Coupling heads and Overrun devices
Coupling heads and coupling units, sometimes also called overrun devices are all vital accessories when it commes to attaching the trailer onto your vehicle in a safe manner. At our online store, you will find plenty of coupling heads and coupling units, which have been produced by renowned manufacturers such as AL-KO, KNOTT, WINTERHOFF and STEELPRESS. The accessories in question boast a GVW values ranging between 700 and 3500 and are available at very affordable prices. If you want to travel risk-free with your trailer, simply get your hands on a coupling unit today and save yourself from all the hassle.
Our bestseller
Coupling head for trailers Winterhoff WW 8-E GVW 800 kg
Product available in very large quantity
12,99 €5557 PTS
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- GVW:
- Material:
AL-KO DIN drawbar eye DIN 2,8VB 351VB ⌀ 60
Product available in very large quantity
195,99 €83843 PTS
- Catalog number:
- Pipe diameter:
- Eyelet diameter:
Coupling head for trailers Winterhoff WW 8 - GVW 800 kg
Product available in very large quantity
12,99 €5557 PTS
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- GVW:
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Ball coupling for trailers WW 8-Y Winterhoff
Product available in very large quantity
15,99 €6840 PTS
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- Nose load:
Coupling head for trailers AL-KO AK7 750 kg 60 mm
Product available in very large quantity
13,99 €5985 PTS
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- Diameter of mounting holes:
- GVW:
Coupling head for trailers Winterhoff WW 8 - A DMC 800 kg
Product available in very large quantity
12,99 €5557 PTS
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- GVW:
- Material:
Bellow for overrun device AL-KO 161S/251S/251G FI50
Product available in very large quantity
8,99 €3846 PTS
- Reference:
Overrun device for trailers AL-KO 251S 2700kg
Product available in very large quantity
264,99 €113360 PTS
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- GVW:
Coupling unit for trailers AL-KO 1000 kg V 90S/3 AK 161
Product available in very large quantity
234,99 €100526 PTS
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Coupling head for trailers Knott KQ14A 50 mm 1400 kg
Product available in very large quantity
28,99 €12402 PTS
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- Diameter of mounting holes:
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Coupling head Winterhoff WW 8-D40 800 kg 40x40 mm
Product available in very large quantity
14,49 €6199 PTS
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- GVW:
Coupling unit for trailers AL-KO 251S 2700kg + AKS3004
Product available in very large quantity
520,99 €222874 PTS
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- GVW:
AL-KO coupling unit for trailers 1600kg V 161S AK161
Product available in very large quantity
255,99 €109510 PTS
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- GVW:
AL-KO overrun device for trailer 3000kg overrun brake 251G AK301
Product available in very large quantity
341,99 €146300 PTS
- GVW:
Coupling head for trailers Steelpress ZSK 750 H
Product available in very large quantity
18,99 €8124 PTS
Coupling unit for trailers - KNOTT KF27 2700kg
Product available in very large quantity
287,99 €123199 PTS
- Catalog number:
- GVW:
Coupling head for trailers Knott K 7,5-D 60 mm 750 kg
Product available in very large quantity
21,99 €9407 PTS
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- Diameter of mounting holes:
- GVW:
KNOTT K27A M14 ball hitch for a 50mm round drawbar for a 2700kg trailer, cast iron
Product available in very large quantity
59,99 €25663 PTS
Coupling head Winterhoff WW 8-C 800 kg
Product available in very large quantity
15,99 €6840 PTS
- Catalog number:
- Material:
- GVW:
Zaczep kulowy Winterhoff WW 8-B 800 kg 60 mm
Product available in very large quantity
14,99 €6413 PTS
- Catalog number:
- Material:
- GVW:
Coupling head Winterhoff WW 8-H 800 kg 70x70 mm
Product available in very large quantity
15,49 €6626 PTS
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- GVW:
- Material:
Safety rubber bellow AL-KO 30S/60S/90S FI35
Product available in very large quantity
7,49 €3204 PTS
- Reference:
Cast-iron ball coupling AK301 3000kg fi 50 mm
Product available in very large quantity
77,99 €33363 PTS
Rubber bellows - KNOTT KF7,5-KF30 protective rubber
Product available in very large quantity
9,49 €4060 PTS
Rubber bellows - KNOTT KF27-KF35 safety rubber
Product available in very large quantity
9,49 €4060 PTS
Shock absorber for overrun device AL-KO 251S 2700 kg - new model
Product available in very large quantity
63,99 €27374 PTS
- Catalog number:
- For the coupling unit:
- GVW:
Ball hitch for trailer Knott K14A fi 50 mm N-3
Product available in very large quantity
29,99 €12829 PTS
- Model:
- Catalog number:
- Diameter of mounting holes:
- GVW:
Front and rear friction pads AL-KO AKS 3004/3504
Product available in very large quantity
33,99 €14541 PTS
AL-KO overrun device for 1600 kg trailer, overrun brake 161S AK161
Product available in very large quantity
361,99 €154856 PTS
- Catalog number:
- GVW:
- Coupling type:
Coupling unit for trailers AL-KO 2600kg KW100 251S AK270
Product available in very large quantity
374,99 €160417 PTS
- Catalog number:
- GVW:
Coupling unit for trailers AL-KO 3500kg KW120 2,8VB1 AK351
Product available in very large quantity
822,99 €352067 PTS
- Catalog number:
- GVW:
Coupling unit for trailers AL-KO 3500kg V 2,8VB1 AK351
Product available in very large quantity
654,99 €280198 PTS
- Catalog number:
- GVW:
Coupling head AL-KO AK351 3500kg for 251S
Product available in very large quantity
150,99 €64592 PTS
- Catalog number:
- Type of drawbar:
- GVW:
Coupling unit for trailers - KNOTT KF13 1400kg
Product available in very large quantity
257,99 €110366 PTS
- Catalog number:
- GVW:
Coupling unit KNOTT KF20A 1100-2000 kg.
Product available in very large quantity
297,99 €127477 PTS
- Catalog number:
- GVW:
Coupling unit for trailers - KNOTT KF17 1700kg
Product available in very large quantity
276,99 €118494 PTS
- Catalog number:
- GVW:
KNOTT KFG30 3000 kg coupling unit for trailers
Product available in very large quantity
543,99 €232713 PTS
- Catalog number:
- GVW:
Coupling unit for trailers KNOTT KFG35D 3500kg
Product available in very large quantity
702,99 €300732 PTS
- Catalog number:
- GVW:
Shock absorber for trailers AL-KO 101VB/90S
Product available in very large quantity
82,99 €35502 PTS
- Catalog number:
- For the coupling unit:
Overrun device AL-KO 60S/2 750kg
Product available in very large quantity
229,99 €98387 PTS
- Catalog number:
- GVW:
Coupling unit for trailer AL-KO 1600kg KW100 161S AK160
Product available in very large quantity
379,99 €162556 PTS
- Catalog number:
- GVW:
Coupling head Winterhoff WW 13-N 1500 kg
Product available in very large quantity
38,99 €16680 PTS
- Catalog number:
- Material:
- GVW:
Coupling head Winterhoff WW 150-RB 1500 kg
Product available in small quantity
39,99 €17107 PTS
- Catalog number:
- Material:
- GVW:
Coupling head WW 150-VG 1500 kg 70x70 mm Winterhoff
Product available in very large quantity
29,99 €12829 PTS
- Model:
- Catalog number:
- GVW:
Coupling head Winterhoff WW 150-VF 1500 kg 60x60 mm
Product available in very large quantity
37,99 €16252 PTS
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- GVW:
- Material:
- For drawbar type::
Overrun device bellow AL-KO 2.8VB FI60
Product available in very large quantity
21,99 €9407 PTS
- Reference:
Support bracket for overrun device AL-KO 150 mm
Product available in very large quantity
8,99 €3846 PTS
- Reference:
- Material:
- Frame height needed:
Stabiliser coupling AL-KO AKS 3004 - up to 3000 kg
Product available in very large quantity
508,99 €217741 PTS
AL-KO coupling ball AK 161 1600 kg with Soft Dock
Product available in very large quantity
61,99 €26519 PTS
- Material:
- GVW:
- Nose load:
- Pipe diameter:
KNOTT overrun device for 2700kg trailer, overrun brake KF27B K27A
Product available in very large quantity
336,99 €144161 PTS
- Catalog number:
- GVW:
Trailer bellow - rubber protection for KNOTT overrun device KFG35
Product available in very large quantity
16,49 €7054 PTS
Coupling head for trailers Steelpress ZSK 750 J 70x70 mm
Product available in very large quantity
20,99 €8979 PTS
- Model:
- Material:
- Reference:
- Type of drawbar:
- Drawbar width:
Trailer coupling hitch 750 C for pipes with a 50 mm diameter
Product available in very large quantity
20,99 €8979 PTS
Overrun shock absorber 251S 2600 kg - old model
Product available in very large quantity
107,99 €46197 PTS
- Catalog number:
- For the coupling unit:
- GVW:
Product available in very large quantity
125,99 €53897 PTS
- Catalog number:
- For the coupling unit:
- Total permissible trailer weight:
Trailer overrun damper 161S 1600 kg - new model
Product available in very large quantity
89,99 €38497 PTS
- Catalog number:
- For the coupling unit:
- Total permissible trailer weight:
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Coupling heads
Coupling heads are used to attach the trailer onto a vehicle. There are many different types of coupling heads - coupling heads for V-shaped drawbars, coupling heads for T-shaped drawbars, coupling heads for pipe-shaped drawbars etc. The main point of difference between them however, is their maximum permissible GVW value, maximum load capacity of the coupling hook and last but not least, their spacing between mounting holes, which can all vary from model to model. In the case of coupling heads available in our online store, all the information that you need for individual coupling models can be found on the product's page.Coupling heads are equipped with a wear indicator, which helps to assess when the accessory in questions needs replacing. Another helpful source of information about the coupling head is the coupling correctness indicator, with the aid of which trailer users assess whether or not the trailer has been correctly connected onto a vehicle.
Trailer coupling units
Trailer coupling units also known as overrun devices are trailer accessories which are made up of not only a braking system but also of a coupling head and a steel casing, which connects the device together. It is possible to replace individual coupling unit parts rather than then whole set. It is also possible to equip the unit with shock absorbers.Coupling units for heavy-duty braked trailers with a GVW of 750kg or more are mounted onto drawbars of regular car trailers and tow trucks. There is no need to assemble a coupling unit onto a light-duty trailer, as it is required neither by law nor by sheer laws of physics, which would otherwise demand for a heavy-duty trailer to be equipped with such an accessory. Using a coupling unit will therefore increase safety levels when your trailer is in drive mode and will thus significantly decrease the force exerted on your car's brake system.
Car trailer coupling heads and coupling units
The more a car trailer coupling unit is used, the more likely it is that it is going to fall victim of natural wear and tear. Before you head off on a long trip, it is worth checking the wear indicator of the coupling unit and the coupling head.Coupling units are the only trailer element apart from the brake cord which connect the trailer with the towing vehicle. Assemblying the trailer coupling unit correctly is the first step which needs to be taken in order to reassure oneself of a safe drive. Here, at Unitrailer, we care about high quality products. It is for this reason that we sell only AL-KO, KNOTT, WINTERHOFF and STEELPRESS coupling units, as they offer the highest possible quality on the market. Choose the right coupling unit today and take care of your brake system the right way!