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 Castle Rock, Colorado

Used 2023 Freightliner Cascadia - photo 1

Used 2023 Freightliner Cascadia - photo 2

Used 2023 Freightliner Cascadia Detroit DD15AT Sleeper Truck

$55,000

speed 803,222 mi

location_on

Penske Used Trucks

Aurora, CO (25.5 mi)

Used 2023 Freightliner Cascadia Detroit DD15AT Sleeper Truck

$60,000

speed 756,454 mi

location_on

Penske Used Trucks

Aurora, CO (25.5 mi)

Used 2021 Freightliner Cascadia - photo 1

Used 2021 Freightliner Cascadia - photo 2

Used 2021 Freightliner Cascadia Detroit DD13 Day Cab Truck

$55,750

speed 405,946 mi

location_on

Penske Used Trucks

Aurora, CO (25.5 mi)

Used 2023 International LT Cummins X15 Semi Trucks / Tractors

$42,000

speed 749,988 mi

sell

Key features

X15
SBA 6x4

location_on

Penske Used Trucks

Aurora, CO (25.5 mi)

Used 2020 Freightliner Cascadia - photo 1

Used 2020 Freightliner Cascadia - photo 2

Used 2020 Freightliner Cascadia Detroit DD13 Day Cab Truck

$70,750

speed 226,573 mi

location_on

Penske Used Trucks

Aurora, CO (25.5 mi)

Used 2023 Freightliner Cascadia Detroit DD15AT Sleeper Truck

$66,250

speed 695,780 mi

location_on

Penske Used Trucks

Aurora, CO (25.5 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 129,544 mi

location_on

Penske Used Trucks

Aurora, CO (25.5 mi)

Used 2021 Freightliner Cascadia Detroit DD13 Day Cab Truck

$31,250

speed 672,016 mi

location_on

Penske Used Trucks

Aurora, CO (25.5 mi)

Used 2021 Freightliner Cascadia Detroit DD15AT Sleeper Truck

$82,750

speed 401,538 mi

location_on

Penske Used Trucks

Aurora, CO (25.5 mi)

Used 2022 Freightliner Cascadia Detroit DD15AT Sleeper Truck

$72,250

speed 535,581 mi

location_on

Penske Used Trucks

Aurora, CO (25.5 mi)

Used 2020 Freightliner Cascadia Detroit DD15AT Sleeper Truck

$72,250

speed 376,104 mi

location_on

Penske Used Trucks

Aurora, CO (25.5 mi)

Used 2021 Freightliner Cascadia Detroit DD15AT Sleeper Truck

$73,750

speed 488,964 mi

location_on

Penske Used Trucks

Aurora, CO (25.5 mi)

Used 2021 Freightliner Cascadia Detroit DD13 Day Cab Truck

$35,000

speed 619,999 mi

location_on

Penske Used Trucks

Aurora, CO (25.5 mi)

Used 2023 Freightliner Cascadia Detroit DD15AT Sleeper Truck

$57,250

speed 782,313 mi

location_on

Penske Used Trucks

Aurora, CO (25.5 mi)

Used 2021 Volvo VNL Volvo D13 TC Semi Trucks / Tractors

$69,750

speed 209,238 mi

sell

Key features

D13 TC
6x4

location_on

Penske Used Trucks

Aurora, CO (25.5 mi)

Used 2021 Freightliner Cascadia Detroit DD15AT Sleeper Truck

$84,250

speed 414,273 mi

location_on

Penske Used Trucks

Aurora, CO (25.5 mi)

Used 2020 International LT International A26 Semi Trucks / Tractors

$38,000

speed 122,278 mi

sell

Key features

A26
SBA 6x4

location_on

Penske Used Trucks

Aurora, CO (25.5 mi)

Used 2023 Freightliner Cascadia Detroit DD15AT Sleeper Truck

$47,750

speed 871,770 mi

location_on

Penske Used Trucks

Aurora, CO (25.5 mi)

Used 2023 Freightliner Cascadia Detroit DD15AT Sleeper Truck

$52,250

speed 830,157 mi

location_on

Penske Used Trucks

Aurora, CO (25.5 mi)

Used 2021 Freightliner Cascadia Detroit DD13 Day Cab Truck

$40,000

speed 576,579 mi

location_on

Penske Used Trucks

Aurora, CO (25.5 mi)

Used 2023 Freightliner Cascadia Detroit DD13 Sleeper Truck

$52,000

speed 836,529 mi

location_on

Penske Used Trucks

Aurora, CO (25.5 mi)

Used 2021 Freightliner Cascadia Detroit DD13 Day Cab Truck

$42,250

speed 557,230 mi

location_on

Penske Used Trucks

Aurora, CO (25.5 mi)

Used 2021 Freightliner Cascadia Detroit DD13 Day Cab Truck

$43,000

speed 550,725 mi

location_on

Penske Used Trucks

Aurora, CO (25.5 mi)

Used 2021 Freightliner Cascadia Detroit DD13 Day Cab Truck

$51,500

speed 501,114 mi

location_on

Penske Used Trucks

Aurora, CO (25.5 mi)

Used 2023 Volvo VNL Volvo D13 TC Semi Trucks / Tractors

$94,000

speed 483,828 mi

sell

Key features

D13 TC
6x4

location_on

Penske Used Trucks

Denver, CO (26 mi)

Used 2020 Freightliner Cascadia Detroit DD15AT Semi Trucks / Tractors

$86,000

speed 167,862 mi

sell

Key features

DD15AT
6x4
Sleeper Cab

location_on

Penske Used Trucks

Denver, CO (26 mi)

Used 2023 Freightliner Cascadia Detroit DD13 Sleeper Truck

$55,000

speed 808,487 mi

location_on

Penske Used Trucks

Denver, CO (26 mi)

Used 2023 Freightliner Cascadia Detroit DD13 Sleeper Truck

$62,000

speed 745,221 mi

location_on

Penske Used Trucks

Denver, CO (26 mi)

Used 2021 Freightliner Cascadia Detroit DD15AT Day Cab Truck

$68,250

speed 302,986 mi

location_on

Penske Used Trucks

Denver, CO (26 mi)

Used 2023 Freightliner Cascadia Detroit DD13 Sleeper Truck

$47,000

speed 884,505 mi

location_on

Penske Used Trucks

Denver, CO (26 mi)

Semi Trucks for Sale near Castle Rock, Colorado

Filters

4,853 results

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Location

Condition

Listing Type

Used 2023 Freightliner Cascadia Detroit DD15AT Sleeper Truck

Used 2023 Freightliner Cascadia Detroit DD15AT Sleeper Truck

Used 2021 Freightliner Cascadia Detroit DD13 Day Cab Truck

Used 2023 International LT Cummins X15 Semi Trucks / Tractors

Used 2020 Freightliner Cascadia Detroit DD13 Day Cab Truck

Used 2023 Freightliner Cascadia Detroit DD15AT Sleeper Truck

Used 2022 Freightliner Cascadia Detroit DD13 Day Cab Truck

Used 2021 Freightliner Cascadia Detroit DD13 Day Cab Truck

Used 2021 Freightliner Cascadia Detroit DD15AT Sleeper Truck

Used 2022 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 Cascadia Detroit DD13 Day Cab Truck

Used 2023 Freightliner Cascadia Detroit DD15AT Sleeper Truck

Used 2021 Volvo VNL Volvo D13 TC Semi Trucks / Tractors

Used 2021 Freightliner Cascadia Detroit DD15AT Sleeper Truck

Used 2020 International LT International A26 Semi Trucks / Tractors

Used 2023 Freightliner Cascadia Detroit DD15AT Sleeper Truck

Used 2023 Freightliner Cascadia Detroit DD15AT Sleeper Truck

Used 2021 Freightliner Cascadia Detroit DD13 Day Cab Truck

Used 2023 Freightliner Cascadia Detroit DD13 Sleeper Truck

Used 2021 Freightliner Cascadia Detroit DD13 Day Cab Truck

Used 2021 Freightliner Cascadia Detroit DD13 Day Cab Truck

Used 2021 Freightliner Cascadia Detroit DD13 Day Cab Truck

Used 2023 Volvo VNL Volvo D13 TC Semi Trucks / Tractors

Used 2020 Freightliner Cascadia Detroit DD15AT Semi Trucks / Tractors

Used 2023 Freightliner Cascadia Detroit DD13 Sleeper Truck

Used 2023 Freightliner Cascadia Detroit DD13 Sleeper Truck

Used 2021 Freightliner Cascadia Detroit DD15AT Day Cab Truck

Used 2023 Freightliner Cascadia Detroit DD13 Sleeper Truck

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