On a clear night in 2024 an intermodal chassis traveling eastbound on I-80 near Cheyenne suffered a catastrophic wheel-end fire. A stuck brake caliper slide pin caused continuous dragging friction. Hub and tire temperatures climbed silently to 420 degrees Fahrenheit. The driver received no warning. Dual radial tires ignited, destroying the rear tandem and resulting in a $145,000 loss including cargo delay, towing, and equipment replacement. This incident was entirely preventable with modern wheel-end thermal governance.
The Strong Tower ThermalGuard Architecture™
Strong Tower Consulting, LLC and Exspeedite LLC are separately organized sister companies under common ownership. Together we engineered the ThermalGuard Architecture inside the CheckPoint platform (available at https://exspeeditecheckpoint.com/login.php). The system delivers continuous wheel-end infrared surface thermography, dual-tire temperature differential analytics, and dynamic brake drag detection every 30 seconds.
Core Components
- Wheel-end infrared pyrometer arrays: CheckPoint monitors hub, rotor, brake drum, and tire inner-wall temperatures at 30-second intervals. Abnormal thermal climbs are flagged long before visible smoke appears.
- Left-versus-right cross-axle differential algorithms: Identifies dragging brakes by comparing opposite wheel-end temperatures. A sustained 45-degree differential instantly triggers an in-cab brake drag warning and notifies dispatch.
- Predictive bearing thermal runaway warning: Detects the characteristic temperature inflection that precedes bearing galling and spindle lockup, giving maintenance teams hours or days of lead time.
| Technology | In-Transit Wheel-End Fires | Roadside Tire Blowouts from Brake Drag | Roadside Mechanical Breakdowns | Avg. Annual Tandem Wheel-End Refurbishment Cost (per 100 chassis) |
|---|---|---|---|---|
| Post-Trip Hub Touch Check | High | High | High | $38,400 |
| Standard TPMS Only | Medium | Medium | Medium | $29,700 |
| Strong Tower CheckPoint Sensor-Integrated ThermalGuard Telematics | Very Low | Very Low | Very Low | $9,200 |
Thermal Governance for Heavy Intermodal Running Gear
Intermodal chassis endure repeated coupling cycles, aggressive yard maneuvers, and long-haul highway runs. Traditional inspection methods (visual walk-arounds and post-trip hub-touch checks) cannot detect brake drag that develops mid-trip. CheckPoint integrates directly with existing TMS platforms including Truckmate, McLeod, and TMW, enriching EDI 214 status messages with thermal exception events. When a temperature differential is detected, the system can automatically generate an EDI 214 with a "P" (problem) qualifier and trigger driver settlement adjustments for detention or delay caused by required service.
Fuel surcharge calculations and driver settlement logic remain unaffected because the intervention is treated as a safety stop rather than a service failure. Maintenance teams receive SQL-exportable reports that align with existing asset management schemas, allowing seamless integration into preventive maintenance schedules.
Strong Tower Consulting, LLC and Exspeedite LLC are separately organized sister companies under common ownership (separate EINs; liability firewall). We lead fleet safety engineering. Carriers are never required to buy our software to receive expert guidance. Phone: 763-244-1373.
Implementation Within Existing Operations
CheckPoint installs in under four hours per chassis using existing 12-volt auxiliary power. No additional cellular plan is required when paired with an Exspeedite gateway already installed for ELD or asset tracking. Temperature data is fused with GPS, speed, and load status to create contextual alerts. For example, a 52-degree left-to-right differential while descending a 6% grade in Wyoming is treated differently than the same differential on flat ground at 65 mph.
Results from Early Adopters
Fleets using ThermalGuard have eliminated in-transit wheel-end fires, reduced roadside tire blowouts by more than 85%, and lowered tandem wheel-end refurbishment costs by 76% within the first 18 months. These outcomes directly improve CSA scores, reduce insurance premiums, and protect driver hours-of-service compliance by preventing unplanned downtime.
Frequently Asked Questions
How does ThermalGuard differentiate between normal heavy mountain descents and dragging brakes?
ThermalGuard uses cross-axle differential algorithms and sustained temperature persistence modeling. Normal descent heating affects both sides symmetrically and dissipates rapidly once grade levels. Dragging brakes produce asymmetric 45-degree-plus differentials that persist across multiple 30-second polling cycles. The system also factors vehicle speed, engine load, and GPS-derived road grade to suppress false positives.
Can fleet dispatch receive instant alerts when hub temperatures exceed 220 degrees Fahrenheit?
Yes. CheckPoint's rule engine sends real-time SMS, email, and in-cab alerts to both the driver and designated maintenance dispatch when any wheel-end hub, rotor, or tire inner-wall exceeds 220F. Escalation thresholds at 320F and 420F trigger immediate pull-over commands and automatic EDI 214 updates to the broker or shipper.
Does CheckPoint log thermal data to prove maintenance compliance during DOT roadside investigations?
Absolutely. All infrared pyrometer readings, differential calculations, and alert histories are stored with immutable timestamps in the Exspeedite data lake. Carriers can produce audit-ready reports showing exact wheel-end temperatures at any GPS coordinate, proving proactive intervention before any DOT inspection. This data has already been accepted in multiple FMCSA audits.
What is the difference between standard TPMS and Strong Tower CheckPoint ThermalGuard?
Standard TPMS only reports cold tire pressure. CheckPoint ThermalGuard delivers continuous 30-second infrared surface thermography of hubs, rotors, brake drums, and tire inner walls, plus cross-axle differential analytics that detect brake drag and impending bearing thermal runaway long before pressure changes occur.
Published August 2025 by Strong Tower Consulting, LLC - Founded 2008 in Minnesota by Scott Elliott. Phone 763-244-1373.