How to Understand the Specifications of Off-The-Road Tire (OTR Tire)?

OTR, also known as off-the-road tyres are specifically designed for construction sites, mines, agricultural fields, and many other places. OTR tyres can endure harsh conditions, heavy loads, and sometimes both. Understanding the specifications of tyres can be a bit overwhelming. How to Understand the Specifications of Off-The-Road Tire (OTR Tire) is a question asked by many while choosing the tyre. So, in this blog, our tyre experts at Sayan International will help to break down the essential specifications you should consider while choosing OTR tires.

1. Tire Size

The size of tyre is the first thing to focus on when choosing an OTR Tyre. More specifically, OTR tires are usually described by the numbers and letters referring to their size. For example, a tire may be rated as “23.5R25.” Here’s what that means:

• 23.5: This number refers to the tire’s width in inches when it is mounted and inflated.
• R: This letter indicates the tire’s construction type, with “R” standing for radial construction, which is common in modern tires for better performance and durability.
• 25: This number represents the diameter of the wheel in inches that the tire fits onto.

Knowing the right size is pivotal for making certain that the tire fits your vehicle and meets its performance requirements.

2. Load Index

The load index conveys that the load capacity of the tire is a certain weight. For example, an OTR tire with a load index of 160 means it can carry about 5000 pounds or so. When choosing the tires, the load index ought to be checked in order to arrive at a tire that will support the weight of the equipment and other loads. It is safer and wiser to always choose a tire with a further load rating than the one expected to convey.

3. Tread Pattern

The tread pattern of OTR tires is quite significant when it comes to traction and efficiency. Different tread designs are suited for various terrains:

• Aggressive Treads:  For muddy or loose surfaces like construction sites and off-road conditions.
• Smooth Treads: These are better for hard, flat surfaces, giving a more stable ride.
• Multi-Purpose Treads:  Offers a balance of both and can perform in various conditions.

When selecting tires, consider where you will be operating most often. The right tread pattern will enhance traction and improve safety.

4. Tire Construction

OTR tyres are classified in various structures, generally radial and bias ply.

• Radial Tires: These have a construction whereby the plies run perpendicular of travel. Besides, they have higher performance rates and fuel efficiency, and their durability cannot be questioned.
• Bias-Ply Tires: These have plies that run in different directions at an angle and give better sidewall but unfortunately give less stability and fuel efficiency than the radial tires. They can be applied in specific applications where durability rather than performance is valued.

Choosing the right construction type depends on your specific usage and operating conditions.

5. Speed Rating

Other specifications include the speed rating which shows the utmost speed that a particular tire is able to operate at. For example, a car whose tires have a speed rating of “L” can comfortably operate at 75 mph. In fact, in some cases, the OTR vehicles may move at comparatively lower speeds but having the speed rating can help determine whether the tire in question meets the operational demands of the vehicle without resulting in overheating or severely compromising on its performance.

In OTR tires, there is sidewall protection which is aimed at protecting the tire from impact in the rough surface. Certain tires have designed side walls that are stronger and offer protection against cuts and punctures. If your service will be under extreme conditions, make sure you settle for tires with strong sidewall reinforcement.