• Canoes
  • Dollies & Carts
  • Duck Boats
  • Fishing Boats 
  • Kayaks
  • Sailboats
  • Trailers
  • Water Cycles
  • Nationwide Shipping

CastleCraft Logo
  • HydroBike
  • Meyers
  • Michicraft
  • Seacycle 
  • Seitech
  • Snark
  • Sportspal
  • Spring Creek
  • Trailex
  • Water Bike
  • Walden

Trailex Super Duty
 Large Boat Launching  Dolly
For Boats Up To 700 lbs Capacity

Adjusts to Fit Virtually all Boats

Universal Adjustable Dolly for Larger Sailboats 
Such as Boston Whaler, Catalina 16, Flying Dutchman, Hunter 170, O'Day 16 Daysailer, Nomad Vanguard 17, Thistle and Similar Sailboats.  Also for Fishing Boats, Life Boats, Jon Boats and Large Zodiac Style Inflatables  


*within the 48 USA


Trailex Logo

Trailex Ultra-Light Aluminum Dollies come with  a One Year Limited Warranty.  Almost 50% lighter than steel  dollies and they Never Rust




Trailex-SUT-700-U Super Duty Launching Dolly
This Dolly has been Recently Redesigned.  The Center Bunks now allow boats to be easily pulled onto the dolly in addition to floating a boat onto it.

This a Preview Photo of the Trailex Model SUT-700-U  Super Duty Dolly.  It is shown with the Optional SP-1 Stabilizer Pads used for Inflatables or Wide Boats.  The Pads will extend out to 73" Wide, and over the wheels.  The Dolly is shown in the un-extended mode.  It will extend to 13'-0" in length.  It will carry boats from 8' to 20' long with a capacity of 700 lbs.



SUT-700-U  Standard is 1099.00 + FREE Shipping (48 USA)

Scroll Down the Page  for Details , Available Options Pricing  and Action Videos





Trailex Model SUT-700-U  Super Duty Dolly is designed to transport large sailboats, boats, large inflatable boats in a variety of lengths and up to 700lbs.  All Aluminum with padded  rear adjustable support bunks and front padded bunks.  Shown with the Optional SP-1 Stabilizer Pads on the rear axle.



Too large for your Boat? Click Here for the SUT-300-U Dolly for Boats up to 300 lbs






18 x 8.5

Boats to 16'
Inflatables to 16'
Sailboats to 20'

*within capacity

8'-6" to 13'-0"

Boats from 8'-0"
to 20'-0"


110  LBS

700 LBS *


*  Note That If You Have A  Heavy Boat, It Will Take More Than One Person To Move The Boat, Especially Through Soft Sand, or when Retrieving up an Incline,  such as a Ramp.  If you have a way to tow the Dolly-- you can add also the HA-1 Hitch Adapter.

Note:  Rim Colors May Vary From Color Depicted


Flying Dutchman Sailboat on Trailex SUT-700-U Launching Dolly

Flying Dutchman Sailboat on the Trailex SUT-700-U Super Duty Dolly .  Shown with Front Nose Wheel Option, Two optional Support Pads and the optional Hitch Adapter




 -Multi Point Support - 

With the SUT-700-U Dolly, your Boat can have up to  6 Contact Support Points when you include the optional rear Stabilizer Pads.  The Two Rear Support Bunks  Adjust to fit most hulls. The optional Stabilizer Pads will adjust outward to a total of 73" Wide.  The Rear Support Bunks are Designed to adjust  to provide Rear Transom Support on an Inflatable Boat.   The Dual Pad Front Support easily adjusts to all Boats - providing a Wide Stable Platform for your Boat.


The Trailex SUT-700-U Super Duty Dolly has Multiple Adjustable Support Points - The rear Support Bunks are Especially Useful for Transoms  on Large Inflatable Boats where Extra Support is needed for Motors.  For Wide Boats or Inflatables, the Rear Stabilizer Pad Option is recommended.  Shown with the Optional SP-1 Stabilizer Pads




Additional Photo Coming Soon

     Heavy Duty Aluminum Construction
  Adjustable Rear Support Bunks
  Super Size 18" x 8.5" Pneumatic Tires
  Tandem Axle and Wheels
  Adjustable Tongue Length
  Heavy Duty Front Bunk Support
  Quickly Adjusts from One Boat to Another
  includes Two Web Strap Clips
  Fits Flat , Semi-Vee Boats  
&  Inflatables





The Trailex SUT-700-U Super Dolly Has A Multi-Point Bunk System To Properly Support Any Hull.  All Bunks Are Fully Adjustable And The Optional  Rear Stabilizer Pads add additional support for Wide boats and Inflatables. Shown with the Optional SP-1 Stabilizer Pads





Trailex Universal Launching Dolly - Bow Stop




Bow Stop adjusts to any Position on Handle.  Fits all Boat Bow Styles

Optional SP-1 Stabilizer Pads come in a set of Two.  They will extend over the Tire




SUT-300-U Front Bow Support Detail


Universal Dolly Tongue Adjustment

The Wide Front Bunks Fit Boats 
From Flat Bottoms to Semi-Vees

Quick Adjustment Knobs Let  you
 Change Tongue Length Easily

The Front Bow Support can be positioned anywhere Along the Rear Tongue Section Length.



HA-1 Hitch Adapter for Towing; For SUT-300-U Dolly

HA-1 Hitch Adapter 

  • 1-7/8" Hitch Coupler 

  • Low speed and short distance towing only

  • Hitch Option for your Dolly 
    allows towing with an 
    ATV, Golf Cart or a Vehicle

  • Off-Road use only




Trailew Web strap Clip Option
FWSC Option

Trailew Web strap Clip Option Set of Four Clips

Includes Two  Tie Down points for Web Straps or Bungee Cords - Order Optional  FWSC to  add extra tie down points  to secure boat. Easily adjusts to any position by sliding.


FWSC Option includes Four Sliding Square Eyebolts.  These can be installed on any side of a  member on the unit  that has a slot and then locked in place by tightening the nuts.  




Nose Wheel Option for Trailex Dolly     Nose Wheel Option for Trailex Dolly
NW-2  Nose Wheel Option   Typical  Position on Dolly 






Model SUT-700-U
Super Size Wheel Option

$ 1099.00 

+ FREE Shipping (48 USA)



HA-1  Hitch  Adapter
 for Towing -1-7/8"

$ 143.00

+ FREE Shipping (48 USA)
NW-2  Nose Wheels
Two Front 15" X 6" Wheels for Front Support

$ 219.95


+ FREE Shipping (48 USA
SP-1 Stabilizer Pads for Inflatables and Wide Boats $ 99.95  
FWSC (Set of 4 web strap clips)


$ 29.95  



Please Note That With The Four Super Size Wheels, This Dolly May Float Up When Launching In The Water To Retrieve Your Boat.  If This Happens, Simply Placing Your Foot On The Tongue Will Allow You To Submerge The Dolly.

Also Note That If You Have A  Heavy Boat, It Will Take More Than One Person To Move The Boat, Especially Through Soft Sand, or when Retrieving up an Incline,  such as a Ramp. If you have a way to tow the Dolly-- you can also add the HA-1 Hitch Adapter.




  • Large Dories up to 20'
  • Skiffs up to 20'
  • Wherries up to 20'
  • Fishing Boats up to 16'
  • SemiVee Boats up to 16'
  • Jon Boats up to 16'
  • Inflatable Boats up to 16'
  • RIB up to 15'
  • Sailboats up to 20'

*Within Dolly Weight Capacity
Add  Boat & Motor Total Weights



Fits These Popular 
Larger Models and More

AB Inflatable Boats
Achilles Inflatable Boats
American Sail Sailboats
Avon Inflatable Boats
Bauer Sailboats
Beetle Cat Sailboat
Boston Whaler Boats
Caribe Inflatable Boats
Catalina Sailboats
CL 16 Sailboat
Fishing Boats to 16'
Flying Dutchman Sailboat
FSI Inflatable Boats
Genesis RIB (Walker Bay)
Gig Harbor Boats
Hunter Sailboats
Inflatable Boats to 15'
Life Boats
Maxxon Inflatable Boats
Mercury Inflatable Boats
Melges  Scow 17
MC Scow, Super Scow
Novurania Inflatable Boats
O'Day 16 Daysailer
Tanzer Sailboat
Vanguard Sailboats
Whitehall Boats
Zodiac Inflatable Boats




Trailex T-bolt

Trailex T-Bolt with nut

  • Patented T-Bolt Construction

  • Fully Adjustable

  • Heads of bolts slide to any position.

  • Requires only one wrench to tighten

  • Lock nuts on all bolts 

  • Strong & lightweight

Trailex Extrusion & T-Bolt





See Action Videos
Trailex Dolly Owners  love to post Videos.  See the Latest Action Videos



Trailex SUT-300-U Dolly Video



Find Your Boat's Dolly Model 
Click Here 





Trailex Universal SUT-350-SD Sling Dolly
Sling  Style Universal  
Beach Launching Dolly

See Our Universal Sling  Style  Dolly for Many  Boats Under 350 lbs.

Sailboats, Canoes, 
Kayaks, Jon Boats 
and Smaller Inflatables


Trailex Universal Beach Lunching Dolly-menu-3 
Bunk Style Universal  
Beach Launching Dolly

See Our Universal  Bunk Style Dolly For  Boats Under 300 lbs.

Sailboats, Canoes, 
Kayaks, Jon Boats 
and  most Inflatables





SUT-700-U Dolly
Assembly Instructions





Escape Sailboat Trailer Zuma Sailboat Trailer




American Express Visa Mastercard Discover


 Castlecraft is a BBB Accredited Boat Dealer in Braidwood, IL



All prices, specifications and availabilities subject to change without notice

copyright Castle Equipment Co.  1997-2014