| SIZE | STAR RATING |
TYPE | TRA CODE |
STANDARD RIM |
TREAD DEPTH | LOAD INDEX |
SECTION WIDTH | OVERALL DIAMETER | MAX LOAD AND INFLATION PRESSURE(kg/kpa) TRA | |
| (mm) | (mm) | (mm) | 50KM/H | 10KM/H | ||||||
| 17.5R25 | ★★★ | TL | L-5 | 14.00/1.5 | 64 | 193A2 | 445 | 1399 | / | 11500/750 |
| 20.5R25 | ★★ | TL | L-5 | 17.00/20 | 68 | 193A2 | 521 | 1548 | / | 11500/650 |
| 23.5R25 | ★★ | TL | L-5 | 19.5/2.5 | 78 | 201A2 | 597 | 1673 | 14500/600(GB) | / |
| 26.5R25 | ★★ | TL | L-5 | 22.0/3.0 | 88 | 209A2 | 673 | 1798 | / | 18500/650 |
| 29.5R25 | ★★ | TL | L-5 | 25.00/3.5 | 95 | 216A2 | 749 | 1921 | / | 22400/650 |
| 35/65R33 | ★★ | TL | L-5 | 28.00/3.5 | 95 | 223A2 | 890 | 2075 | / | 27250/650(ETRTO) |
Designed for large mine loaders, heavy-duty dump trucks, and other equipment operating in mining, excavation, and demanding construction environments
Qingdao Kebek Tire Co., Ltd. is specialized in all kinds of OTR tire manufacturing with 25 years of experience, offering safety solutions for vehicles and machinery. We offer a wide range of tires for heavy duty machinery, including earth mover OTR tires, mining rigid dump truck tires, agricultural tires, forklift tires, as well as tires for scissor lifts and boom lifts.
Our OTR tires are exported to 85 countries around the world with good feedback and a high reputation. We are proud to offer you our tire solutions: cost saving solution for truck and bus tires, long working lifespan solution with maintenance free performance for solid tires, and cutting and heat resistant solution for mining tires. We have tire solutions that meet different clients and markets demands, combining superior performance, durability, and safety for each of your trips and movements.
The abrasion resistance of OTR tires depends primarily on the tread compound formulation. Typically, we develop multiple compound options — often three or more specialized recipes — for the same tire model to match different working conditions.
To recommend the most suitable tread pattern and compound, it’s essential to understand your specific application: for example, whether the tires will be used in construction, mining (such as copper, iron, or granite mines), or other environments. This allows us to provide tires optimized for both performance and durability in your particular operation.
The load capacity of OTR tires is indicated by their load index and is often associated with a star rating under industry standards such as those set by the Tire and Rim Association (TRA).
For example, a 3300R51 tire with a 2-star rating has a load index of 235 under TRA code E4 with a 70mm tread depth. At a speed of 50 km/h, its maximum load capacity is 38,750 kg. When fitted in a set of four on a rigid dump truck, the total load capacity reaches approximately 155 tons at 50 km/h.
It is important to note that load capacity is speed-dependent: operating at speeds lower than 50 km/h may allow for a higher load, while speeds exceeding 50 km/h require a reduction in load to maintain safety and tire integrity.
The puncture resistance of our OTR tires is ensured through a cut-resistant compound, robust steel-belted construction, and deep tread design. These features provide excellent protection against sharp objects and abrasion in harsh environments. Customized solutions are available based on your specific working conditions. Contact us for a tailored recommendation!
For optimal performance, we recommend selecting tires based on your specific environment (e.g., rock type, surface conditions, and load/speed requirements). We offer tailored solutions with warranty support to ensure maximum uptime and cost-efficiency.
Let us know your application details for a personalized recommendation!
Yes, OTR tires require professional installation due to their size, weight, and technical complexity. Proper mounting and demounting ensure correct bead seating, inflation safety, and alignment with the rim—critical for preventing operational failures, air leaks, or accidents. Professional service also includes torque checks, pressure validation, and compatibility verification. We strongly recommend expert installation to maximize tire performance and safety.
Regular inspection and professional repair are essential. For wear, rotate tires periodically to ensure even tread usage. For minor punctures, trained technicians can perform internal patches or plugs following TRA guidelines. Severe damage may require tire replacement.
Always maintain proper inflation and avoid overloading. We provide detailed maintenance protocols and onsite support—contact us for assistance tailored to your operating conditions.
The TRA (Tire and Rim Association) codes such as G2, E3, E4, L4, L5, and L5S are international standards used to classify OTR tires based on their application and tread depth:
Letter Prefix: Indicates the primary equipment type
G = Grader
E = Earthmover
L = Loader
Number Suffix: Refers to tread depth — a higher number indicates a deeper tread
Example:
L3 has deeper tread than L2
E4 has deeper tread than E3
Combined Codes:
Codes like G2/L2 indicate suitability for both Graders and Loaders.
Similarly, E3/L4 tires are designed for Earthmovers and Loaders.
Special Designation:
L5S denotes a smooth-tread tire specifically designed for underground mining applications, offering enhanced stability and minimal surface disturbance.
For optimal performance and safety, always match the TRA code to your equipment and working conditions.
