in beam — meaning both sit right at the 8’6" threshold that most US states use for standard-width loads. In most states you can tow at that width without a special permit, but regulations vary. Always check the rules for your state and any states you'll be passing through before your first long haul.
How do the fuel tanks compare on the Allison XB-21 BasSport Pro 2013 and Allison XB-21 ProSport Bass 2012?
Both boats carry similar fuel loads — 36 gallons and 36 gallons respectively. Range will depend heavily on motor choice, throttle usage, and whether you're on flat lake water or coastal chop.
Are the Allison XB-21 BasSport Pro 2013 and Allison XB-21 ProSport Bass 2012 from the same manufacturer?
Yes — both the Allison XB-21 BasSport Pro 2013 and the Allison XB-21 ProSport Bass 2012 are built by Allison. That means shared dealer networks, common parts availability, and consistent build quality across the line. The choice between them is essentially a question of how much boat you need, not which brand you trust.