A newly announced vocational platform
Mack introduced Keystone with a new cab and an announced 2027 MP13/mDRIVE context. Confirm production and Canadian order status separately.
Mack Keystone world debut · March 2026 ↗
THE TRACTOR REFERENCE DESK
Mack
Keystone family
A newly announced severe-duty vocational tractor.
01 / FIND YOUR REFERENCE
Choose a reference edition
Start with the model configuration, then choose a publication and explore its documented equipment.
Catalogue reference
Selecting equipment records your research choice. It does not calculate dimensions, establish an available combination or rate a truck.
About this edition & its evidence
Mack Keystone · announced product reference reviewed September 2026. Announced product reference. Confirm production, Canadian order availability and the final build specification. Model-wide maximums are not a rating for every axle or gearbox combination.
Mack Keystone · announced product reference reviewed September 2026 ↗
DIMENSION GUIDE / A–H
Precision visual reference
Select a measurement to highlight its endpoints and see what the chosen publication confirms.
Mack Keystone · Axle-forward Day cab · Announced family · September 2026 review · 1 published / 7 to verify
Published value Needs verificationSchematic · not to scale
A / SIDE VIEW
Bumper to back of cab (BBC)
Front bumper to the back of the driving cab. Excludes an additional sleeper; it is not overall tractor length.
Not verified
No verified value in this reference. Request an actual measurement.
Original illustrative views; not to scale, a certified drawing or a selected-build rendering. Endpoints explain the measurements. Published values come from the cited reference, never from the image.
Selected reference: Mack Keystone · announced product reference reviewed September 2026. Published values remain tied to this edition.
View the complete dimension table ↓02 / THE MEASUREMENTS
Published dimensions
Axle-forward Day cab · Announced family · September 2026 review
| Measurement | Reference value | Scope / how to verify |
|---|---|---|
| Overall height | 150 or 162 in3,810 or 4,115 mm | Two roof-fairing height choices, not a continuous range or bare-cab height. The illustration may omit this equipment.Mack Keystone · announced product reference reviewed September 2026 ↗ |
7 dimensions still to verify · build record / measurement
| Measurement | Reference value | Scope / how to verify |
|---|---|---|
| Bumper to back of cab (BBC) | Not verified | Build record / measurement required. |
| Wheelbase | Not verified | Build record / measurement required. |
| Overall tractor length | Not verified | Build record / measurement required. |
| Cab / body exterior width | Not verified | Build record / measurement required. |
| Width across mirrors | Not verified | Build record / measurement required. |
| Fifth-wheel height | Not verified | Build record / measurement required. |
| Bumper to front axle (BA) | Not verified | Build record / measurement required. |
Planning to transport the truck?
Measure fixed exterior width and mirror width separately, plus overall length, the highest accessory, fifth-wheel height and actual transport weight. Interior bunk width is not exterior width.
03 / UNDER THE SKIN
Powertrain & chassis
MP13 · announced 2027 powertrain. Axle-forward · 4×2 / 6×4 / 8×4 / 8×6 family options. Read engine, gearbox and axle ratings together.
| Measurement | Reference value | Scope / how to verify |
|---|---|---|
| Advertised MP13 maximum power | Up to 540 hp403 kW | Published in the selected manufacturer reference.Mack Keystone · announced product reference reviewed September 2026 ↗ |
| Advertised MP13 maximum torque | Up to 1,950 lb-ft2,644 N·m | Published in the selected manufacturer reference.Mack Keystone · announced product reference reviewed September 2026 ↗ |
Documented cab options
- Day cab
Documented transmissions
- mDRIVE 12 / 13 / 14-speed
- mDRIVE HD · confirm direct, overdrive and creeper variant
- Allison RDS 5 / 6-speed · confirm application
Announced product reference. Confirm production, Canadian order availability and the final build specification. Model-wide maximums are not a rating for every axle or gearbox combination.
04 / MODELS, YEARS & CHANGES
One badge.
Different reference points.
Publication dates and launch milestones do not establish continuous model-year ranges. Match the VIN, production date and equipment era.
Axle-forward and axle-back
The product page distinguishes both axle positions with day, 44 and 64 in cabs. It supplies fairing heights but no numerical BBC in the reviewed text.
Mack Keystone · announced product reference reviewed September 2026 ↗Inspection and build evidence
Treat early manufacturer claims as attributed; verify production truck details and intended-route legality independently.
- production/order status
- factory configuration
- MP13/mDRIVE IDs
- axle/frame ratings
- Canadian warranty/support terms
05 / PUTTING IT TO WORK
Match the trailer to the whole truck.
On/off-road vocational tractor work requires exact axle, suspension, frame and trailer evaluation.
HIGHWAYTRAILERS.CA
Flatbed
Start with deck length, load placement, axle distribution and cab-to-trailer clearance.
Read the guide HIGHWAYTRAILERS.CAStep deck
Compare deck height, gooseneck geometry and the loaded combination’s height.
Read the guide HIGHWAYTRAILERS.CARGN / equipment hauling
Check neck compatibility, fifth-wheel loading, wet-kit requirements and the complete axle layout.
Read the guide HIGHWAYTRAILERS.CAHow trailer capacity works
Review the tractor, coupling, trailer, tyres and load as one combination.
Read the guidePulling a trailer
Confirm build-specific combination, axle, tyre and coupling ratings, kingpin and service connections, clearance and actual axle weights. GVW is the loaded truck; GCW is the loaded combination. Neither is trailer payload.
Moving the tractor as cargo
Give the carrier measured length, exterior and mirror widths, height, ground clearance and transport weight. Assess deck access, breakover, loaded height and securement together.
Deck height & loaded height ↗There is no single “Keystone towing capacity”.
The model badge, artwork and catalogue option selectors cannot rate an individual combination. Obtain the actual build limits and scale weights.
06 / FOLLOW THE EVIDENCE
Sources & open questions
Reviewed September 7, 2026. Manufacturer figures remain tied to their stated reference; converted equivalents are rounded; original source units are retained. Application and inspection notes are editorial guidance.
Reference-specific evidence needed
- Obtain released dimensional drawings, final ordering limits and Canadian production availability.
- Obtain build-specific overall length, exterior and mirror widths, overall height, fifth-wheel height and actual weights.