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 2020 Freightliner M2 106 Cummins L9 Day Cab Truck

$9,500

speed 133,151 mi

location_on

Penske Used Trucks

Jackson, MS (987.8 mi)

Used 2022 Freightliner Cascadia - photo 1

Used 2022 Freightliner Cascadia - photo 2

Used 2022 Freightliner Cascadia Detroit DD13 Day Cab Truck

$71,500

speed 390,038 mi

location_on

Penske Used Trucks

Jackson, MS (987.8 mi)

Used 2020 Freightliner Cascadia - photo 1

Used 2020 Freightliner Cascadia - photo 2

Used 2020 Freightliner Cascadia Cummins X15 Sleeper Truck

$72,000

speed 495,830 mi

location_on

Penske Used Trucks

Jackson, MS (987.8 mi)

Used 2021 Freightliner Cascadia - photo 1

Used 2021 Freightliner Cascadia - photo 2

Used 2021 Freightliner Cascadia Detroit DD15AT Sleeper Truck

$72,750

speed 527,611 mi

location_on

Penske Used Trucks

Jackson, MS (987.8 mi)

Used 2020 Freightliner Cascadia Detroit DD15AT Sleeper Truck

$74,750

speed 465,227 mi

location_on

Penske Used Trucks

Jackson, MS (987.8 mi)

Used 2021 Freightliner Cascadia Detroit DD15AT Sleeper Truck

$64,250

speed 619,201 mi

location_on

Penske Used Trucks

Jackson, MS (987.8 mi)

Used 2021 Freightliner M2 106 Cummins L9 Day Cab Truck

$58,250

speed 100,573 mi

location_on

Penske Used Trucks

Jackson, MS (987.8 mi)

Used 2020 Freightliner Cascadia Cummins X15 Sleeper Truck

$68,000

speed 555,111 mi

location_on

Penske Used Trucks

Jackson, MS (987.8 mi)

Used 2021 Freightliner Cascadia Detroit DD15AT Sleeper Truck

$63,250

speed 629,317 mi

location_on

Penske Used Trucks

Jackson, MS (987.8 mi)

Used 2020 Freightliner Cascadia Cummins X15 Sleeper Truck

$70,000

speed 527,192 mi

location_on

Penske Used Trucks

Jackson, MS (987.8 mi)

Used 2021 Freightliner Cascadia Detroit DD15AT Sleeper Truck

$57,750

speed 692,305 mi

location_on

Penske Used Trucks

Jackson, MS (987.8 mi)

Used 2017 Freightliner Cascadia - photo 1

Used 2017 Freightliner Cascadia - photo 2

Used 2017 Freightliner Cascadia Detroit DD15AT Semi Trucks / Tractors

$26,750

speed 410,636 mi

sell

Key features

DD15AT
4x2
Day Cab

location_on

Penske Used Trucks

Tacoma, WA (990.3 mi)

Used 2020 Freightliner Cascadia Detroit Diesel DD15 Sleeper Truck

$57,771

speed 613,658 mi

location_on

Ryder Used Trucks

Tacoma, WA (990.3 mi)

Used 2019 Freightliner Cascadia - photo 1

Used 2019 Freightliner Cascadia - photo 2

Used 2019 Freightliner Cascadia Detroit DD13 Day Cab Truck

$26,495

speed 509,112 mi

location_on

Ryder Used Trucks

Tacoma, WA (990.3 mi)

Used 2019 Freightliner Cascadia Detroit Diesel DD15 Sleeper Truck

$62,393

speed 556,739 mi

location_on

Ryder Used Trucks

Tacoma, WA (990.3 mi)

Used 2020 International LT Cummins X15, Signature Sleeper Truck

$53,550

speed 493,891 mi

location_on

Ryder Used Trucks

Tacoma, WA (990.3 mi)

Used 2020 Freightliner Cascadia Detroit Diesel DD15 Day Cab Truck

$36,542

speed 581,856 mi

location_on

Ryder Used Trucks

Tacoma, WA (990.3 mi)

Used 2020 Freightliner Cascadia Detroit Diesel DD15 Day Cab Truck

$46,631

speed 498,460 mi

location_on

Ryder Used Trucks

Tacoma, WA (990.3 mi)

Used 2016 Freightliner Cascadia - photo 1

Used 2016 Freightliner Cascadia - photo 2

Used 2016 Freightliner Cascadia Cummins ISX Day Cab Truck

$25,000

speed 506,712 mi

location_on

Ryder Used Trucks

Tacoma, WA (990.3 mi)

Used 2020 Freightliner Cascadia Detroit DD13 Day Cab Truck

$53,250

speed 284,268 mi

location_on

Penske Used Trucks

Tacoma, WA (990.3 mi)

Used 2017 Freightliner M2 106 Cummins ISL Day Cab Truck

$48,750

speed 131,472 mi

location_on

Penske Used Trucks

Tacoma, WA (990.3 mi)

Used 2020 Freightliner Cascadia Detroit Diesel DD15 Sleeper Truck

$33,426

speed 965,182 mi

location_on

Ryder Used Trucks

Tacoma, WA (990.3 mi)

Used 2020 Freightliner Cascadia Detroit Diesel DD15 Day Cab Truck

$39,390

speed 560,119 mi

location_on

Ryder Used Trucks

Tacoma, WA (990.3 mi)

Used 2019 Freightliner Cascadia Detroit Diesel DD15 Day Cab Truck

$32,995

speed 547,970 mi

location_on

Ryder Used Trucks

Tacoma, WA (990.3 mi)

Used 2020 International LT Cummins X15, Signature Sleeper Truck

$41,685

speed 625,724 mi

location_on

Ryder Used Trucks

Tacoma, WA (990.3 mi)

Used 2022 Freightliner Cascadia Detroit Diesel DD15 Sleeper Truck

$51,868

speed 750,104 mi

location_on

Ryder Used Trucks

Tacoma, WA (990.3 mi)

Used 2019 Freightliner Cascadia Detroit DD13 Day Cab Truck

$34,495

speed 591,119 mi

location_on

Ryder Used Trucks

Tacoma, WA (990.3 mi)

Used 2020 Freightliner Cascadia Detroit Diesel DD15 Day Cab Truck

$46,031

speed 470,220 mi

location_on

Ryder Used Trucks

Tacoma, WA (990.3 mi)

Used 2019 Freightliner Cascadia Detroit Diesel DD15 Day Cab Truck

$57,333

speed 181,493 mi

location_on

Ryder Used Trucks

Tacoma, WA (990.3 mi)

Used 2019 Freightliner Cascadia Detroit Diesel DD15 Sleeper Truck

$46,578

speed 746,750 mi

location_on

Ryder Used Trucks

Tacoma, WA (990.3 mi)

Semi Trucks for Sale near Longmont, Colorado

Filters

4,841 results

Applied

Location

Condition

Listing Type

Used 2020 Freightliner M2 106 Cummins L9 Day Cab Truck

Used 2022 Freightliner Cascadia Detroit DD13 Day Cab Truck

Used 2020 Freightliner Cascadia Cummins X15 Sleeper Truck

Used 2021 Freightliner Cascadia Detroit DD15AT Sleeper Truck

Used 2020 Freightliner Cascadia Detroit DD15AT Sleeper Truck

Used 2021 Freightliner Cascadia Detroit DD15AT Sleeper Truck

Used 2021 Freightliner M2 106 Cummins L9 Day Cab Truck

Used 2020 Freightliner Cascadia Cummins X15 Sleeper Truck

Used 2021 Freightliner Cascadia Detroit DD15AT Sleeper Truck

Used 2020 Freightliner Cascadia Cummins X15 Sleeper Truck

Used 2021 Freightliner Cascadia Detroit DD15AT Sleeper Truck

Used 2017 Freightliner Cascadia Detroit DD15AT Semi Trucks / Tractors

Used 2020 Freightliner Cascadia Detroit Diesel DD15 Sleeper Truck

Used 2019 Freightliner Cascadia Detroit DD13 Day Cab Truck

Used 2019 Freightliner Cascadia Detroit Diesel DD15 Sleeper Truck

Used 2020 International LT Cummins X15, Signature Sleeper Truck

Used 2020 Freightliner Cascadia Detroit Diesel DD15 Day Cab Truck

Used 2020 Freightliner Cascadia Detroit Diesel DD15 Day Cab Truck

Used 2016 Freightliner Cascadia Cummins ISX Day Cab Truck

Used 2020 Freightliner Cascadia Detroit DD13 Day Cab Truck

Used 2017 Freightliner M2 106 Cummins ISL Day Cab Truck

Used 2020 Freightliner Cascadia Detroit Diesel DD15 Sleeper Truck

Used 2020 Freightliner Cascadia Detroit Diesel DD15 Day Cab Truck

Used 2019 Freightliner Cascadia Detroit Diesel DD15 Day Cab Truck

Used 2020 International LT Cummins X15, Signature Sleeper Truck

Used 2022 Freightliner Cascadia Detroit Diesel DD15 Sleeper Truck

Used 2019 Freightliner Cascadia Detroit DD13 Day Cab Truck

Used 2020 Freightliner Cascadia Detroit Diesel DD15 Day Cab Truck

Used 2019 Freightliner Cascadia Detroit Diesel DD15 Day Cab Truck

Used 2019 Freightliner Cascadia Detroit Diesel DD15 Sleeper Truck

Frequently Asked Questions about Semi Trucks / Tractors

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