Greentour

Importance of tyre pressure

Maintaining the correct tyre pressure is the single most effective way to optimise fleet efficiency and ensure road safety. A minor 10% under-inflation can quietly reduce your tread life by up to 15% and increase fuel costs significantly across a large fleet. Keeping your Truck, Bus, and Radial (TBR) tyres properly inflated ensures maximum casing life for multiple retreads, directly lowering your Total Cost of Ownership (TCO).

What should my tyre pressure be?

The ideal inflation is determined by your specific axle load, configuration, and application. Rather than relying on the maximum pressure stamped on the tire sidewall, fleets should always consult the vehicle manufacturer’s guidelines or the tyre brand's official load and inflation tables.

Operating at the precise pressure specified for your actual carrying load guarantees optimal vehicle handling, uniform footprint pressure distribution, and maximum casing durability under grueling long-haul or regional operations.

How to check tyre pressure?

1.Check When Cold：Prerequisite

Always measure pressure when tyres are cold (parked for at least three hours). Driving creates heat, which expands the air and creates falsely high readings.

2.Use a Calibrated Master Gauge：Equipment Check

Press a calibrated commercial dual-foot gauge firmly onto the valve. Never rely on visual guesswork or "thumping" the tyre, as these cannot detect micro-losses.

3.Inspect the Dual Fitment Setup：Crucial for TBR

For dual assemblies, check both inner and outer tires. A pressure mismatch forces one tyre to carry excess load, causing rapid wear and premature failure.

4.Adjust and Secure：Final Action

Inflate or bleed air to match your target specification. Always replace the valve cap tightly to protect the valve core from dirt and road moisture.

Tyres become worn over time

Tread wear is inevitable due to heavy loads and thousands of road kilometers. As tread depth drops, wet grip decreases, which extends braking distances and increases safety risks. For fleets, tracking wear early is vital; it allows for timely rotations to correct irregular wear, preserving the premium casing so it can be retreaded to cut overall costs.

But how do you check tread levels?

Checking tread depth requires moving away from guesswork to a standard routine. Commercial tyres feature built-in Tread Wear Indicators (TWIs)—raised bars in the grooves at the legal wear limit (typically 1.6mm). While TWIs offer a quick visual warning, precise multi-point measurements are necessary to catch uneven wear before it damages the casing.

Steps to measure TBR tread depth

1.Clean the Grooves：Preparation

Park safely on a level surface. Clear any trapped stones or mud from the tread grooves, as debris will block the gauge and distort your measurement.

2.Use a Depth Gauge：Measurement

Insert a calibrated tread depth gauge probe into the major grooves. Push the base firmly against the tyre, making sure not to place the probe on top of a TWI bar.

3.Measure Multiple Points：Diagnostics

Take readings at three locations around the tyre, checking the inner, center, and outer grooves. A variance over 1mm signals irregular wear and the need for an alignment.

4.Log and Plan Retread：Action

Record the millimeter data to track wear rates. Pull tyres before they hit the absolute legal limit to ensure the casing remains healthy and eligible for retreading.

Irregular Tyre Wear

Irregular tread wear—like feathering or one-sided shoulder wear—is usually a clear warning sign of mechanical misalignment, incorrect inflation, or suspension issues. Unlike normal uniform wear, irregular patterns rapidly destroy usable tread, increase vibration, and lower fuel efficiency. If left unchecked, these localized wear zones will permanently damage the tyre's steel belts, ruining a premium casing long before its expected mileage and eliminating any chance of retreading.

Tyre Rotation

Tyre rotation is the proactive maintenance practice of systematically changing tyre positions across different axles. Because steer, drive, and trailer axles subject tires to entirely different forces and loads, tyres naturally wear at varying rates.

Regularly moving tyres around the vehicle—such as swapping inner and outer duals—ensures that every tyre experiences these distinct forces equally, neutralizing early signs of irregular wear.

Benefits of Tyre Rotation

A structured tyre rotation schedule delivers immediate financial benefits by maximising a fleet's total efficiency.

Equalising tread wear across all wheel positions directly extends the service mileage of the entire tyre set, delaying costly replacements. Furthermore, by preventing deep irregular wear and preserving a flat footprint, you safeguard the casing's integrity, ensuring the tyre remains in prime condition for multiple retread life cycles.

Tyre Balance

Tyre balance refers to the even distribution of mass within a tyre and wheel assembly. When a tyre rotates, even a tiny weight variance can create a powerful centrifugal force, leading to heavy vibrations at highway speeds. Unlike alignment issues, improper balance causes severe hop or wobble, which accelerates tread wear and stresses critical suspension components. Keeping commercial tyres perfectly balanced ensures a smooth, stable ride and protects your fleet investment from premature wear.

When to Balance

Commercial tyres should always be balanced immediately upon initial mounting or whenever a tyre is dismounted for a puncture repair.

For ongoing maintenance, fleets should rebalance assemblies whenever a driver reports steering wheel vibrations, or during routine tyre rotations. If you notice unusual, spotty tread wear—often called cupping or scalloping—it is a clear sign that the wheel assembly is out of balance and requires immediate technical attention.

How Wheels are Balanced

To balance a commercial wheel assembly, a technician places it on a high-speed spin balancer that detects exactly where the heavy and light spots are located. The machine guides the technician to attach specialised, heavy-duty weights to the wheel rim, neutralising the imbalance.

For heavy truck tyres, electronic balancers pinpoint precise weight placement, ensuring the entire assembly spins perfectly true and runs smoothly under heavy cargo loads.

Critical Indicators for TBR Tire Replacement

Knowing exactly when to replace a commercial tyre is vital for maintaining fleet safety and avoiding costly roadside breakdowns. While reaching the legal tread wear limit (typically 1.6mm) is the most obvious cue, tyres must be replaced immediately if they show deep sidewall cuts, bulging, exposed steel cords, or severe irregular wear that compromises structural integrity. Proactively pulling a tyre before total failure not only prevents dangerous blowouts on the highway but also ensures the premium casing remains completely undamaged, keeping it in prime condition for successful retreading.

Tyre Tips

Guide to Wet Driving

Driving commercial vehicles on wet roads demands enhanced handling, braking, and water-evacuation performance from your tyres. Because of the extreme weight and longer stopping distances of heavy-duty trucks and buses, understanding wet-weather risks and taking proper precautions is critical for fleet safety.

Challenges of Driving on Wet Roads

Wet road conditions can be exceptionally hazardous for commercial vehicles. High speeds on standing water can cause heavy truck tyres to hydroplane, lifting the tread off the pavement and causing a catastrophic loss of steering and braking control. Furthermore, reduced road grip on wet surfaces drastically extends stopping distances and increases the risk of dangerous trailer jackknifing.

Safety Precautions for Wet Driving

Worn tyres with shallow tread depths cannot evacuate water effectively, making routine tread inspections vital before any long-haul journey. Drivers should proactively reduce vehicle speed well before entering a turn and maintain a steady, controlled pace. If traction is compromised, avoid sudden braking or aggressive steering inputs. Instead, ease off the accelerator, keep the steering wheel straight, and allow the tyres to regain a firm grip on the road.

Guide to Eco Driving

Eco-driving is a highly effective operational strategy to combat high fuel costs and reduce fleet emissions, ensuring that every commercial journey maximizes fuel economy and promotes environmental sustainability.

1. Maintain Steady Speed

Avoid rapid, aggressive acceleration and sudden, hard braking. Train drivers to utilise cruise control on open highways to maintain a consistent speed, which significantly improves fuel efficiency and reduces drivetrain stress.

2. Reduce Idle Time

Minimize unnecessary engine idling during loading, unloading, or rest breaks. Turning off the engine during extended stationary periods directly cuts fuel waste and slashes carbon emissions across your fleet.

3. Keep Tyres Properly Inflated

Under-inflated tyres create more rolling resistance, lowering fuel efficiency. Check tyre pressure regularly for optimal performance.

4. Lighten Your Load

Avoid overloaded configurations and properly distribute freight weight across axles. Eliminating unnecessary deadweight and ensuring cargo is aerodynamic helps maximize kilometres-per-litre performance and prevents severe tyre casing fatigue.

5. Plan Efficient Routes

Utilise advanced fleet routing to bypass congested metropolitan areas and heavy traffic bottlenecks. Planning trips to minimize stop-and-go driving keeps heavy vehicles moving at efficient cruising speeds, directly lowering fuel usage and reducing your fleet's carbon footprint.