Originally designed for Canada’s harsh off-road winters, the Collins G7X Super Dolly is built for extreme conditions and extended use. While the Collins G7 is the ultimate in professional, light-duty dolly towing, the G7X goes further with heavy-duty framework, tackling tough harsh road conditions, long-distance hauls and overall demanding wrecker jobs. See how it stacks up below.

Product Highlights

Stronger, Heavier-Duty Build

Engineered with a significantly thicker steel construction, the G7X is built to absorb punishing roadside abuse, deep pothole impacts and rough ditch extractions. The beefy framework outlasts the competition, saving you money on replacements and minimizing fleet downtime.

Solid Steel Hubs and High-Capacity Steel Wheels

Equipped with a strong wheel assembly, the G7X features heavy-duty steel hubs and high-capacity steel wheels. This means zero flexing, warping or cracking when loading up heavy vehicles, giving you absolute peace of mind during high-stress recoveries.

Steel Cross Rail Insert with True-Positive Camber

Featuring Collins’ patented “True Positive Camber” design, the included T12 Hybrid Cross Rails combine adjustable aluminum outer tubes with an ultra-strong steel inner rail. This allows you to safely extend your span up to a massive 104" to accommodate wide vehicles, while ensuring the rails stay perfectly arched and never bow or sag under full load.

5,000-lb. Towing Capacity

Upgrade your fleet’s capabilities to handle heavy-duty trucks, large SUVs and commercial cargo vans with precision. These premium, high-traction tires support an industry-leading 5,000-lb. capacity, providing the biting grip needed to pull heavy loads out of muddy ditches or snowy embankments.

75 mph. Speed Rating

Never be a rolling roadblock on fast-moving highways. Fitted with heavy-duty tires carrying an official "M" speed marking, the G7X allows you to safely maintain expressway speeds up to 75 MPH over long distances, drastically reducing your transit times.

Built for Extreme Winters

Purpose-built to withstand harsh winter weather, the G7X delivers relentless structural resilience against freezing temperatures and corrosive road salt. When standard aluminum dollies slide or freeze up, this rugged system provides the heavy-duty traction and freezing-weather reliability required to get the job done safely.

Specifications

• Dolly Tire Size: 5.00x8 E Rated
• Dolly Cross Rails: T12 Hybrid
• Dolly Wheel Hubs: Steel
• Dolly Wheels: Steel
• Dolly Weight: 228 lbs.
• Dolly Capacity: 5,000 lbs.
• Dolly Speed Rating: 75 MPH
• Replacement wheel and tire combo SKU: WA-5ES
• Replacement tire WA-5TE

Package includes

• Dolly Tire Size: 5.00x8 E Rated
• Dolly Cross Rails: T12 Hybrid
• Dolly Wheel Hubs: Steel
• Dolly Wheels: Steel
• Dolly Weight: 228 lbs.
• Dolly Capacity: 5,000 lbs.
• Dolly Speed Rating: 75 MPH

Accessories

Collins Self Loading Dolly Mount (Pair)

The Self-Loading Dolly Mounts from Collins are ideal for trucks with a taller bed height. These mounts drop down over the body side about 11" were it is then loaded, and then they swing up and back to the storage position. This shock-assist action reduces driver fatigue and back injuries from lifting the side frames over the side of the truck bed. Buy now!

FAQ

Q: What makes the Collins G7X different from the standard G7 Dolly?

A: The G7X “Super Dolly” is specifically engineered for extreme, heavy-duty and off-road rural recovery conditions. Unlike the standard G7, the G7X features thicker steel construction, heavy-duty steel hubs, high-capacity steel wheels and steel cross-rail inserts to survive harsh winter environments and abusive towing conditions.

Q: What is the maximum weight capacity of the Collins G7X Dollies?

A: The Collins G7X features an industry-leading load capacity of up to 5,000 lbs. per pair, supported by aggressive, high-traction Load Range E (5.00 x 8) tires.

Q: What is the safe speed rating for towing with the Collins G7X Super Dolly?

A: The 5.00 x 8 tires on the G7X carry a speed marking of "M", which represents a safe towing speed rating of up to 75 MPH on expressways and highways.

Q: What is the recommended tire pressure (PSI) for the G7X Dolly?

A: To ensure safe operations, maximum load capacity and proper tire wear, Collins recommends maintaining a tire pressure of 120–125 PSI.

Q: Where can I find replacement parts like spindles or rail ends for the G7X?

A: Zip’s carries a full inventory of official Collins Manufacturing replacement components, including right/left spindle assemblies, replacement rail ends, tie-down straps, and hardware specifically engineered to fit the HSD-G7X model.

Q: How do I know if the heavy-duty Collins G7X is the right model for my fleet?

A: Choosing the right dolly depends heavily on the average curb weight of the vehicles you tow, the terrain you operate in, and how often the equipment is deployed. While standard, lighter-weight dollies are great for quick, short-distance highway runs with light passenger cars, the heavier-duty build of the G7X is designed specifically for extreme weather, high-mileage expressway trips and rugged off-road recoveries. To break down all the key differences, check out our comprehensive Tow Dolly Buying Guide on the Zip’s blog to make sure you make the right investment for your truck.

Tow operators need to make the most of their time on every call. That’s why they turn to the Collins G7 HERO Hi-Speed Dolly. Other dolly options just can't keep up. Each set of the G7 HERO features lightweight, aluminum materials that are easier to maneuver and place under the towed vehicle. Featuring greaseable hubs, the high-speed axle means tow operators are no longer restricted on towing distance and speed. Finish each call sooner so you can move onto the next one with a set of Collins G7 Hero dollies from Zip’s.

Product Highlights

Ultra-Lightweight Aluminum Build

Designed to help you work fast and efficiently, the G7 HERO features premium aluminum components including aluminum wheels, cross rails and a lightweight pry bar. By drastically reducing the physical effort required to lift, transport and position the dollies, this system helps prevent operator injuries and keeps your team moving safely.

Greaseable Aluminum Hubs and Aluminum Wheels

Engineered for long-term durability and effortless maintenance, the HERO line features specialized greaseable aluminum hubs paired with high-strength aluminum wheels. This setup provides smooth rotation, exceptional heat dissipation, and simple servicing to maximize your uptime.

Patented Positive Camber Axles

Eliminating rail sag and dragging on bumpy roads, the HERO line axles are engineered with a precise, engineered bend. The slight bend creates a true positive camber that actively supports the vehicle when fully loaded, ensuring maximum ground clearance and significantly reducing your steering effort during tight turns.

Up to 4,280 lbs. Towing Capacity

Upgrade your light-to-medium fleet capabilities with two high-performance tire options. Choose between the agile 4.80 x 8 setup supporting 3,968 lbs. or step up to the robust 5.70 x 8 configuration to safely handle up to 4,280 lbs. of vehicle weight.

No Towing Distance Restrictions

Pull with total confidence across city lines or across the country. These tow dollies are rigorously tested and fully approved for continuous freeway, highway and interstate use—proven to comfortably handle over 1,600 freeway miles in a single, uninterrupted tow.

Integrated Secure Ratchet System

Equipped with more built-in safety features than any other dolly manufacturer on the market, the system utilizes a rugged, integrated ratchet tie-down mechanism. Once clicked into place, you know the towed vehicle is locked down tight and isn't going anywhere.

Flexible 104" Usable width

Seamlessly adapt to any vehicle track width on the fly. The aluminum cross rails easily collapse down to a compact 66" for clean, space-saving storage on your truck, and smoothly telescope out to a maximum usable width of 104" to secure wider cars and SUVs.

Specifications

4.80 x 8

5.70 x 8

• Weight:
• 4.80: 169 lbs.
• 5.70: 185 lbs.
• Maximum load capacity:
• 4.80: 3,968 lbs.
• 5.70: 4,280 lbs.
• Dolly cross rail: aluminum
• Dolly wheel hubs: aluminum
• Dolly wheels: aluminum
• Usable length: 104”
• Collapsed storage length: 66”
• Recommended tire inflation: 100 PSI

Package includes

1. Two dollies
2. Aluminum cross rails
3. Pry bar
4. Tie-down straps

Accessories

Collins Self Loading Dolly Mount (Pair)

The Self Loading Dolly Mounts from Collins are ideal for trucks with a higher bed height. These mounts drop down over the body side about 11" to a comfortable loading height. They then swing up and back to the storage position. This design reduces driver fatigue and back injuries from lifting the side frames over the side of the truck bed. Buy now!

In The Ditch has added a security feature to their Simple Dolly Mounts to discourage and ultimately prevent tow dolly theft on light-duty wreckers. The new Locking Simple Mount comes in three sizes—XD, Standard and Short—and, depending on the model, accommodates 5.70 or 4.80 wheels. Inserted over the dolly axle, the L-shaped retaining clip fits over the locking tab and is secured by a padlock or locking pin. These mounts are made from steel and come in a durable powder-coated finish. Each mount is sold individually so two brackets are required to make a set.

Product Highlights

Fast & Simple Security

Locking down your gear is simple. Just set your Speed® Dolly or XD™ Dolly into the cradle and slide a standard padlock straight through the integrated eyelet positioned on top of the mount.

Interchangeable Modular Footprint

The mounting platform footprint is identical to the premium ITD Integrated Speed® Mount and standard Speed® Mount series. As a result, you can swap out or upgrade brackets across your fleet using your existing drill pattern without putting new holes in your truck deck.

Commercial-Grade Steel Fabrication

Each bracket is manufactured from heavy-gauge structural steel and covered in a weather-resistant black powder-coat finish. This rugged layer ensures maximum resistance to road salt, moisture, scratching and heavy impacts over years of service on the road.

Specifications

XD

• Used with 5.70 tires
• Fits XD Dolly only
• Weight: 6 lbs.

Standard

• Used with 4.80 tires
• Fits Speed Dolly only
• Weight: 7 lbs.

Short

• Used with 4.80 tires
• Fits Speed Dolly only
• Weight: 6 lbs.

FAQ

Q: Which In The Ditch dolly models are compatible with the Simple Locking Mount?

A: The In The Ditch Simple Locking Dolly Mount is available in three distinct configurations to match your specific towing setup. The Standard and Short models are precision-engineered to fit the ITD Speed® Dolly with 4.80 tires. The XD model is specifically designed to fit the ITD XD™ Dolly with 5.70 tires.

Q: Can I replace my existing ITD brackets with the Simple Locking Mount without drilling new holes?

A: Yes. The mounting platform footprint of the Simple Locking Dolly Mount features an interchangeable modular footprint that is 100% identical to the premium ITD Integrated Speed® Mount and standard Speed® Mount series. This allows you to upgrade or swap brackets across your fleet using your existing truck deck drill patterns.

Q: What is the difference between the Standard and Short ITD Simple Locking Mount variations?

A: While both variants are designed exclusively for the ITD Speed® Dolly utilizing 4.80 tires, they feature different deck clearances. The Standard model has an overall height of 9.5 inches and a weight of 7 lbs. The Short model drops down to an overall height of 7.0 inches and a weight of 6 lbs., making it ideal for compact spaces or tight low-profile deck configurations.

Q: What material and finish are used to protect the ITD Simple Locking Mount from rust?

A: Each mount is manufactured from heavy-gauge structural steel built for rigorous commercial use. To prevent rust, corrosion and damage from road salt, moisture or heavy impacts, the steel is completely sealed in a rugged, weather-resistant Endurance Tuff Coat Black powder-coat finish.

Tow dollies take more abuse than most equipment. They’re low to the ground, constantly exposed to road debris and the elements and always running behind the drive tires. That’s why In The Ditch’s X-Series SLX Tow Dolly Set is built for lasting strength, performance and ease of use.

Available in two sizes, this professional-grade system combines lightweight aluminum components with zinc-plated or powder-coated frames for maximum corrosion resistance. The ergonomic carry handle is balanced for smooth, controlled positioning, and the Speed-Lube hub design makes bearing maintenance effortless with a center grease zerk for quick, even lubrication.

Like every X-Series model, the SLX wheel features a patented cam-lock with a spring-loaded pin for easy engagement with the breakover bar. A positive camber on the axle also ensures straight, stable towing. Choose your preferred model: Standard Duty (SD): 4.80 tires, 3,040-lb capacity or Extreme Duty (XD): 5.70 tires, 4,000-lb capacity.

Product Highlights

Speed Lubrication Hubs

Convenient grease zerk fitting allows for quick, easy lubrication, keeping your dollies performing smoothly with minimal maintenance. Extended, longer-than-ever axles with added snap button holes allow for greater adjustability.

Wide Compatibility

Handles both 4.8 and 5.7 tires, giving you the flexibility to tow vehicles up to 4,000 lbs. without needing multiple dollies.

Positive Camber Axles

The positive camber design preloads under load, improving stability and extending dolly tire tread life.

Ergonomic Design

University-tested and proven as the most ergonomic dolly design available. The billet carry handle shifts weight for easier transport over any distance.

Built to Last

High-strength, lightweight construction ensures long-lasting durability, even under heavy use.

Heavy Duty Aluminum Rims

Aluminum composition for corrosion resistance and longevity. Only rims rated to 100 PSI with a 1,000 lb. carrying capacity.

Cam-Lock Simplicity

Innovative dolly cam-locks allow you to secure wheels without ratcheting mechanisms, making it faster and safer while allowing you to keep both hands on the breakover bar.

Effortless Maneuverability

Equipped with two breakover bar insertion points per dolly, allowing the wheels to roll smoothly between parked cars and narrow spaces instead of being carried into position.

Maximum Clearance

Provides ample space to fully push back the breakover bar, making it easier to cam spindles over and pull vehicles from tight spaces.

How it works

Specifications

Models Available

Standard Duty (SD): 3,040 lbs.

Extreme Duty (XD): 4,000 lbs.

Finishes Available

Endurance Powder Coat

• Black gloss color
• Superior adhesion
• Resists peeling and rust

Zinc Plates

• Shiny, metallic finish
• Corrosion resistance
• Strengthens frame

Accessories

In The Ditch T-Handle for Axles

#ITD-22092

Steel mount adapter for 4th generation X-Series axle.

In the Ditch X-Series 4th Gen Axle Replacement

#ITD-1751

Extruded aluminum tube axle designed to handle SUVs and cars with wider stances.

In The Ditch Modular Speed Mounts

#ITD-4665-L

Bolts directly to the steel wrecker body, suspending the dolly cradle over the composite side.

In The Ditch Simple Locking Dolly Mount

#ITD-1564

Securely locks past and current In the Ditch SD Dollies.

Tow dollies take a lot of abuse, given their low profile, close proximity to the road surface and undesirable position behind the drive axles. Make sure your set is up to the challenge with the built-in durability and longevity of In The Ditch’s X-Series XL dolly set.

Available in two sizes, this professional dolly system features aluminum parts to reduce weight and resist the elements. The frames are available with either a zinc-plated and powder-coated finish, and the carry handle is ergonomically designed to balance the load as the operator moves the dollies into position.

As with any X-Series model, In The Ditch has added a fifth adjustment hole to widen the dolly combination to 85", and the wheels feature a patented cam-lock design with a spring-loaded pin to engage the dollies with the breakover bar. The positive camber ensures a straight pull down the road.

The Standard Duty (SD) tow dolly comes with 4.80 tires and offers a capacity of 3,040 lbs. The Extreme Duty (XD) option includes 5.70 tires and can carry 4,000 lbs. The XL dollies offer low-maintenance operation, as the sealed hub never needs to be greased. Should they wear out over time, the bolt-on spindles are easy to replace. Scroll down to learn more.

Product Highlights

Automotive Grade Sealed Hubs

Maintenance-free hubs deliver reliable performance and long-lasting lubrication to save time and eliminate downtime. Extended, longer-than-ever axles with added snap button holes for greater adjustability.

Wide Compatibility

Handles both 4.8 and 5.7 tires, giving you the flexibility to tow vehicles up to 4,000 lbs. without needing multiple dollies.

Positive Camber Axles

The positive camber design preloads under load, improving stability and extending dolly tire tread life.

Ergonomic Design

University-tested and proven as the most ergonomic dolly design available. The billet carry handle shifts weight for easier transport over any distance.

Built to Last

High-strength, lightweight construction ensures long-lasting durability, even under heavy use.

Heavy Duty Aluminum Rims

Aluminum composition for corrosion-resistance and longevity. Only rims rated to 100 PSI with a 1,000 lb. carrying capacity.

Cam-Lock Simplicity

Innovative dolly cam-locks allow you to secure wheels without ratcheting mechanisms, making it safer, faster and keeping both hands on the breakover bar.

Effortless Maneuverability

Equipped with two breakover bar insertion points per dolly, allowing the wheels to roll smoothly between parked cars and narrow spaces instead of being carried into position.

Maximum Clearance

Provides ample space to fully push back the breakover bar, making it easier to cam spindles over and pull vehicles from tight spaces.

How it works

Specifications

Models Available

Standard Duty (SD): 3,040 lbs.

Extreme Duty (XD): 4,000 lbs.

Finishes Available

Endurance Powder Coat

• Black gloss color
• Superior adhesion
• Resists peeling and rust

Zinc Plates

• Shiny, metallic finish
• Corrosion resistance
• Strengthens frame

Accessories

In The Ditch T-Handle for Axles

#ITD-22092

Steel mount adapter for 4th generation X-Series axle.

In the Ditch X-Series 4th Gen Axle Replacement

#ITD-1751

Extruded aluminum tube axle designed to handle SUVs and cars with wider stances.

In The Ditch Modular Speed Mounts

#ITD-4665-L

Bolts directly to the steel wrecker body, suspending the dolly cradle over the composite side.

In The Ditch Simple Locking Dolly Mount

#ITD-1564

Securely locks past and current In the Ditch SD Dollies.