What are the most popular brands of semi trucks in the US?

The most popular semi truck brands in the US, known for their reliability, performance, and widespread use, include: Freightliner: Explore our current Freightliner semi truck listings here. International: Find your next International semi truck here. Peterbilt: Browse all available Peterbilt semi trucks for sale. Kenworth: View our selection of Kenworth semi trucks. Volvo: Discover Volvo semi trucks currently available. Mack: See our inventory of Mack semi trucks.

How many miles is too many on a used semi truck?

A well-maintained semi truck engine is built to run 750,000 to over 1,000,000 miles before a major overhaul. Mileage alone isn't the right filter — service history, engine condition, and whether the truck has had any major powertrain work matter more. A 600,000-mile truck with documented maintenance and recent engine work can be a better buy than a 400,000-mile truck with no service records.

Should I buy a day cab or sleeper semi truck?

It depends on your operation. If your routes are regional or local and drivers return home nightly, a day cab is the more practical and cost-efficient choice — it's lighter, simpler, and less expensive to maintain. If you're running long-haul or OTR freight where drivers spend nights on the road, a sleeper provides the comfort and compliance with hours-of-service regulations that an OTR operation requires.

Can I search semi trucks by location on Comvoy?

Yes. Comvoy lets you filter semi truck listings by location so you can find trucks available near you or in a specific state — reducing transport costs and making it easier to inspect before you buy. You can also filter by make, model year, mileage, and price to narrow results to your exact spec.

How much weight can a semi truck carry?

The legal limit for a loaded semi-truck in the US is 80,000 pounds, though the actual capacity can vary depending on the truck and trailer configuration.

How many gears do semi trucks have?

They can have up to 18 gears, providing the necessary torque and power for hauling heavy loads efficiently.

How much fuel do semi trucks use?

Fuel efficiency varies depending on engine size, load weight, and driving conditions, but expect lower mpg than cars, typically around 5-8 mpg.

Do you need a special license to drive a semi truck?

Yes, a Commercial Driver's License (CDL) with specific endorsements is required to operate a semi-truck legally.

What are the challenges of being a truck driver?

Long hours on the road, loneliness, traffic congestion, and dealing with varying weather conditions are some of the challenges truck drivers face.

What kinds of trailers can semi trucks haul?

Semi trucks can haul many different types of trailers. The most commonly hauled trailers are dry vans, reefers, flatbeds, tankers, and lowboys.

Semi Trucks for Sale near Longmont, Colorado

Used 2019 International LT Cummins X15, Signature Day Cab Truck

$33,993

speed 459,223 mi

location_on

Ryder Used Trucks

Bolingbrook, IL (893.6 mi)

Used 2022 Freightliner Cascadia - photo 1

Used 2022 Freightliner Cascadia - photo 2

Used 2022 Freightliner Cascadia Detroit Diesel DD15 Sleeper Truck

$59,014

speed 644,292 mi

location_on

Ryder Used Trucks

Bolingbrook, IL (893.6 mi)

Used 2020 Freightliner Cascadia - photo 1

Used 2020 Freightliner Cascadia - photo 2

Used 2020 Freightliner Cascadia Detroit DD13 Day Cab Truck

$34,495

speed 504,116 mi

location_on

Ryder Used Trucks

Bolingbrook, IL (893.6 mi)

Used 2020 International LT Cummins X15, Signature Semi Trucks / Tractors

$42,000

speed 324,851 mi

sell

Key features

X15'17 400/1800
SBA 6x4

location_on

Ryder Used Trucks

Bolingbrook, IL (893.6 mi)

Used 2020 Freightliner Cascadia Detroit Diesel DD15 Sleeper Truck

$62,651

speed 559,438 mi

location_on

Ryder Used Trucks

Bolingbrook, IL (893.6 mi)

Used 2020 Freightliner Cascadia Detroit DD13 Day Cab Truck

$55,570

speed 373,999 mi

location_on

Ryder Used Trucks

Bolingbrook, IL (893.6 mi)

Used 2021 Freightliner Cascadia - photo 1

Used 2021 Freightliner Cascadia - photo 2

Used 2021 Freightliner Cascadia Detroit Diesel DD15 Sleeper Truck

$65,904

speed 539,960 mi

location_on

Ryder Used Trucks

Bolingbrook, IL (893.6 mi)

Used 2021 Freightliner Cascadia Detroit Diesel DD15 Sleeper Truck

$47,302

speed 847,163 mi

location_on

Ryder Used Trucks

Bolingbrook, IL (893.6 mi)

Used 2022 Freightliner Cascadia Detroit Diesel DD15 Sleeper Truck

$46,379

speed 845,941 mi

location_on

Ryder Used Trucks

Bolingbrook, IL (893.6 mi)

Used 2022 Freightliner Cascadia Detroit Diesel DD15 Sleeper Truck

$52,355

speed 710,323 mi

location_on

Ryder Used Trucks

Bolingbrook, IL (893.6 mi)

Used 2022 Freightliner Cascadia Detroit Diesel DD15 Sleeper Truck

$53,864

speed 702,181 mi

location_on

Ryder Used Trucks

Bolingbrook, IL (893.6 mi)

Used 2019 Freightliner Cascadia - photo 1

Used 2019 Freightliner Cascadia - photo 2

Used 2019 Freightliner Cascadia Detroit Diesel DD15 Day Cab Truck

$26,500

speed 790,416 mi

location_on

Ryder Used Trucks

Bolingbrook, IL (893.6 mi)

Used 2023 Freightliner Cascadia - photo 1

Used 2023 Freightliner Cascadia - photo 2

Used 2023 Freightliner Cascadia Detroit DD15 Sleeper Truck

$58,313

speed 696,520 mi

location_on

Ryder Used Trucks

Bolingbrook, IL (893.6 mi)

Used 2020 Freightliner Cascadia Detroit Diesel DD15 Sleeper Truck

$61,184

speed 575,730 mi

location_on

Ryder Used Trucks

Bolingbrook, IL (893.6 mi)

New 2027 Kenworth W990 Cummins ISX / X15 Sleeper Truck

$226,026

location_on

MHC Internet Truck Sales

Memphis, TN (897.5 mi)

Used 2022 Freightliner Cascadia Detroit DD15AT Sleeper Truck

$80,000

speed 518,053 mi

location_on

Penske Used Trucks

Houston, TX (896.8 mi)

Used 2021 Peterbilt 579 Paccar MX/MX-13 Day Cab Truck

$39,950

speed 404,014 mi

location_on

MHC Internet Truck Sales

Memphis, TN (897.5 mi)

Used 2023 Peterbilt 579 Paccar MX/MX-13 Sleeper Truck

$69,950

speed 395,000 mi

location_on

MHC Internet Truck Sales

Memphis, TN (897.5 mi)

Used 2023 Kenworth T680 Paccar MX/MX-13 Sleeper Truck

$74,950

speed 389,000 mi

location_on

MHC Internet Truck Sales

Memphis, TN (897.5 mi)

Used 2021 Peterbilt 579 Paccar MX/MX-13 Day Cab Truck

$39,950

speed 405,023 mi

location_on

MHC Internet Truck Sales

Memphis, TN (897.5 mi)

Used 2023 Kenworth W900 Cummins GX Sleeper Truck

$199,950

speed 45,083 mi

location_on

MHC Internet Truck Sales

Memphis, TN (897.5 mi)

Used 2022 Kenworth T680 Cummins ISX / X15 Sleeper Truck

$72,950

speed 377,710 mi

location_on

MHC Internet Truck Sales

Memphis, TN (897.5 mi)

Used 2022 Peterbilt 579 Paccar MX/MX-13 Sleeper Truck

$50,950

speed 546,814 mi

location_on

MHC Internet Truck Sales

Memphis, TN (897.5 mi)

Used 2023 Kenworth T680 Paccar MX/MX-13 Sleeper Truck

$55,950

speed 531,963 mi

location_on

MHC Internet Truck Sales

Memphis, TN (897.5 mi)

Used 2022 Freightliner Cascadia Detroit Diesel DD15 Day Cab Truck

$40,495

speed 632,150 mi

location_on

Ryder Used Trucks

Memphis, TN (901.3 mi)

Used 2021 Freightliner M2 106 Cummins L9 Day Cab Truck

$60,750

speed 100,189 mi

location_on

Penske Used Trucks

Memphis, TN (901.3 mi)

Used 2021 Freightliner Cascadia Detroit DD15AT Sleeper Truck

$68,000

speed 562,960 mi

location_on

Penske Used Trucks

Memphis, TN (901.3 mi)

Used 2022 Freightliner Cascadia Detroit Diesel DD15 Day Cab Truck

$34,500

speed 826,242 mi

location_on

Ryder Used Trucks

Memphis, TN (901.3 mi)

Used 2020 Freightliner Cascadia Detroit Diesel DD15 Sleeper Truck

$50,145

speed 687,283 mi

location_on

Ryder Used Trucks

Memphis, TN (901.3 mi)

Used 2018 Freightliner Cascadia - photo 1

Used 2018 Freightliner Cascadia - photo 2

Used 2018 Freightliner Cascadia Detroit DD13 Day Cab Truck

$20,995

speed 591,827 mi

location_on

Ryder Used Trucks

Memphis, TN (901.3 mi)

Semi Trucks for Sale near Longmont, Colorado

Filters

4,841 results

Applied

Location

Condition

Listing Type

Used 2019 International LT Cummins X15, Signature Day Cab Truck

Used 2022 Freightliner Cascadia Detroit Diesel DD15 Sleeper Truck

Used 2020 Freightliner Cascadia Detroit DD13 Day Cab Truck

Used 2020 International LT Cummins X15, Signature Semi Trucks / Tractors

Used 2020 Freightliner Cascadia Detroit Diesel DD15 Sleeper Truck

Used 2020 Freightliner Cascadia Detroit DD13 Day Cab Truck

Used 2021 Freightliner Cascadia Detroit Diesel DD15 Sleeper Truck

Used 2021 Freightliner Cascadia Detroit Diesel DD15 Sleeper Truck

Used 2022 Freightliner Cascadia Detroit Diesel DD15 Sleeper Truck

Used 2022 Freightliner Cascadia Detroit Diesel DD15 Sleeper Truck

Used 2022 Freightliner Cascadia Detroit Diesel DD15 Sleeper Truck

Used 2019 Freightliner Cascadia Detroit Diesel DD15 Day Cab Truck

Used 2023 Freightliner Cascadia Detroit DD15 Sleeper Truck

Used 2020 Freightliner Cascadia Detroit Diesel DD15 Sleeper Truck

New 2027 Kenworth W990 Cummins ISX / X15 Sleeper Truck

Used 2022 Freightliner Cascadia Detroit DD15AT Sleeper Truck

Used 2021 Peterbilt 579 Paccar MX/MX-13 Day Cab Truck

Used 2023 Peterbilt 579 Paccar MX/MX-13 Sleeper Truck

Used 2023 Kenworth T680 Paccar MX/MX-13 Sleeper Truck

Used 2021 Peterbilt 579 Paccar MX/MX-13 Day Cab Truck

Used 2023 Kenworth W900 Cummins GX Sleeper Truck

Used 2022 Kenworth T680 Cummins ISX / X15 Sleeper Truck

Used 2022 Peterbilt 579 Paccar MX/MX-13 Sleeper Truck

Used 2023 Kenworth T680 Paccar MX/MX-13 Sleeper Truck

Used 2022 Freightliner Cascadia Detroit Diesel DD15 Day Cab Truck

Used 2021 Freightliner M2 106 Cummins L9 Day Cab Truck

Used 2021 Freightliner Cascadia Detroit DD15AT Sleeper Truck

Used 2022 Freightliner Cascadia Detroit Diesel DD15 Day Cab Truck

Used 2020 Freightliner Cascadia Detroit Diesel DD15 Sleeper Truck

Used 2018 Freightliner Cascadia Detroit DD13 Day Cab Truck

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