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RINGFEDER Coupling Solution

Solving 3 Core Issues for China’s Car Carrier Fleets

Problems faced by the industry:

  • Low freight rates → compliant vehicles struggle to survive
  • Low transport capacity → logistics companies face operational difficulties
  • Oversized vehicles → major safety hazards and high violation risks

Relevant Chinese Regulations

JT/T1178.2-2019

<Safety specification for Commercial vehicle for cargos transportaion – Part 2: Towing vehicle and trailer>

Clause 7.2.1 states: The pin coupling is the only permitted solution.
The pin couping and drawbar eye must be 50mm.

GB1589-2016

<Limits of dimensions, axle load and masser for motor vehicle, trailers and combination vehicles>

Clause 4.1.1.2 states:For center-axle car carriers, the maximum total length is 22 meters, enabling the highest legal load capacity.
* Violations of regulatory types:
* GB (mandatory standards) → affect vehicle registration and roadworthiness
* GB/T (recommended standards) → may block certification or market entry
* JT/T (industry recommended standards, it issued by the Ministry of Transport of P.R.China) → may affect business licensing or lead to fines/confiscation

Center-Axle Car Carrier

Total length of 22 meters – the maximum legal loading capacity in current Chinese regulations


  • Connects a car carrier speical towing vehicle unit with a center-axle car carrier trailer, increasing per-trip volume
  • Optimizes manpower – fewer drivers needed
  • Maximizes towing capacity, reducing fuel use and emissions

Compliant & Reliable Coupling

A key component for center-axle car carriers

RINGFEDER RF50
Perfect for China passenger car transport industry


Globally validated solution

Complies with EU UN/ECE R55 and regulations in China

Specially designed for trailer towing

Easy to install and operate, reducing maintenance costs Click to view the working principle of the towing hook


Click to view the Ringfeder towing hook

Industry current situation vs. RINGFEDER RF50: A Comparison

Criteria Criteria Typical Industry current situation RINGFEDER Coupling
Safety Safety Outsourced critical parts, inconsistent safety In-house production of key components, reliable safety
Reliability Reliability Uses single torsion spring → less reliable Uses two cylindrical compression springs → stronger closure, more reliable
Overall Cost Separated components, poor internal protection, high failure rate and part costs Integrated design, easier to maintain, lower parts cost
Technical Maturity just so so Established in 1922, over 100 years of towing system expertise
Service Scope Basic product selection, slow and low support Full lifecycle support: vehicle design, customization, maintenance, parts

China Application Case

Logistics Company: Wuhu Ruiyuan Logistics
Total Units: 142

body bulider:
  • Jiangsu Haipeng Special Vehicles Co., Ltd – 132 units
  • CIMC Tonghua Special Vehicles – 10 units
Benefits:
  • Zero risk of violation fines
  • Improved load capacity and transport safety