School Buses Type D Saf-T-Liner HDX

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.

Saf T Liner HDX School Bus - buswest

Body Specifications

Passenger capacity

Up to 90


Up to 36,200 lbs.


181″, 209″, 238″, 267″, 277″

Engine Options

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


Zonar® V4™ advanced telematics system
Detroit Connect® available on DD8 engine
Cummins® Zonar OTAir™ – 2017 or newer

Thomas Saf t liner c2 School Bus - buswest.jpg
Thomas Saf t liner c2 School Bus - buswest.jpg
Thomas Saf t liner c2 School Bus - buswest.jpg
Thomas Saf t liner c2 School Bus - buswest.jpg


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


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


Large two-piece curved bonded windshield

Exterior mirror cluster with flat and convex rearview mirrors and front crossover mirrors


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


Power and performance? Yes and yes.

The Detroit DD8 is a 7.7L in-line 6-cylinder medium-range engine that boasts a horsepower range of 260-300HP and a torque range of 660–860 foot-pounds for the Saf-T-Liner HDX. Unlike on-highway engines repackaged for medium-duty applications, the DD8 engine is a clean-sheet design, built from the ground up specifically for the medium-duty cycle to deliver the best in efficiency, durability and clean performance. The DD8 engine also features leading-edge technology, including variable exhaust cam phasing which reduces driver interactions with regen. The DD8 comes standard with Detroit Connect Virtual Technician®, a subscription-based remote diagnostic service (free for the first five years) that instantly transmits data to the Detroit Customer Support Center, allowing you to make informed service decisions within minutes of an issue.

Lower total cost of ownership. High performance. Demand it all—and get it—with the DD8 engine.


The longest service intervals in the industry, with up to 55,000-mile* oil and fuel filter change intervals

Maximum uptime with unsurpassed efficiency and exceptional endurance

Power, performance and best-in-class fuel economy and reliability

Easier serviceability with top-load oil and fuel filters

Standard warranty covers the engine and aftertreatment for five years/100,000 miles/160,000 km (whichever comes first), including 100% parts and labor

Extended coverage options available

Variable exhaust cam phasing which allows additional heat to the exhaust stream to promote efficient operation of the aftertreatment system in low speed and stop-and-go operation. This reduces the need for active regen

Adherence to emissions regulations through 2023

*Or 12 months or 1,500 hours, whichever comes first

Propaner C2-School Bus - buswest


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

DD8 engine comes standard with Detroit Connect Virtual Technician remote diagnostic service to help you maximize uptime

Easy access to fluids

In-dash fault code display

Lights equipped with plug-in connectors

Propaner C2-School Bus - buswest

Call us now about our inventory 800-458-9199 to buy your school bus(es) or email us