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Free Shipping on All Trailer Dollies - Mainland USA + Canada
Transformer Trailer Dolly
TransformerMax. 15,000 lbs Gross / 3,000 lbs Tongue 15K-BF 15K-G
Adapters Included 20" Ball Mount50" Kingpin Custom GooseneckMeasurements Required: Height from Ground to Hitch
Maximum Weight Capacity 15,000 lbs GVWR 3,000 lbs Tongue 12,000 lbs GVWR 1,500 lbs Tongue
Hitch Balls 2" & 2 5/16" One Custom Hitch Ball(Measurements Required)
Thrust Washer (Puzzle)
Stabilizer Method Universal Stabilizer Bars:Kingpin Box or Landing Leg Connection Universal Stabilizer Bars:Landing Leg
6.5" Wide Tires
Wireless Controller
Battery Charger
Smart Brake Controller
Two U1 Sealed Batteries
Transformer Trailer Dolly
Transformer Trailer Dolly
Transformer Trailer Dolly
Transformer Trailer Dolly
Transformer Trailer Dolly
Transformer Trailer Dolly
Transformer Trailer Dolly
Transformer Trailer Dolly
Transformer Trailer Dolly
Transformer Trailer Dolly
Transformer Trailer Dolly
Transformer Trailer Dolly
Transformer Trailer Dolly
Transformer Trailer Dolly
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Transformer Trailer Dolly

Max. Weight Capacity: 15 000 lbs Gross. / 3000 lbs Tongue


Max Capacity: 12,000 lbs GVWR
Tongue Weight: 1,500 lbs

Gooseneck Adapter

This is a Custom Item. Before ordering, please Contact Us with the following:

  • Height of your Trailer from the Ground to the Base of your Hitch
  • Hitch Ball Size (Our Gooseneck Adapter Requires a Custom Ball)
  • Trailer Leg Style (For Stabilizer Bar Connection. See below)

Includes 1 Set of Universal Stabilizer Bars:

Choose a connection point on your trailer. We recommend:

  • LANDING LEG Connection: For Trailers with Square legs:
Trailer Legs Styles, Round Left, Square Right

Have any questions? Contact Us.

FREE Shipping on All Trailer Dollies! (Mainland US & Canada Only)

$5,500 USD

  • Psst... Want to save $350 on a used Transformer?

    Get a like-new trailer dolly, for less! View our Open Box Trailer Dolly selection. (While quantities last.)


    Get Intelligent Speed Control and Two 12V U1 Interstate® Batteries standard. Move up to 15,000 lbs with our Wireless Controller for safe, precise parking! See Instruction Manual for details.

    20" Ball Mount Adapter
    Max Capacity: 10,000 lbs GVWR
    Tongue Weight: 1,000 lbs

    • 2 Hitch Balls
    • Thrust Washer & Tightening Bar
    • Stabilizing Ratchet Straps
    • 1 Spacer Plate

      50" Fifth Wheel Adapter
      Max Capacity: 15,000 lbs GVWR
      Tongue Weight: 3,000 lbs

      • Kingpin Adapter
      • U Locking Pin with D-Clip
      • 1 Set of Universal Stabilizer Bars
        • KINGPIN BOX CONNECTIONFor trailers with a hydraulic (Automatic) system.
        • LANDING LEGS CONNECTION: For trailers that have regular, non-hydraulic landing legs with peg holes.

      Gooseneck Adapter
      Max Capacity: 12,000 lbs GVWR
      Tongue Weight: 1,500 lbs

      • This is a Custom Item. Please Contact Us with your trailer measurements from ground to hitch before ordering.


      Intelligent Speed Control™ (ISC)
      Switch between High and Low speed any time for fast or more precise parking. Motor starts and stops gradually to prevent damage to your trailer from sudden stopping. Switch modes with the Wireless Controller!

      BATTERIES INCLUDED: Two pre-installed Interstate®12V U1 Sealed Batteries. Arrive fully charged and ready to move!

      WIRELESS CONTROLLER: Mount on the dolly's handle, or use wirelessly! See exactly where the trailer is at all times and steer within inches of any obstacle.

      Two 1.7 HP MOTORS: Custom 1.7 Hp Bosch Motor for the ultimate power and performance.

      Two FREEWHEEL KNOBS: Engages or disengages Motor from Drive to Neutral to move the dolly without power.

      VOLTMETER: Digital Volt Meter that measures and displays power level of battery.

      CIRCUIT BREAKERS: Protect Motor and Smart Brake from power surges.

      BATTERY CHARGER: Battery tender. Activates when the dolly is plugged into a wall socket. Stops charging automatically when full.

      SMART BRAKE: 7-way power plug that controls the trailer’s electric or surge brakes.

      6.5" WIDE TIRES: Provide plenty of traction on firm grass, packed gravel, asphalt, and on a maximum grade of 4%.

      Learn how to measure the slope of your driveway by watching our video.


      Footprint - 43" L x 29 1/2" W
      Receiver Tube Height: 15.5" from ground

      RUN-TIME1.5 - 2 hrs (Depending on amp draw)




      FLEX AIR PIN BOXES: The Transformer 15k Unit is NOT compatible unless you install a lockout device similar to this.

      TRIPLE AXLE TRAILERS: Please contact us with your trailer specs and use case.

    • Which trailer dolly is right for me?

      To choose the best parking solution for your trailer, you'll need to know:

      • Your trailer's gross weight (GVWR) and tongue weight
      • Your trailer's coupler style, including its height from the ground
      • The types of terrain you'll be moving on (including grade %)
      • If you'd prefer manual, electric or wireless operation

      Compare these details to our trailer dollies and accessories, or contact us.

    • Delivery Timelines

      Provided that stock is available, our products are usually delivered according to the following timelines:

      Mainland USA
      Force 5K & 10K – 1-3 business days
      Transformer 15K – 3-7 business days
      Carrier 13K – 3-7 business days
      Scout 3K – 3-7 business days

      Canada (depending on location)
      Force 5K & 10K – 1-6 business days
      Transformer 15K – 3-10 business days
      Carrier 13K – 3-10 business days
      Scout 3K – 3-10 business days

      For Open Box Trailer Dollies and Accessories, please allow 5-10 business days for delivery, regardless of your location.

      Delivery timelines are subject to change depending on severe weather or stock shortages.

      Force models ship the same day, as long as they are ordered before 5 p.m. EST.

      All Trailer Dollies will require a signature upon delivery. If you would like to waive this requirement, leave us a note at checkout.

      Note: We cannot ship Trailer Dollies to PO Box addresses.


      Shipping Internationally?

      We'd love to hear from you! Please Contact Us with your order and delivery details and we'll send you a shipping quote.

      Free shipping applies to all orders over $600 that are shipped within the mainland USA and Canada.

      Extra shipping costs will apply to the following locations:

      • Hawaii
      • Alaska
      • Vancouver Island, BC
      • Newfoundland and Labrador
      • P.E.I.
      • Yukon and Northwest Territories


      See our FAQ for more information.

    • Your Trailer Dolly is covered by our 2 Year Parts & Repair Warranty! If your Trailer Dolly fails to perform within this time frame, we will work with you to fix the issue and provide replacement parts. Each 12V U1 Battery is covered separately by a 1 Year Interstate® Battery Warranty. Find a Interstate® Service Location near you.

      (Warranties start from your initial date of purchase.)

    • Does each trailer dolly come with everything I need?

      Yes! Each trailer dolly includes a hitch adapter that's compatible with most ball mount trailer couplers. See the TransformerCarrier or Accessories page for additional connections. All electric models include batteries, charging cables, hardware and built-in safety features so you can park with confidence.

      What is the difference between gross weight and dry weight?

      GVWR (Gross Vehicle Weight Rating) includes the capacity of your trailer (how much you can put in it, including passengers). This is different from the dry weight, or unloaded vehicle weight (UVW), which is the weight of your trailer when empty.

      What is trailer tongue weight? Why does it matter?

      Tongue weight is the downward force that the trailer tongue applies to the hitch when connected to the trailer dolly. Using your Parkit360 for a trailer with too much or too little tongue weight could make moving and steering difficult, or cause issues with traction. We recommend that your tongue weight be 10% of your trailer's gross weight (GVWR), although this may vary for smaller trailers.

    • If you are not completely satisfied with your Trailer Dolly, customers in the Mainland US and Canada can return their unit up to 30 days after receiving their dolly for a refund, minus a flat return shipping cost and restocking fee.

      Parts Only and International Trailer Dolly orders are not eligible for return.

      Read our Full Return Policy