SEE THE
VIDEO
SPEED EFFICIENCY OPERATIONnaut. stat. n. mi. s. mi. sound
rpm knots mph gph mpg mpg range range angle level
1000 4.95 5.70 1.10 4.50 5.18 174 201 0 82
1500 6.26 7.20 1.80 3.48 4.00 135 155 1 84
2000 7.13 8.20 3.00 2.38 2.73 92 106 2 85
2500 9.30 10.70 4.20 2.21 2.55 86 99 4 86
3000 14.60 16.80 5.60 2.61 3.00 101 116 5 88
3500 21.03 24.20 6.70 3.14 3.61 121 140 4 93
4000 25.11 28.90 8.60 2.92 3.36 113 130 3 96
4500 28.42 32.70 10.90 2.61 3.00 101 116 2 98
5000 31.63 36.40 13.70 2.31 2.66 89 103 2 102
5600 34.50 39.70 17.80 1.84 2.12 71 82 2 110
MOST ECONOMICAL CRUISING SPEEDHigh Points
XBuilt-in ballast system can quickly
add 750 pounds of water weight to
your surf experience thanks to the
optional QuickFill system.
XSupreme’s SeeTouch Dash proved
a simple, easy-to-use touchscreen
that makes navigating the boat’s
systems a breeze.
XSpradling matte vinyl used in the
S21 is comfortable (the new camel
color looks sharp!) and up to the
rigorous demands placed by sandy
feet, boards, spilled beverages
and more.Specs
· LOA: 20’11" · BEAM: 8'6" · DRY
WEIGHT: 4,200 lb. · SEATING CAPAC-
ITY: 12. · FUEL CAPACITY: 43 gal.How We Tested
ENGINE: 409 hp GM Marine EX3 by
Crusader
DRIVE/ PROP: V-drive/14^1 / 2 " x 14^1 / 2 "
4-blade Nibral
GEAR RATIO: 1.72:1
FUEL LOAD: 28 gal.
CREW WEIGHT: 365 lb.
Price
$80,619 (as tested without
tax/dealer prep/shipping)SUPREME
S21
speed proved no problem for this boat, and
the 409 horses under its hatch creased the
surface of the lake at 39.7 mph. From a
standstill, it hit 20 mph in just 5.2 seconds,
and it posted better than 3 mpg economy
at 24 mph.
Supreme debuted the QuickFill bal-
last system, a 750-pound-capacity
ballast tooled into the hull, aboard the
S21. It fi lls up super-quick. An optional
plug-and-play ballast provides even more
wave-making.
If you don’t need the size of a bigger
boat but want something that can eas-
ily provide serious wakesurf fun for you
and your friends (while not breaking the
bank), the Supreme S21 could be speaking
your language.Designed as a smaller boat that can deliver
a big wave at a more budget-friendly price,
the Supreme S21 performed admirably
during our day on the lake testing and
riding behind it. In fact, we enlisted the
assistance of the pros at sister publica-
tion Wakeboarding magazine to assess the
wake, wave and rideability
this boat delivers.
Our pro riders noted that
the S21’s wave wouldn’t blow
boaters away with how big it
is, but they came off the water
impressed with how capable
it is for a variety of riding
styles. At just under 21 feet
length overall, the Supreme
S21 might not be thought of
as a boat that can make a solid
wave, especially when com-
pared to larger 24- or 25-foot
boats, but we proved it defi es
the odds. The biggest thing wenoticed when testing the S21 was that the
pocket in the wave manifested itself far-
ther back from the transom than the wave
of many other boats of similar size. That
characteristic makes it great for begin-
ners, who often struggle controlling their
speed and can become psyched out for
fear of running into the back of the boat.
On the other hand, the pocket of the S21’s
wave proved big enough to allow advanced
riders to build up speed for doing tricks or
airs. Beginners to more-advanced riders
will love the mellow, consistent shape and
the sizable pocket of the wave this boat
produces. Ya gotta love win-win scenarios.
We were also impressed with the run-
ning capability of the S21. Rushing to topPHOTOS: ZACH STOVALLSUPREME BOATS
Merced, California; 209-384-0255; supremetowboats.comTo watch our
video review of
the S21, scan
this tag or visit
boatingmag
.com/bbg18/
supremes21.
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RESULTSBOAT BUYERS GUIDE 2018 | 84 | BOATINGMAG.COM