Heat Resistance in Drive Wheels: What You Need to Know

Heat is a common cause of premature drive wheel wear, but it does not always    come from the surrounding environment. A polyurethane drive wheel can also    generate heat internally as it repeatedly deforms under load.

Forklifts, AGVs, pallet trucks, ovens, heat-treatment lines and industrial    transport systems may therefore require different approaches to temperature    management.

This guide explains    drive wheel heat resistance, the difference between    ambient temperature and internal heat build-up, and the information buyers should    provide when selecting a wheel for warm or continuous-duty applications.

Two Sources of Drive Wheel Heat

External or Ambient Heat

External heat comes from the surrounding environment or nearby equipment.    Typical examples include:

• Industrial ovens

• Heat-treatment furnaces

• Bakeries and food-processing lines

• Drying rooms

• Foundries and metal-processing areas

• Hot material-handling routes

Internal Heat Build-Up

Internal heat is generated as the polyurethane tread repeatedly compresses    and recovers during rolling.

The amount of internally generated heat generally increases with:

• Higher load

• Higher travel speed

• Longer continuous runtime

• Thicker tread sections

• Greater material deformation

• High rolling resistance

• Frequent acceleration and braking

Why Excessive Heat Damages Drive Wheels

Polyurethane properties change as temperature rises. Depending on the formulation    and operating conditions, excessive heat may lead to:

• Reduced tread hardness

• Greater deformation under load

• Higher rolling resistance

• Accelerated abrasion

• Cracks or tread chunking

• Permanent flat spots

• Reduced tread-to-core bond strength

Heat can create a cycle in which a softer tread deforms more, generates more heat    and then wears faster.

1. Load and Wheel Temperature

Higher load increases tread deformation in the floor contact area. If the wheel    is overloaded, temperature can continue rising during operation instead of    reaching a stable level.

Buyers should provide the maximum dynamic load per wheel rather than only the    total vehicle weight.

Dynamic load should account for:

• Acceleration

• Braking

• Cornering

• Ramp travel

• Uneven load distribution

• Floor joints and impact

2. Speed and Continuous Runtime

A wheel may perform safely at a particular load during short, low-speed operation    but overheat when the same load is carried continuously.

Confirm:

• Normal and maximum speed

• Operating hours per shift

• Longest continuous run

• Number of stops and reversals

• Cooling periods between cycles

AGVs and automated warehouse vehicles often require particular attention because    they may run for long periods with limited recovery time.

For automated applications, see our          AGV and warehouse wheel solutions    .

3. Polyurethane Formulation

Different polyurethane systems generate and tolerate heat differently.    Hardness alone does not show how a material will perform during continuous rolling.

Important material properties include:

• Rebound resilience

• Hysteresis

• Compression set

• High-temperature hardness retention

• Tear and fatigue resistance

• Bonding compatibility

Read how          polyurethane formulation affects drive wheel performance    .

4. Wheel Diameter

A smaller wheel rotates more times over the same travel distance and is often    more affected by floor joints and obstacles.

A larger wheel may reduce rolling effort and deformation frequency, but it also    changes vehicle speed, torque and installation space.

Wheel diameter should therefore be selected together with the motor, gearbox,    load and route.

5. Tread Thickness and Width

Tread dimensions affect load distribution, deformation and heat dissipation.

A thick tread provides more polyurethane material and may improve cushioning,    but it can also increase the amount of material undergoing repeated deformation.

A wider tread spreads the load over a larger area but may create additional    turning scrub on skid-steered vehicles.

The correct dimensions should be based on the complete application rather than    choosing the thickest or widest available tread.

6. Hardness

A softer tread usually deforms more under load, which can increase internal heat.    A harder tread normally deforms less but may provide less cushioning or traction.

A harder wheel is not automatically more heat resistant. The polyurethane system    and rebound properties remain important.

See our guide to          polyurethane drive wheel hardness    .

7. Floor Conditions

Rough floors, joints and debris create impact and additional tread deformation.    Wet or oily floors may cause slipping, which creates surface heat and abrasion.

Check whether the route includes:

• Rough or damaged concrete

• Expansion joints

• Ramps

• Sharp turns

• Oil or chemical contamination

• Metal chips or abrasive debris

8. Bearing and Alignment Problems

Not all wheel temperature comes from the polyurethane. Damaged bearings,    incorrect alignment or a loose mounting interface can create friction.

Check for:

• Bearing noise or play

• Unequal left and right wheel temperatures

• One-sided tread wear

• Loose bolts or keyways

• Bent shafts

• Incorrect wheel offset

Replacing the tread material will not solve temperature caused by a mechanical    installation problem.

When Are High-Temperature Wheels Required?

A dedicated high-temperature wheel should be evaluated when the wheel operates    close to ovens, furnaces, drying lines or other external heat sources.

Before selection, confirm:

• Normal ambient temperature

• Maximum exposure temperature

• Duration of each exposure

• Whether the temperature is continuous or intermittent

• Actual wheel temperature during operation

• Required load at the elevated temperature

View WSCS    high-temperature industrial wheels    for applications requiring dedicated heat-resistant wheel materials.

How to Measure Drive Wheel Temperature

For continuous-duty equipment, temperature should be measured after the wheel    has operated under its normal load and route.

A useful test should record:

• Starting temperature

• Load and speed

• Elapsed running time

• Tread surface temperature

• Metal core temperature

• Ambient temperature

• Time required to cool after stopping

Compare left and right wheels where possible. A significant difference may    indicate unequal loading, alignment or bearing problems.

Warning Signs of Heat-Related Damage

How to Reduce Drive Wheel Heat Build-Up

• Confirm the maximum dynamic load per wheel.

• Use a polyurethane formulation matched to the duty cycle.

• Increase wheel diameter where the drive design allows it.

• Review tread width and thickness.

• Reduce unnecessary wheel slip.

• Repair rough floor joints and remove debris.

• Check wheel alignment and bearings.

• Provide cooling periods where the process allows.

• Use a dedicated high-temperature wheel for external heat exposure.

Temperature Selection Support from WSCS

WSCS supplies standard and heat-resistant industrial wheels for forklifts,    AGVs, production lines and specialized equipment.

For a non-standard temperature range, load or mounting structure, our    custom industrial wheel service can review the material,    metal core, tread dimensions and operating cycle.

Send us the normal and maximum temperature, load, speed, continuous runtime,    wheel drawing and operating environment. Sample testing is recommended where    both external heat and high dynamic loading are present.

Frequently Asked Questions

Why does a polyurethane drive wheel become hot?

Heat may come from the environment or from repeated tread deformation under    load. Bearing friction, wheel slip and poor alignment can also contribute.

Are harder wheels more heat resistant?

Not automatically. Hardness affects deformation, but formulation, rebound,    load, speed and tread geometry also determine heat performance.

Can standard polyurethane wheels be used near ovens?

Only when the actual temperature and exposure time remain within the material    and wheel design limits. A dedicated high-temperature wheel may be required.

How can buyers compare heat-resistant wheels?

Compare the permissible load at the required temperature, continuous exposure    time, material type, wheel dimensions and available test data.