Why is the right OTR rim so important?
An OTR rim is not a standard steel component. The rim supports the tyre, absorbs heavy forces and ensures that the wheel assembly remains stable under load. This is important for machines used in earthmoving, recycling, port logistics and heavy industry.
At Heuver, we therefore look beyond just the tyre. We consider the complete combination of tyre, rim, machine and application. Only then can we create a wheel solution that suits the work, the load and the conditions.
This article was written by Anne Bouwmeester
Anne Bouwmeester is Business Unit Manager OTR & Industrial Tyres at Heuver and is responsible for the OTR and industrial tyre activities. Together with the Heuver OTR team, he supports customers in sectors such as mining and earthmoving with practical and technically sound tyre solutions. Based on this combined expertise, the focus is always on maximising uptime and ensuring reliable performance in the toughest conditions.
What is an OTR rim?
An OTR tyre often gets the most attention. This makes sense, as the tyre provides grip, load-bearing capacity and traction. However, the rim largely determines how safely and reliably the entire wheel combination performs.
An OTR rim is not a standard steel component. The rim supports the tyre, absorbs heavy forces and ensures that the wheel assembly remains stable under load. This is important for machines used in earthmoving, recycling, port logistics and heavy industry.
At Heuver, we therefore look beyond just the tyre. We consider the complete combination of tyre, rim, machine and application. Only then can we create a wheel solution that suits the work, the load and the conditions.
What is an OTR rim?
An OTR rim is a rim for Off-The-Road applications. These rims are used on machines operating outside the normal road environment. Examples include mobile excavators, wheel loaders, dumpers, graders, reach stackers, telehandlers, telescopic cranes and port machinery.
These machines often operate under heavy loads. They travel over uneven, hard or contaminated surfaces, make sharp turning manoeuvres, are subjected to shocks and regularly operate for long periods at low speed with high torque.
That is why an OTR rim must do more than simply support a tyre. The rim must be resistant to deformation, impact, corrosion, high wheel loads and intensive daily use. This is particularly crucial for safety and operational reliability in earthmoving, recycling and transhipment.
Read also: OTR & EM tyres: how to choose the right earthmoving tyre.
Conclusion: an OTR rim forms the technical basis of the wheel assembly and must be suited to the machine, the load and the working environment.
What is the difference between one-piece and multi-piece OTR rims?
Within OTR applications, a distinction is mainly made between one-piece and multi-piece rims. The right choice depends on the machine, the tyre size, the load capacity and the application.
A one-piece OTR rim consists of a single welded construction. This type is often used on mobile excavators, telehandlers, compact wheel loaders and smaller earthmoving machines.
A one-piece rim is particularly suitable when:
- the machine is medium-duty or compact;
- quick assembly is important;
- the application does not require an extremely heavy multi-piece construction.
The construction is simple and robust. Fewer loose parts also means less risk of air loss and relatively quick assembly.
Multi-piece rims are often used on heavy machinery. These consist of several components, such as lock rings, side rings, rim rings and O-ring seals. Multi-piece rims make it possible to safely fit and remove large and heavy tyres.
This type of rim is used, amongst other things, on large wheel loaders, dumpers, reach stackers, straddle carriers and port machinery. A multi-piece construction may also be necessary for applications with pneumatic tyres or solid rubber tyres.
Would you like to know which tyres are suitable for which machines?
Then read: Which earthmoving tyre is suitable for which machine?
Conclusion: one-piece rims are suitable for lighter and medium-duty applications, whilst multi-piece rims are required for heavy tyres, high loads and specialist fitting.
Which technical specifications determine the correct rim choice?
An OTR rim is never selected in isolation from the tyre and the machine. The rim size, rim width, recommended rim, permitted rim, tyre pressure, load index, rolling circumference and loaded radius together determine whether the wheel combination can function safely.
The application also plays a role. A wheel loader in earthmoving requires different characteristics than a reach stacker at a container terminal or a machine in recycling.
The most important factors influencing the choice of rim are:
- machine weight and load per wheel position;
- surface, driving speed and duration of use;
- heat build-up, impact and risk of tyre damage.
Ground surface, driving speed, operating time, heat build-up and risk of impact determine how much the wheel combination must be able to withstand.
You can read more about tread pattern selection in: The necessary differences in earthmoving tyres.
When selecting tyres for technical applications, the tyre, rim, machine weight and application are therefore always assessed together. An incorrect choice of rim can lead to air loss, fitting problems, accelerated tyre wear or damage to the rim.
Conclusion: the correct choice of rim depends on technical dimensions, load and application. Tyre and rim must always be assessed as a single combination.
Why are rims particularly critical for reach stackers and port machinery?
Reach stackers and port machinery operate under extreme conditions. At terminals, machines often run for long periods and under heavy use. They lift, move and stack containers under high loads and frequently travel on hard terminal surfaces.
During steering, braking, lifting and manoeuvring, significant forces are exerted on both the tyre and the rim. An incorrect or damaged rim can lead to air loss, instability, tyre damage or unexpected downtime.
In port environments, downtime is immediately noticeable. A reachstacker that is out of service can disrupt scheduling at a terminal. That is why heavy-duty multi-piece rims are combined with specialist industrial tyres on these machines.
Examples of tyres for heavy-duty terminal applications include the Galaxy Port Max, Aeolus AIN47 and Nokian HTS. These tyres are designed for stability, heat resistance and long service life. The rim must be technically capable of supporting this performance.
Conclusion: for reach stackers and port machinery, the right rim is essential to ensure stability, safety and reliability under heavy loads.
When are solid rubber tyres a logical choice?
In recycling, scrap processing, port handling and industrial logistics, tyres are put through their paces. Sharp metal parts, debris, heavy loads and constant manoeuvring increase the risk of damage and downtime.
In such environments, a solid rubber tyre can be a practical solution. Solid rubber tyres are strong, puncture-resistant and designed for applications where maximum uptime is more important than driving comfort at high speeds.
Read also: Albourgh Tyres launches extensive range of solid rubber tyres.
A solid rubber tyre is not fitted in the same way as a standard pneumatic tyre. The tyre is pressed onto the rim using a heavy-duty hydraulic press. This requires specific tools for each rim size, sufficient pressing force and a great deal of experience.
The rim must also be suitable for this application. The fit, construction and technical condition of the rim help determine whether fitting can be carried out safely and correctly.
You can read more about this service in: Heuver is the leading full-service EM specialist
and Heuver can now also press-fit solid rubber earthmoving tyres
Conclusion: solid rubber tyres reduce the risk of punctures, but require the correct rim, specialist fitting and thorough inspection.
Why do OTR rims need to be inspected periodically?
OTR rims are subjected to heavy forces on a daily basis. Load, impact, corrosion and intensive use can cause cracks, deformation or wear. Not all damage is immediately visible.
A damaged rim can lead to air loss, imbalance, tyre damage or a safety risk. That is why periodic inspection is important, especially for machines that operate continuously or under heavy loads.
Depending on the application, inspection techniques such as the following can be used:
- Magnaflux for surface crack detection;
- ultrasonic testing to check material and wall thickness;
- X-ray inspection for internal damage that is difficult to see.
This allows cracks and material issues to be detected before they lead to downtime or a safety issue.
Conclusion: regular inspection makes damage to OTR rims visible in good time and prevents minor defects from escalating into downtime or safety risks.
When is rim refurbishment worthwhile?
OTR rims represent a high value. Damage or wear therefore does not automatically mean that a rim needs to be replaced. In many cases, refurbishment can be technically, economically and sustainably beneficial.
Rims used in earthmoving, recycling, industry and port logistics are exposed to impact, corrosion, salt, moisture and contamination. By professionally inspecting, blasting, refurbishing and recoating a rim, its service life can be significantly extended.
A good refurbishment always begins with an assessment of the technical condition. It can then be determined whether repair is advisable. For a suitable rim, a new coating protects against moisture, salt, chemical exposure and harsh industrial conditions.
Through Bevri Wheels, Heuver has specialist expertise in the field of rim reconditioning, inspection, engineering and the production of custom-made wheels. This enables us to support customers with complete wheel solutions for EM and OTR applications.
Read also: Heuver acquires Bevri in Zeewolde.
Conclusion: rim refurbishment can be a sustainable and cost-effective choice, provided the rim is technically suitable for safe reuse.
Heuver advice: always consider the tyre, rim and application together
An OTR rim is less visible than the tyre, but just as important for safety and operational reliability. The rim helps determine how stable the machine is when driving, how securely the tyre remains mounted, and how well the wheel combination withstands heavy loads.
That is why Heuver always provides advice based on the complete situation. We consider the machine, application, load, surface, tyre size, rim size, desired service life, and the choice between pneumatic tyres and solid rubber tyres.
With expertise in OTR tyres, industrial tyres, solid rubber solutions, rim inspection, refurbishment and bespoke solutions, Heuver supports customers with comprehensive wheel solutions. This ensures the machine remains operational and minimises the risk of unexpected downtime.
Conclusion: reliable operation starts with a wheel combination that is technically sound. The right rim is not a minor detail, but the foundation.
FAQ: frequently asked questions about OTR rims
What is an OTR rim?
An OTR rim is a rim for Off-The-Road machinery. These rims are used on machinery such as wheel loaders, dumpers, mobile excavators, graders, reach stackers and port machinery. They are designed for heavy loads, impact and intensive use outside the normal road environment.
What is the difference between a one-piece and a multi-piece OTR rim?
A one-piece OTR rim consists of a single welded construction and is often used on lighter and medium-duty machines. A multi-piece rim consists of several components and is mainly used on heavy-duty machines, large tyres and applications where safe mounting and dismounting are particularly important.
Why are multi-piece rims used on heavy machinery?
Multi-piece rims make it possible to safely fit and remove large and heavy tyres. This is important for machinery such as dump trucks, large wheel loaders, reach stackers and port machinery. These rims are suitable for high loads and specialist wheel solutions.
Can solid rubber tyres be fitted to any OTR rim?
No. Solid rubber tyres require a suitable rim, the correct fit and specialist fitting equipment. The tyre is pressed onto the rim using a heavy-duty hydraulic press. This requires knowledge, precision and specific tools for each inch size.
Why do OTR rims need to be inspected?
OTR rims are subjected to heavy loads. Cracks, deformation or corrosion can lead to air loss, tyre damage or safety risks. Regular inspection helps to identify damage in good time and prevent unexpected downtime.
Is rim refurbishment a good alternative to replacement?
In many cases, yes. Refurbishment can be technically, economically and sustainably beneficial, particularly for expensive OTR and industrial rims. The rim must first be professionally inspected to determine whether safe reuse is possible.
What does Bevri Wheels do within Heuver?
Bevri Wheels specialises in rim engineering, rim refurbishment, inspection, the production of custom-made wheels and complete wheel solutions for EM and OTR applications. In doing so, Bevri Wheels strengthens Heuver’s full-service approach.