Saf-T-Liner® HDX – Activity

Ideal weight distribution for the long haul.

Saf-T-Liner® HDX - Carolina ThomasPack up the local ski team, youth group or brass band. The Saf-T-Liner® HDX from Thomas Built Buses was designed to make even the longest bus excursions feel like a quick jaunt. Heavy-duty shock absorbers take on any terrain, from mountain roads to narrow city streets, while the rear engine design keeps the ride nice and quiet for the driver. Options like coach-style seating, pass-through under body storage, overhead luggage racks and air conditioning add comfort for up to 90 passengers. Yet, for all the attention paid to comfort, nothing is more important than Thomas Built Buses’ unwavering commitment to safety, demonstrated by the drive to meet or often exceed FMVSS. And with Carolina Thomas, there’s always support nearby when you need it.

Get a quote


  • Passenger capacity
    Up to 90
  • Wheelbase
    181″, 209″, 238″, 267″, 277″
  • GVWR
    Up to 36,200 lbs.
  • Engine
    Cummins® ISB 220-300 HP, ISL 260-300 HP with SCR Clean Diesel technology
  • Green option
    CNG – Cummins ISL G 250-280 HP

Saf-T-Liner® HDX Standard Features - Carolina ThomasDRIVABILITY/COMFORT

  • 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
  • 45-degree steering angle
  • Engine compartment completely insulated for reduced noise
  • 78″ headroom


  • Exterior electrical access door
  • Streamlined electrical center for easy identification and access
  • Fuse relay centers provide circuit protection and easy diagnostics
  • Front access panel
  • Drop-frame design at engine location
  • Engine compartment accessible via three doors plus access panel
  • Easy access to fluids
  • Display of fault codes in dash
  • Lights equipped with plug-in connectors

OPTIONS (Partial Listing)

  • Wheelchair lift
  • Adjustable pedals
  • Air suspension driver’s seat
  • Air ride suspension
  • AM/FM radio/CD/PA
  • Remote control/heated mirrors
  • Various seat options available:
    • Bench seat without belts
    • Bench seat with lap belts
    • Bench seat with 3-point lap/shoulder belts
    • ISO latch seat
    • Integrated child seat
    • Coach-style seating
  • Child reminder system
  • LED light packages
  • Acoustical ceiling
  • Underbody pass-through luggage storage area
  • Overhead luggage racks
  • Tinted windows
  • Staggered passenger seating
  • Customer accessory module for aftermarket component hookup
  • Exterior graphics
  • Customizable paint designs

Saf-T-Liner® HDX Safety - Carolina ThomasDecade after decade, Thomas Built Buses has followed one simple philosophy: “design and build the kind of bus that we’d want our own children to ride in”. It’s a simple idea and it works. Passenger safety is the number one priority and every activity bus Thomas manufactures meets or exceeds all Federal Motor Vehicle Safety Standards for Multi-Function School Activity Buses (MFSAB).


  • 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


  • Large two-piece curved bonded windshield
  • Specially developed integrated mirror system