Designed with the professional in mind, it’s priced for the weekend warrior. The S21 first introduced Supreme’s QuickFill ballast system, which is a 750-pound capacity ballast tooled into the hull that fills with water in two minutes. In other words, it’s ready when you are to chase those goals. Optional Plug and Play ballast in the back is available to elevate your wake riding. It has room for 12, with safety and spacious seating prioritized.

Basic Boat Info

Make: Supreme
Model: S21
Year: 2018
Category: Power
Construction: Fiberglass


Length: 20'11 ft
Beam: 8'6 ft
Max Draft: 2'6 ft
Dry Weight: 4,200 lb

Engines / Speed

Engines: 1
  • Make: PCM
  • Engine Power: 340hp
  • Type: Inboard


Fuel Tanks: 1
Fuel Tank Capacity: 45 gal


Maximum Number Of Passengers: 12
Boat Class: Ski and Wakeboard Boats
Standard Features
  • Custom designed interiors with top of the line marine vinyl and foam
  • Massive amounts of storage
  • Custom Vinyl Wrapped with Full Instrumentation
  • 40 oz Marine Carpet
  • Digital Speed Control
  • Depth Finder
  • Air – Water Temperature Display
  • Supreme Altitude Control System
  • Pro S4 Tower System (White or Black)
  • Swivel Flip up Bolster Driver’s Seat
  • Dual Fuel Fills
  • Stainless Cup Holders
  • Quickfill Ballast 1000lbs hull-flooding
  • Clarion Bluetooth Stereo
  • Snap-In 40oz Marine Carpet
  • Wake Plate.

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