Coupling unit & Coupling head
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.
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!
Overrun device for trailers AL-KO 251S 2700kg
Product available in very large quantity
£221.9922199 PTS
- Catalog number:
- GVW:
Coupling unit for trailers AL-KO 3500kg V 2,8VB1 AK351
Product available in very large quantity
£584.2958429 PTS
- Catalog number:
- GVW:
Ball coupling for trailers WW 8-Y Winterhoff
Product available in very large quantity
£12.791279 PTS
- Catalog number:
- GVW:
- Material:
- Nose load:
Stabiliser coupling AL-KO AKS 3004 - up to 3000 kg
Product available in small quantity
£403.8940389 PTS
Coupling head WW 150-VG 1500 kg 70x70 mm Winterhoff
Product available in very large quantity
£24.492449 PTS
- Model:
- Catalog number:
- GVW:
Coupling head Winterhoff WW 8-H 800 kg 70x70 mm
Product available in very large quantity
£12.591259 PTS
- Catalog number:
- GVW:
- Material:
Product unavailable, delivery soon
£64.996499 PTS
- Catalog number:
- For the coupling unit:
- Total permissible trailer weight:
Coupling head for trailers AL-KO AK7 750 kg 60 mm
Product available in very large quantity
£11.291129 PTS
- Catalog number:
- Diameter of mounting holes:
- GVW:
Coupling unit for trailers - KNOTT KF27 2700kg
Product available in very large quantity
£230.0923009 PTS
- Catalog number:
- GVW:
Our bestseller
Coupling head for trailers Winterhoff WW 8-E GVW 800 kg
Product unavailable, delivery soon
£10.091009 PTS
- Catalog number:
- GVW:
- Material:
Trailer coupling hitch 750 C for pipes with a 50 mm diameter
Product available in very large quantity
£16.291629 PTS
Bellow for overrun device AL-KO 161S/251S/251G FI50
Product available in very large quantity
£6.89689 PTS
- Reference:
Coupling head for trailers Knott KQ14A 50 mm 1400 kg
Product available in very large quantity
£23.092309 PTS
- Catalog number:
- Diameter of mounting holes:
- GVW:
Coupling head for trailers Knott K 7,5-D 60 mm 750 kg
Product available in very large quantity
£17.491749 PTS
- Catalog number:
- Diameter of mounting holes:
- GVW:
Coupling head for trailers Winterhoff WW 8 - GVW 800 kg
Product available in very large quantity
£9.69969 PTS
- Catalog number:
- GVW:
- Material:
Coupling head for trailers Steelpress ZSK 750 H
Product available in very large quantity
£14.991499 PTS
Coupling unit KNOTT KF20A 1100-2000 kg.
Product available in very large quantity
£261.7926179 PTS
- Catalog number:
- GVW:
Safety rubber bellow AL-KO 30S/60S/90S FI35
Product available in very large quantity
£5.69569 PTS
- Reference:
Coupling head Winterhoff WW 8-D40 800 kg 40x40 mm
Product unavailable, delivery soon
£11.691169 PTS
- Catalog number:
- GVW:
Overrun coupling damper KNOTT KF27A 1600-2700 kg
Product available in very large quantity
£73.097309 PTS
- Catalog number:
- For the coupling unit:
- Total permissible trailer weight:
AL-KO coupling unit for trailers 1600kg V 161S AK161
Product available in very large quantity
£233.8923389 PTS
- Catalog number:
- GVW:
Coupling for trailers AL-KO 3000kg V 251G AK301
Product available in very large quantity
£289.8928989 PTS
- Catalog number:
- GVW:
Support bracket for overrun device AL-KO 150 mm
Product available in very large quantity
£6.69669 PTS
- Reference:
- Material:
- Frame height needed:
Coupling head Winterhoff WW 8-C 800 kg
Product available in very large quantity
£12.991299 PTS
- Catalog number:
- Material:
- GVW:
Coupling unit for trailers - KNOTT KF13 1400kg
Product available in very large quantity
£226.3922639 PTS
- Catalog number:
- GVW:
Ball hitch for trailer Knott K14A fi 50 mm N-3
Product available in very large quantity
£25.592559 PTS
- Model:
- Catalog number:
- Diameter of mounting holes:
- GVW:
Shock absorber for overrun device AL-KO 251S 2700 kg - new model
Product available in very large quantity
£51.795179 PTS
- Catalog number:
- For the coupling unit:
- GVW:
Overrun device AL-KO 60S/2 750kg
Product available in very large quantity
£188.9918899 PTS
- Catalog number:
- GVW:
Coupling unit for trailers - KNOTT KF17 1700kg
Product available in very large quantity
£241.2924129 PTS
- Catalog number:
- GVW:
Universal KNOTT overrun device cover
Product available in very large quantity
£18.691869 PTS
- Catalog number:
Cover for trailer overrun device
Product available in very large quantity
£11.091109 PTS
- Catalog number:
Overrun device bellow AL-KO 2.8VB FI60
Product available in very large quantity
£17.291729 PTS
- Reference:
Coupling head Winterhoff WW 150-RB 1500 kg
Product available in very large quantity
£32.093209 PTS
- Catalog number:
- Material:
- GVW:
Coupling unit for trailers AL-KO 251S 2700kg + AKS3004
Product available in very large quantity
£422.5942259 PTS
- Catalog number:
- GVW:
Coupling unit for trailers AL-KO 1600kg KW100 161S AK160
Product available in very large quantity
£297.3929739 PTS
- Catalog number:
- GVW:
- Coupling type:
Coupling head for trailers Steelpress ZSK 750 J 70x70 mm
Product available in very large quantity
£16.891689 PTS
- Model:
- Material:
- Reference:
- Type of drawbar:
- Drawbar width:
KNOTT overrun device for 2700kg trailer, overrun brake KF27B K27A
Product available in very large quantity
£276.7927679 PTS
- Catalog number:
- GVW:
Coupling head AL-KO AK351 3500kg for 251S
Product available in very large quantity
£123.3912339 PTS
- Catalog number:
- Type of drawbar:
- GVW:
Friction pads AL-KO AKS3004
Product available in very large quantity
£34.093409 PTS
- Reference:
- Intended for::
Hitch damper for KNOTT KFG30 2700-3500 kg
Product available in very large quantity
£70.497049 PTS
- Catalog number:
- For the coupling unit:
- Total permissible trailer weight:
Trailer bellow - rubber protection for KNOTT overrun device KFG35
Product available in very large quantity
£13.291329 PTS
Coupling unit for trailers KNOTT KFG35D 3500kg
Product available in very large quantity
£617.9961799 PTS
- Catalog number:
- GVW:
Front and rear friction pads AL-KO AKS 3004/3504
Product available in very large quantity
£27.392739 PTS
Tie rod for overrun device model KF13, KF17, KF20 by KNOTT
Product available in very large quantity
£42.794279 PTS
- Reference:
AL-KO 251S device/overrun brake shock absorber (new type) for a 2700kg trailer
Product available in very large quantity
£87.998799 PTS
- For the coupling unit:
- GVW:
AL-KO overrun brake damper 2.8 VB/1 PROFI 3500 kg
Product available in very large quantity
£168.2916829 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
£73.097309 PTS
- Catalog number:
- For the coupling unit:
- Total permissible trailer weight:
Coupling head Winterhoff WW 150-VF 1500 kg 60x60 mm
Product available in very large quantity
£30.393039 PTS
- Catalog number:
- GVW:
- Material:
- For drawbar type::
Zaczep kulowy Winterhoff WW 8-B 800 kg 60 mm
Product unavailable, delivery soon
£12.191219 PTS
- Catalog number:
- Material:
- GVW:
KNOTT trailer tow ball coupling KS30 3000 kg fi 35/40/45/50 mm
Product available in very large quantity
£291.6929169 PTS
- Model:
- GVW:
- Nose load:
- Reference:
Support wheel holder console AL-KO 161S, 251S, 251G
Product available in very large quantity
£39.393939 PTS
- Reference:
Trailer overrun damper KNOTT KF13 750-1300 kg
Product available in very large quantity
£56.095609 PTS
- Catalog number:
- For the coupling unit:
- Total permissible trailer weight:
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