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2/3.5 Inch 50/90# Casting Fifth Wheel for Heavy Duty Trucks, Tractors and Semi Trailers

20+ years of experiences (since 1999)
Implementing IATF 16949-2016
Implementing ISO 9001-2015
Quality testing by an independent laboratory
Warranty: 18 months since shipping date
Unique lock-jaw/bar design: Easy & Safe locking
Stamped plate with Fabricated frame: Robust & Reliable
Technical standards: GB/T 31879-2015, GB/T 4606, GB/T 4607
Sales volume (units): 50,000+ per year

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WONDEE fifth wheel applicantion

The fifth-wheel coupling provides the link between a semi-trailer and the towing truck, tractor unit, leading trailer or dolly. The coupling consists of a kingpin, a 2-or-3+1⁄2-inch-diameter (50.8 or 88.9 mm) vertical steel pin protruding from the bottom of the front of the semi-trailer, and a horseshoe-shaped coupling device called a fifth wheel on the rear of the towing vehicle. As the connected truck turns, the downward-facing surface of the semi-trailer (with the kingpin at the center) rotates against the upward-facing surface of the fixed fifth wheel, which does not rotate.

Some camper trailers also use a fifth-wheel configuration, with the coupling installed in the bed of a pickup truck as a towing vehicle; "fifth wheel" is therefore sometimes used as a synonym for such campers.


Automotive quality management systemImplementing IATF16949-2016
Quality management system (Services)Implementing ISO9001-2015
Technical standardsGB/T 31879-2015, GB/T 4606, GB/T 4607
Warranty18 months since shipping date
Raw materialQ345 Pressed steel or Cast Steel Construction top plate, Forged alloy steel swing lock
Top platePressed steel construction top plate with built-in, hardened front lock area
LockForged, Machined, Heat-Treated alloy steel lock jaw with simple lock adjustment for extended wear life
Operating handleEasy to pull operating handle fitted with secondary locking device
Mounting boltBrackets with ISO standard mounting bolt pattern and elongated mounting holes for easy field replacement
MaintenanceSimple locking mechanism with only 4 moving parts for easy maintenance, repair and replacement
Loading capacityNot less than European standards
GreaseHigh efficient special grease is used to ensure good lubrication effect in various   working environments and prolong the service life.
Sales volume (units)50,000+ per year
Overseas market30+   countries  (Thailand, Austraulia, Singapore, Russia, Brazil, Malaysia, The Philippines, Indonesia, Saudi Arabia, UAE, Iraq, South Africa, Nigeria, Tanzania, Cameroon, Gabon etc)
Clients (overseas)40+
Land area (square meters)25,000+
Number of equipments (sets)200+
Available certificatesFORM E, FORM A, COC, BV, SGS, SASO

Comprehensive info of fifth wheels:

Production seriesforging 2", forging 3.5“, casting 2", casting 3.5"
Suitable king pin2", 3.5" or 50, 90
Capacity 2" (50mm) king pin lock
20,000 kg Vertical Load
65,000 kg Gross Combination Weight
D-Value 152 kN U-Value 20 Tonne
Capacity 3.5" (90mm) king pin lock
30,000   kg Vertical Load
80,000 kg Gross Combination Weight
D-Value 200 kN U-Value 30 Tonne
Mounting (Slide bracket) height150 mm, 160 mm, 170 mm, 172 mm, 182 mm, 185 mm, 195 mm, 200 mm, 220 mm, 225 mm, 250 mm or 7”, 8”, 9”, 10” or 11”
Slide plate travel length8”, 12”, 16”, 24”, 36”, 48”
Swing typeSingle   swing type, double swing type
ApplicationTowing truck, tractor unit, leading trailer or dolly, light weight vehicles, camper trailers, multiple road condition
Interchangeable brandsJOST fifth wheels, SAF-HOLLAND fifth wheel, Fuwa fifth wheels, etc.
ReplacementsJSK 35 DV 25, JSK39 DV 30, JSK 39 DV 35, JSK52, JSK35DVS, JSK 36DV, JSK 39 DV 28, FW20-150, FW20-185, FW28-150, FW28-185, FW0070, FW78Q, FW78A, FW78B, FW78ZB, FW78ZKB, FW78S, FW79S, FW79H, FW79F, GC 6, SK-S 36.20 PLUS H, SK-S 36.20 PLUS, SK-S 36.20 PLUS W, SK-S 36.20 PLUS D, SK-S 36.20 PLUS DW, SK-S 36.20 PLUS V, SK-S 36.20 PLUS VW, FW 3510, FW 3110, GES 20, SK-S 36.20 PLUS, SK-HD 38.36, SK-HD 38.36G, FW0E70, FW2E70, FW0100, FW0165, FW3510-TR, FW0E70-T, FW3540 + FW3140, FW7E40
ColorsShiny black, dark black, grey, blue, red, etc. As per requirement.
Standards implementedIATF 16949, ISO9001-2015, GB/T 31879-2015, GB/T 4606, GB/T 4607
Payment termTT, LC, DP
Lead timeAbout 15~25 working days
MOQ10 pcs


5th wheel (12)

WONDEE casting type fifth wheel series:

Item No. Rated vertical   load D-value Lengthways angle Transverse swing angle Installation height King Pin Size Weight
(kg) (kn) (a°) (β°) (mm) (mm) (kg)
FW50-C01 25000 176 15 0 167.5 50 172
FW50-C3038C1 28000 170 15 0 195 50 229
FW90-C3038C1 36000 260 15 0 195 90 229
FW90-C3038G1 40000 260 15 7 290 90 300

5th wheel (10)

WONDEE forging type fifth wheel series:

Item No. Rated Vertical Load D-value Lengthways Swing Angle Installation Height King Pin Size Weight
(kg) (kn) (a°) (mm) (mm) (kg)
FW50-FS01 20000 152 12 150.5 50   ( 2" ) 126
FW50-FS02 20000 152 16 173 50   ( 2" ) 130
FW90-FS01 25000 182 12 165 90   ( 3.5" ) 140
FW90-FS02 25000 182 15 175 90   ( 3.5" ) 145


WONDEE 5th wheel WONDEE 5th wheel packingWONDEE 5th wheel packing2WONDEE 5th wheel container loading


Components & spare parts of WONDEE Autoparts fifth wheels:

5th wheel (2)

(Repair kits of fifth wheels)


In addition to supplying different types of semi trailer 5th wheel, WONDEE also Supply different types of semi trailer components as below:




Xinhe Industrial Park, Xiamen, Fujian, China 361006





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