High-Strength Rolling Base For Underground Loader — 20-7.50

Product Highlight: 20-7.50 Underground Rim

Engineered specifically for the rigorous demands of subterranean mining, this 20-7.50 steel rim serves as the critical rolling component for underground LHD loaders and scooptrams. Unlike standard surface rims, this unit is built to handle the unique combination of low clearance and high impact found in drifts. It is precision-matched to mount 10.00-20 bias tires, ensuring the bead locks securely even under heavy lateral stress during mucking cycles. The robust three-piece flat-base design allows for easier tire changes in confined maintenance bays while maintaining the structural integrity needed for 60+ kg load-bearing operations.

Each unit is formed from Q355B structural steel and reviewed through multiple checkpoints:
 Three-piece assembly check to confirm rim integrity and safe tire fitting
 Key dimension inspection covering PCD, center bore, bead seat, offset and bolt holes
 Shot-blasted surface with anti-corrosion primer as standard; custom RAL colors available
 Batch records kept, with inspection reports provided when required
Our Tangyin, Anyang plant follows ISO 9001 and IATF 16949 systems, supporting OTR rim projects with engineering confirmation, custom development and stable batch supply.

 

This size is commonly applied in underground mining and heavy off-road operations:
 Underground LHD Loaders: Ore loading and haulage in drifts and stopes
 Mining Scooptrams: Mucking, transfer and short-distance underground hauling
 Underground Haulage Vehicles: Ore and waste transport in narrow tunnels
 Heavy Off-Road Mining Machines: Loaders and industrial vehicles needing serviceable three-piece rims
Since center bore, PCD and offset must match the vehicle hub, please verify fitment with your drawing, photos or existing wheel before ordering.

We can adapt the rim to your hub and tire setup:
 Adjust PCD, offset, center bore and bolt hole size
 Modify flange height, valve hole position and bead seat profile
 Increase steel grade or wall thickness for heavier loads
 Add custom paint, stenciling or brand marking
 Supply complete wheel assemblies when needed
All non-standard requests are reviewed by engineering before production. If new tooling is required, we will confirm it at the quotation stage.

Samples and trial quantities are available. Please send your rim size, PCD, offset, center bore, bolt hole data, application vehicle and target tire information. We will prepare a drawing or data sheet for approval before manufacturing.

Q: Can you manufacture rims based on our specific drawings or samples?
A: Yes, customization is our core strength. We can produce rims according to your technical drawings, physical samples, or specific vehicle parameters. Our engineering team will verify the dimensions and provide a confirmation drawing before production starts to ensure a perfect fit.
Q: What is the typical lead time for an order?
A: For standard specifications, we often have stock or short production cycles. For custom orders, the production lead time is typically around 22 working days after receiving the advance payment and final drawing confirmation. We always strive to meet your project deadlines.
Q: Do you accept third-party quality inspections?
A: Absolutely. We welcome inspections from third-party agencies like SGS, BV, or TÜV, as well as your own nominated inspectors. We have a closed-loop quality control system from raw materials to finished goods and are confident in our product reliability.
Q: How do you package the rims to ensure safety during shipping?
A: Safety is a priority. Each rim is secured on a steel pallet with separators and protective wrapping to prevent damage to the flange and lock ring groove. Pallets are strapped and film-wrapped for container loading, ensuring they arrive in perfect condition.
Q: What is your Minimum Order Quantity (MOQ)?
A: We are flexible to support your business. For custom orders, our MOQ starts from just 1 piece. For standard products, we also offer tiered pricing based on volume, so please contact us for a tailored quotation.
Q: Which international markets do you currently export to?
A: Our products are exported globally, including Southeast Asia (Indonesia), South America, the Middle East, Africa, Central Asia, and Russia. We are experienced in meeting the access requirements and certification standards of major global markets.
Q: What payment terms do you accept?
A: For custom orders, we typically require a 100% T/T advance payment. For regular or standard products, we accept a 70% T/T deposit with the 30% balance paid before shipment. We aim to provide secure and convenient transaction options.
Q: Do you provide documentation for customs clearance?
A: Yes, we provide a full set of export documents including the packing list, commercial invoice, and loading photos. We can also assist with HS code declarations and supply specific certification documents required by your country's customs.