Tractor Trailer Tandem Axle Simulator
Interactive Training Simulator • Load Placement
Practice tandem slides + cargo positioning with real-time axle shifts.
Tandem Axle Simulator for Cargo Spread & Load Placement
Stop guessing. Train how pallet position and tandem placement affect steer, drives, trailer, and gross — before you roll.
Built for quick reps: set equipment, add multiple cargo blocks (feet or inches), slide tandems, and export scenarios for training review.
Cargo units
Feet / Inches
Fast reps without manual conversion
Tandems
Slide + Learn
See steer/drives/trailer shifts live
Export
JSON • CSV • PDF
Save scenarios for coaching + review
The Truck Ledger • Simulator
Axle Weight Simulator (Tandem • Spread • Drop Axle • Bridge)
Status: Waiting…
Engine: —
Unit & Setup
Pick a template, then fine-tune sliders and geometry. Expert mode unlocks custom truck settings.
Load & Weight
Choose total freight weight and where it sits (CG). Use pallet mode in Expert for row-by-row realism.
CG position: — ft (0 = at kingpin, higher = farther back)
Slide: — holes (negative = forward, positive = back)
5th: — notches (negative = forward, positive = back)
Share: —% of “drive group” carried by drop axle
Expert Mode • Custom Truck Settings off
Enable Expert Mode
Unlock geometry + axle spacing + pallet mode presets.
Expert mode is for “your exact truck/trailer.” If you don’t know a value, leave the template defaults.
Scale Results
Live axle predictions + bridge check + legality flags. Export includes full geometry + assumptions.
Vehicle Visual
Trailer —
Drop —
Tandems —
5th —
Steer —
Drives —
Drop —
Trailer —
Kingpin: —
Bridge max: —
Outer span: —
Spread: —
Steer
——
Drives
——
Trailer Group
——
Gross
——
Steer axle
—
Drive tandem
—
Drop axle
—
Trailer axles
—
Coach Mode
Actionable moves (tandems / 5th / drop share) based on your current setup.
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Disclaimer: This is a static estimator. Real scales can vary due to suspension, grade, load shift, and equipment specifics.