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Saf-T-Liner® HDX.
Ideal weight distribution for the long haul.

School bus routes come in all shapes and sizes: short and hilly, long and bumpy or all of the above. The Saf-T-Liner® HDX from Thomas Built Buses is built to handle them all. This model is designed to keep drivers comfortable, with features like standard tilt and telescoping steering wheel and optional adjustable pedals. It offers a pleasant ride for up to 90 passengers with air conditioning, coach-style seating and heavy-duty shock absorbers. And because safety is important to everyone, each HDX school bus meets or exceeds FMVSS and CMVSS. Finally, to help you keep your HDX buses safe, efficient and comfortable, Thomas Built developed one of the most extensive dealer networks in the industry.

Passenger capacity

Up to 90


181″, 209″, 238″, 267″, 277″


Up to 36,200 lbs.


Detroit™ DD8™ 260-300 hp
Cummins® B6.7 220-300 hp
Cummins® L9 260-300 hp
Cummins® L9N 250-280 hp


Zonar® V3™ advanced telematics system
Detroit™ Connect™ available on DD8 engine
(available late 2018)

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  • Ergonomic driver’s dash and switch panel
  • Easy-to-read offset gauge cluster
  • Tilt and telescoping steering wheel
  • Suspended brake and accelerator pedals
  • Foot rest
  • Up to 50-degree wheel cut
  • Sound isolator over engine
  • 78″ headroom
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Safety Features

Decade after decade, Thomas Built Buses has followed one simple philosophy: design and build the kind of school bus we’d want our own children to ride in. It’s a simple idea and it works. Passenger safety is our number one priority and every bus we manufacture meets or exceeds all FMVSS and CMVSS for school buses.

  • Meets or exceeds FMVSS/CMVSS
  • Roof bows extend to bottom of side panels
  • Double rear bumper with exterior contoured steel bumper
  • Double-bolted body mounting clips
  • Fuel tank mounted between frame rails
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Available Options
  • Wheelchair lift
  • Adjustable pedals
  • Air suspension driver’s seat
  • Air ride suspension
  • Heated driver’s seat
  • Front and rear bulkhead air conditioning
  • AM/FM radio, CD player and PA system
  • Remote controlled heated mirrors
  • Reading lights
  • Variety of seating options:
    – Bench seat without belts, with lap belts, with 3-point belts
    – Integrated child seat
    – Coach-style seat
  • Child reminder system
  • Interior LED lighting packages
  • Acoustical ceiling
  • Underbody pass-through storage area
  • Overhead book racks
  • White roof
  • Tinted windows
  • Staggered passenger seating
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  • Exterior electrical access door
  • Streamlined electrical center for easy identification and access
  • Accessory module for customer aftermarket component hookup
  • Fuse relay centers provide circuit protection and easy diagnostics
  • Front access panel
  • “S” shape drop-frame design at engine location
  • Engine compartment accessible via three doors plus access panel
  • Easy access to fluids
  • In-dash fault code display
  • Lights equipped with plug-in connectors
Driver Visibility
  • Large two-piece curved bonded windshield
  • Exterior mirror cluster with flat and convex rearview mirrors and front crossover mirrors
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