1. What It Is

Road-rail vehicle wheels are designed for maintenance and inspection vehicles that can operate on both road surfaces and railway tracks.
These forged wheels are used in specialized rail service equipment where compact size, stable guidance, and reliable wear performance are required.
They are suitable for inspection vehicles, maintenance units, and rail access equipment.

2. Where It Is Used

This type of railway wheel is widely used in:

• Railway maintenance vehicles
• Rail inspection equipment
• Road-rail utility vehicles
• Track access service vehicles
• Rail infrastructure support systems

3. Why Choose It

ER7 / 4140 Material

These materials provide good strength and durability for service vehicles operating in maintenance environments.

Compact Diameter Range (400–800 mm)

This range is suitable for smaller road-rail platforms that require controlled dimensions and stable running.

Controlled Hardness (260–320 HB)

This hardness range helps improve wear resistance while maintaining toughness for service use.

Accurate Bore and Profile Design

Dimensional precision improves compatibility with maintenance vehicle assemblies and supports stable wheel-to-rail contact.

Forged Production

Forging improves consistency and internal quality, which is important for service vehicles used in frequent field operations.

4. Data Support

Key performance parameters:

• Wheel Diameter: 400–800 mm
• Flange Height: 24–32 mm
• Flange Thickness: 25–30 mm
• Rim Thickness: 50–65 mm
• Bore Diameter: 80–180 mm
• Hardness: 260–320 HB

These parameters directly affect:

• Vehicle fitment → influenced by diameter and bore size
• Guidance stability → influenced by flange design
• Wear resistance → influenced by hardness and material
• Service reliability → influenced by forging quality
• Maintenance frequency → influenced by dimensional accuracy and heat treatment

5. Technical Specifications

6. Selection Guide

By Application

• Rail inspection vehicle → ER7
• Maintenance service vehicle → ER7
• Higher-duty road-rail equipment → 4140

By Load Capacity

• Light service load → ER7
• Medium service load → ER7
• Higher impact maintenance equipment → 4140

By Wheel Diameter

• 400–550 mm → compact inspection vehicles
• 550–700 mm → standard maintenance systems
• 700–800 mm → larger service vehicles

7. What Problem It Solves

These railway wheels help solve:

• Rapid wear in maintenance fleets
• Unstable rail guidance in compact vehicles
• Compatibility issues in special service equipment
• Frequent replacement caused by poor wheel quality

They improve operational reliability, reduce service downtime, and support safer maintenance vehicle performance.

8. FAQ

Q1: What material is suitable for road-rail vehicle wheels?
ER7 is suitable for standard service vehicles, while 4140 can be used for higher-duty applications.

Q2: Why are smaller wheel diameters common in road-rail vehicles?
These vehicles are compact and require wheel sizes matched to lighter maintenance platforms.

Q3: Can road-rail vehicle wheels be customized?
Yes, custom dimensions and profiles can be produced based on drawings and vehicle requirements.