The higher pricing of natural gas powered heavy trucks along with their limited amount of fueling stations is stunting the increased sales that experts predicted. Nearly 10,500 of the natural-gas-powered heavy duty trucks are expected to sell this year, according to Power Systems Research. That would be a 20% increase from the 8,730 sold last year. Many experts predicted sales would double last years, nearing 16,000 vehicles.
Continue reading Natural Gas Truck Sales Not What Experts ExpectedCategory: Blog – Diesel Engine News & Updates
Cummins N14 Inframe Rebuild Kit – Additional Items
We’re discussing some inexpensive additional pieces you should think about changing when you rebuild your Cummins N14. The Cummins N14 is a strong, reliable engine that will just keep on going if you treat it right. Depending on how much weight you’re pulling, the average rebuild is needed around 800k to 1 million miles. The standard N14 inframe kit will come with nearly everything you need to rebuild the engine. Here’s a look at some of the additional pieces that are a good idea to change while performing the rebuild. The nice thing is, they won’t break the bank.
Continue reading Cummins N14 Inframe Rebuild Kit – Additional ItemsBrake Air Compressor Troubleshooting – Simplified
If you’re reading this you probably already know at least a little something about diesel brake air compressors. So we won’t bore you with the simple stuff.
Continue reading Brake Air Compressor Troubleshooting – SimplifiedNew MPG Standards for Highway Trucks
In a historic decision by Obama Administration, new fuel efficiency standards for medium and heavy-duty trucks have been passed. These stricter standards, legislation passed as part of President Obamas mounting efforts to combat the effects of climate change, aims to cut fuel consumption and boost fuel efficiency for vehicles weighing 8,500 pounds or more by March 2015. These regulations, to be drafted by the Environmental Protection Agency and the Transportation Department, are then expected to be finalized by March 31, 2016.
Continue reading New MPG Standards for Highway TrucksPreventive Maintenance Inspection (PMI): Do it Properly to Increase Profits
Do you like it when your truck breaks down unexpectedly? Probably not. No one does. But what can you do about it? A Preventive Maintenance Inspection (PMI) is a simple way to prevent costly repairs and breakdowns and maximize uptime. Whether you manage an entire fleet of trucks, or if you’re an owner/operator with just one truck, conducting regular inspections is a great, low-cost, high-reward practice. Among other things, PMI can improve your profitability, prevent customer service problems, and, perhaps most importantly, increase safety. There are many things that can cause your engine issues, possibly leading to an overhaul, and regular inspections can help you spot these earlier on.
Continue reading Preventive Maintenance Inspection (PMI): Do it Properly to Increase ProfitsTrucking Facts: Looking to the Future
Did you know, if you combined all of the cargo delivered by diesel trucks last year, you would create a chain that would run from the Earth to the Moon over eleven times?
Continue reading Trucking Facts: Looking to the FutureHighway and Heavy Parts (HHP) Now Has Engine Rebuild Kits For Caterpillar C13 Engine Applications
Highway and Heavy Parts (HHP) now has aftermarket engine overhaul rebuild kits to fit Caterpillar C13 Engine applications. These previously un-available kits are now in stock for immediate delivery. These kits feature OEM quality parts at cost savings over 30%.
Continue reading Highway and Heavy Parts (HHP) Now Has Engine Rebuild Kits For Caterpillar C13 Engine ApplicationsSemi-Truck Dimensions Guide: Length, Width, Height, and Weight
Semi-trucks are not all built the same – but most follow a standard size range designed to meet federal regulations and operate efficiently on U.S. highways.
Understanding these dimensions is important for:
- Route planning
- Bridge clearance
- Load compliance
- Safety and maneuverability
This guide breaks down standard semi-truck dimensions and explains how those measurements are built.
Standard Semi-Truck Dimensions
A typical tractor-trailer combination in the United States falls within a consistent range:
| Measurement | Standard Range |
|---|---|
| Overall Length | 70–80 feet |
| Trailer Length | 48–53 feet |
| Width | 8 feet 6 inches (102 inches) |
| Height | About 13 feet 6 inches |
| Gross Vehicle Weight | Up to 80,000 pounds |
These are baseline measurements used across most highway applications. Exact dimensions may vary depending on equipment and state regulations.
How Tractor and Trailer Length Work Together
The total length of a semi-truck is not simply the tractor length plus the trailer length.
That’s because part of the trailer sits over the tractor at the fifth wheel.
A typical setup includes:
- Tractor: about 20 feet
- Trailer: up to 53 feet
- Overlap between tractor and trailer
This overlap is what keeps the overall length closer to 70–80 feet instead of exceeding it.
The type of tractor also plays a role. Day cabs and sleeper cabs can vary slightly in wheelbase and overall length, depending on configuration.
Trailer Types and Configurations
Different trailers are designed for different types of freight. While many fall within standard dimensions, their structure and use vary.
Dry Van and Reefer Trailers
These are the most common trailers on the road. They are used for general freight and temperature-controlled goods.
Flatbed Trailers
Flatbeds are used for oversized or irregular loads that cannot be enclosed. Cargo height determines total vehicle height.
Tanker Trailers
Tankers are designed to carry liquids. Their size varies based on capacity and weight distribution requirements.
Step Deck and Double Drop Trailers
These trailers sit lower to the ground, allowing taller freight to stay within legal height limits.
Pup Trailers and Doubles
Shorter trailers, often around 28 feet, are sometimes pulled in pairs depending on the route and regulations.
👉 The key difference between these trailers is not just size—but how they handle weight, height, and cargo.
Height and Clearance Considerations
Most semi-trucks are designed to stay within a standard height of about 13 feet 6 inches.
This height exists for a reason:
- Bridge clearances
- Overpasses
- Tunnels
- Loading docks
Even though many highways are designed with higher clearances, not all routes are.
👉 Drivers must always verify height restrictions before entering a route—especially in older infrastructure or urban areas.
Width and Lane Compatibility
The standard width for a semi-truck is 8 feet 6 inches (102 inches).
This aligns with standard U.S. highway lane widths, which are typically around 12 feet.
While the truck body fits within this width, mirrors and safety equipment extend beyond it. That’s why the total mirror-to-mirror width can approach 10 feet.
👉 Any load exceeding standard width is considered oversized and requires permits.
Weight Limits and Load Distribution
The maximum gross vehicle weight for a standard tractor-trailer is generally 80,000 pounds.
This includes:
- The truck
- The trailer
- Fuel
- Driver
- Cargo
Weight limits are also applied at the axle level:
- Single axle: up to 20,000 pounds
- Tandem axle: up to 34,000 pounds
These limits are designed to protect:
- Roads and bridges
- Tires and suspension systems
- Braking performance
👉 Proper weight distribution is just as important as total weight.
Why Semi-Truck Dimensions Matter
Truck dimensions are not just about compliance—they directly affect performance and operation.
They influence:
- Turning radius
- Fuel efficiency
- Stability under load
- Route accessibility
- Safety in tight spaces
A truck that exceeds legal dimensions may require:
- Special permits
- Route planning
- Escort vehicles
- Restricted travel times
State Regulations and Variations
Federal guidelines provide a baseline for commercial vehicle dimensions, but states can adjust rules based on local conditions.
This means:
- Length allowances may vary
- Height limits can differ
- Weight restrictions may change based on road type
👉 For standard highway trucking, most equipment is built to fit within widely accepted limits. However, specialized freight often requires additional planning.
Final Takeaway
A standard semi-truck in the United States follows a consistent set of dimensions built around safety, infrastructure, and performance.
While most trucks fall within the same general size range, variations in tractor type, trailer configuration, and cargo can change how those dimensions apply in real-world use.
Understanding these measurements helps drivers, fleets, and operators make better decisions when it comes to routing, loading, and compliance.
Call 844-304-7688 or visit highwayandheavyparts.com to get the right diesel engine parts for your application.
From diagnosis through delivery, we’re Highway and Heavy Parts.
Highway & Heavy Parts Adds New Parts To Inventory For Increased Coverage
Highway and Heavy Parts (HHP) is pleased to announce the addition of a wide range of new products to their existing line of diesel engine components. These new products include an array of cost-saving components for Caterpillar’s 3406E, C11, C15 and C13 engine applications as well as oversize repair options for Cummins Midrange Engines and fuel system parts for Detroit Diesel Series 60 engines. The addition of these new products to HHP’s already extensive catalogue of parts has helped them expand their coverage of diesel engine applications and better serve the needs of the heavy highway industry.
Continue reading Highway & Heavy Parts Adds New Parts To Inventory For Increased CoverageIncrease Profit with Remanufactured Injectors From HHP!
When it comes to running a highly profitable diesel engine repair shop, staying one step ahead of your competition is critical to success. With profit margins shrinking and customer demands becoming more and more complex, vendors are constantly searching for ways to cut costs and streamline operations, all without having to sacrifice the quality of their service. Though this has proved to be a difficult task for a lot of repair shops, many are discovering that making the switch from OEM parts to remanufactured components may be the answer, and Highway and Heavy Parts (HHP) is helping them do that.
Continue reading Increase Profit with Remanufactured Injectors From HHP!Why Diesel Repair Shops Lose Time and Money on Parts (And How to Fix It)
For most diesel repair shops and fleet operations, the part itself isn’t the problem.
👉 It’s everything that happens before and after the part arrives.
Delays, miscommunication, pricing inconsistencies, and slow returns all add up to:
- Lost time
- Lost revenue
- Frustrated customers
And in many cases, those issues repeat themselves on every job. In most cases, the delay in a repair job isn’t caused by the failure: it’s caused by the process around fixing it.
Continue reading Why Diesel Repair Shops Lose Time and Money on Parts (And How to Fix It)Got a Sprinter? HHP’s Got The Parts
Highway and Heavy Parts Midland Michigan is pleased to announce the release of a new comprehensive product line for Sprinter engines! The latest parts feature pistons with GRAFAL skirt coating, NI-Resist top ring carrier, oil cooling, profile pin bores, phosphate coating and a size and configuration range to cover any Sprinter need. All that simply means: Why look anywhere else?
Continue reading Got a Sprinter? HHP’s Got The Parts
