1. On Wondee Tractor 5th wheel and fifth wheel Since 1999
2. 20 years experience on semi trailer 5th wheel and fifth wheel
3. 1 year Quality warranty
4. ISO, TS16949 Certificate
5. 7x16 hours service
6. Customized OEM semi trailer 5th wheel and fifth wheel are available
7. 4 Global Offices
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.
WONDEE Forging type Fifth Wheel Dimension:
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 Casting type Fifth Wheel Dimension: 
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 |
WONDEE Trailer Truck Forging Fifth Wheel Manufacturers Information:
Supplying the Forging type and casting type Fifth wheel to international market more than 20 years.
1.Sizes: 2" , 3.5" , 50# , 90#
2. Material: Forging fifth wheel and casting fifth wheel
3. Max. Capacity: 20T,25T,28T,36T,40T.
4.MOQ: 50 Pieces
5. Lead time: About 10 - 15 working days
6. Payment terms: T/T or L/C at sight
7. Production ability: 2000 pieces per month
8. Quality level: excellent quality for international market, made in China, WONDEE brand
9. Certificate: ISO9001; TS16949; COC; PVOC; CIQ; SONCAP; BV; C/O; FORM
10 We also like to develop new types according to your special requirement
Packing of 5th wheel Information:
Besides Fifth wheel , WONDEE also Supply:
| Semi-trailers: | |||
| Skeletal semi-trailers | flatbed semi-trailers | container semi-trailers | low bed semi-trailers |
| van semi-trailers | fuel tank semi-trailers | logging semi-trailers | Fence Semi trailers |
| Spare Parts: | |||
| Leaf spring, | flat bar, | Chassis, | H-beam |
| Air suspension, | mechanic suspension, | bogie | Coupling, |
| Axle | air chamber, | slack adjuster | hitch. |
| Brake drum | brake shoe | brake lining | wheel hub |
| tubeless wheel rims, | tube wheel rims, | Aluminum wheel rim | wheel bolt |
| u bolt | center bolt | hub bolt | twist lock, |
| Turntable, | 5th wheel, | landing gear, | king pin, |
