0 semi trucks — sleeper and day cab tractors available from dealers nationwide
Semi trucks (also called tractors or 18-wheelers) are Class 8 vehicles built to haul commercial trailers over local, regional, and cross-country routes. TruckRadar aggregates sleeper cab and day cab inventory from dealers across the US, updated daily.
No semi trucks currently available.
Browse all trucksSleeper Trucks
Long-haul OTR tractors with sleeping compartment. Raised-roof, mid-roof, and flat-top models.
Day Cab Trucks
Regional and local tractors without sleeper. Lighter, shorter, built for drivers home nightly.
A semi truck (also called a tractor, 18-wheeler, or big rig) is a Class 8 tractor designed to pull a detachable semi-trailer. The term 'semi' refers to the trailer, which has rear wheels only and rests on the tractor's fifth-wheel coupling. Semi trucks include both sleeper cabs (with a built-in sleeping compartment) and day cabs (without), and are rated for 80,000+ lbs GVW when combined with a loaded trailer.
The dominant brands in the US Class 8 market are Freightliner (Daimler), Kenworth and Peterbilt (both PACCAR), International (Navistar/Traton), Volvo, and Mack. Freightliner holds the largest market share. Western Star, Lonestar, and other models fill specialty niches.
Modern Class 8 engines (Cummins X15, Detroit DD15, PACCAR MX-13) are engineered for 1–1.5 million miles before a major overhaul. A well-maintained truck at 500,000–750,000 miles with service records is still a solid buy. Prioritize maintenance history, engine compression tests, and recent component replacements (injectors, turbos, DPF) over mileage alone.
Yes. Any combination vehicle (tractor + trailer) with a combined GCWR over 26,001 lbs requires a Class A CDL. All Class 8 tractors exceed this threshold. Additional endorsements are required for hazmat (H), doubles/triples (T), and tank vehicles (N).
A sleeper cab has a built-in sleeping compartment behind the driver's seat, enabling long-haul OTR operations where drivers are away for days or weeks. A day cab has no sleeper — it is lighter and more maneuverable, suited for regional, local, and port drayage routes where drivers return home daily. Both pull the same trailers.
Start with the ELD or ECM report — it shows actual engine hours, idle time, and fault codes that don't appear in the odometer reading. High idle hours burn engine life faster than highway miles. Have the DEF system, DPF filter, and EGR valve inspected (each can cost $3,000–$8,000 to repair). Verify the APU or shore power system works. Check the fifth wheel for wear, the frame for cracks, and all air lines for leaks. Always run a VIN history check and review dealer maintenance records.
Used Class 8 semi trucks range from $30,000 for high-mileage older models to $140,000+ for late-model low-mileage units. A 3–5 year old sleeper with 400,000–600,000 documented miles from a fleet typically sells for $60,000–$100,000. Day cabs of the same vintage sell for $15,000–$30,000 less. Prices vary by brand, engine spec, transmission type, and region — markets near ports and distribution hubs tend to be more competitive.