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.
On special offer
551,99 €496,79 €212085 PTSThe lowest price of the product in the 30 days before the sale: 551,99 €
AL-KO AKS3004 ball hitch with stabilizer for 3000kg trailer with 50mm tubular drawbar
Product available in very large quantity
On special offer
135,99 €122,39 €52250 PTSThe lowest price of the product in the 30 days before the sale: 135,99 €
Shock absorber for overrun device/brake AL-KO 161S (old type) for 1600kg trailer
Product available in very large quantity
- For the coupling unit:
On special offer
44,99 €40,49 €17286 PTSThe lowest price of the product in the 30 days before the sale: 44,99 €
Friction pads AL-KO AKS3004
Product available in very large quantity
- Intended for::
On special offer
214,99 €193,49 €82603 PTSThe lowest price of the product in the 30 days before the sale: 214,99 €
Overrun brake damper 351VB 3500 kg
Product available in very large quantity
- For the coupling unit:
WINTERHOFF WW8-G ball hitch for 800kg trailer with 60mm square drawbar
Product available in very large quantity
14,39 €6143 PTS
WINTERHOFF WW8-Y ball hitch for 800kg trailer with V-type drawbar
Product available in very large quantity
16,99 €7253 PTS
Our bestseller
WINTERHOFF WW8-E ball hitch for 800kg trailer with 50mm square drawbar
Product available in very large quantity
13,99 €5972 PTS
WINTERHOFF WW8-A ball hitch for 800kg trailer with 50mm tubular drawbar
Product available in very large quantity
15,39 €6570 PTS
WINTERHOFF WW8-D40 ball hitch for 800kg trailer with 40mm square drawbar
Product available in very large quantity
15,49 €6613 PTS
AL-KO 251S overrun device with AK270 hitch for 2700 kg trailer with V-type drawbar
Product available in very large quantity
302,79 €129264 PTS
- Drawbar profile:
- GVW:
- Nose load:
AL-KO AK7 ball hitch for 750kg trailer with 60mm square drawbar
Product available in very large quantity
16,69 €7125 PTS
STEELPRESS ZSK-0750H ball hitch for 750kg trailer with 50mm square drawbar
Product available in very large quantity
15,49 €6613 PTS
KNOTT KQ14-A ball hitch for 1400kg trailer with 50mm square drawbar
Product available in very large quantity
30,99 €13230 PTS
Bellow for overrun device AL-KO 161S/251S/251G FI50
Product available in very large quantity
9,49 €4051 PTS
AL-KO 90S/3 overrun device with AK161 hitch for 1000 kg trailer with V-type drawbar
Product available in very large quantity
257,29 €109840 PTS
- Drawbar profile:
- GVW:
- Nose load:
AL-KO 251G overrun device with AK301 hitch for 3000 kg trailer with V-type drawbar
Product available in small quantity
403,69 €172339 PTS
- Drawbar profile:
- GVW:
- Nose load:
KNOTT KF27B overrun device with K27A hitch for 2700 kg trailer with V-type drawbar
Product available in very large quantity
327,99 €140022 PTS
- Drawbar profile:
- GVW:
- Nose load:
KNOTT K7.5-L ball hitch for 750kg trailer with 60mm square drawbar
Product available in very large quantity
25,69 €10967 PTS
KNOTT K27-A ball hitch for a 2700kg trailer with a 50mm pipe drawbar, cast iron
Product available in very large quantity
64,99 €27745 PTS
WINTERHOFF WW8-C ball hitch for 800kg trailer with 70mm tubular drawbar
Product available in very large quantity
17,49 €7467 PTS
WINTERHOFF WW8-B ball hitch for 800kg trailer with 60mm tubular drawbar
Product available in very large quantity
16,49 €7040 PTS
WINTERHOFF WW8-H ball hitch for 800kg trailer with 70mm square drawbar
Product available in very large quantity
16,99 €7253 PTS
WINTERHOFF WW150-VF ball hitch for 1500kg trailer with 60mm square drawbar
Product available in very large quantity
39,99 €17072 PTS
AL-KO AK301 ball hitch for 3000kg trailer with 50mm pipe drawbar, cast iron
Product available in very large quantity
89,79 €38332 PTS
Rubber bellows - KNOTT KF7,5-KF30 protective rubber
Product available in very large quantity
9,99 €4265 PTS
Rubber bellows - KNOTT KF27-KF35 safety rubber
Product available in very large quantity
9,99 €4265 PTS
Trailer bellow - rubber protection for KNOTT overrun device KFG35
Product available in very large quantity
17,99 €7680 PTS
Shock absorber for overrun device AL-KO 251S 2700 kg - new model
Product available in very large quantity
68,99 €29453 PTS
- For the coupling unit:
- GVW:
KNOTT K14-A ball hitch for 1400kg trailer with 50mm tubular drawbar
Product available in very large quantity
35,89 €15322 PTS
AL-KO 251S overrun device with AKS3004 hitch for 2700 kg trailer with V-type drawbar
Product available in very large quantity
564,99 €241200 PTS
- Drawbar profile:
- GVW:
- Nose load:
AL-KO 161S overrun device with AK161 hitch for 1600kg trailer with square drawbar
Product available in very large quantity
391,99 €167344 PTS
- Drawbar profile:
- GVW:
- Nose load:
AL-KO 251S overrun device with AK270 hitch for 2600kg trailer with square drawbar
Product available in very large quantity
406,99 €173748 PTS
- Drawbar profile:
- Drawbar:
- GVW:
- Nose load:
AL-KO 2.8VB1 overrun device with AK351 hitch for 3500kg trailer with square drawbar
Product available in very large quantity
888,99 €379519 PTS
- Drawbar profile:
- Drawbar:
- GVW:
- Nose load:
AL-KO 2.8VB1 overrun device with AK351 hitch for 3500 kg trailer with V-type drawbar
Product available in very large quantity
706,99 €301821 PTS
- Drawbar profile:
- GVW:
- Nose load:
AL-KO AK351 ball hitch for 3500kg trailer with 60mm pipe drawbar, cast iron
Product available in small quantity
162,99 €69582 PTS
KNOTT KF13E overrun device with KK14B hitch for 1400 kg trailer with V-type drawbar
Product available in very large quantity
284,99 €121665 PTS
- Drawbar profile:
- GVW:
- Nose load:
KNOTT KF20A overrun device with K20B hitch for 2000 kg trailer with V-type drawbar
Product available in very large quantity
328,99 €140449 PTS
- Drawbar profile:
- GVW:
- Nose load:
KNOTT KF17A overrun device with K20B hitch for 1700 kg trailer with V-type drawbar
Product available in very large quantity
305,99 €130630 PTS
- Drawbar profile:
- GVW:
- Nose load:
KNOTT KFG30A overrun device with K35A hitch for 3000 kg trailer with V-type drawbar
Product available in small quantity
546,99 €233516 PTS
- Drawbar profile:
- GVW:
- Nose load:
On special offer
757,99 €682,19 €291234 PTSThe lowest price of the product in the 30 days before the sale: 757,99 €
KNOTT KFG35D overrun device with K35C hitch for 3500 kg trailer with V-type drawbar
Product available in very large quantity
- Drawbar profile:
- GVW:
- Nose load:
AL-KO AK270 ball hitch for 2700kg trailer with 50mm tubular drawbar
Product available in very large quantity
73,99 €31587 PTS
Shock absorber for trailers AL-KO 101VB/90S
Product available in very large quantity
88,99 €37991 PTS
- For the coupling unit:
AL-KO 60S/2 overrun device with AK161 hitch for 750kg trailer with V-shaped drawbar
Product available in very large quantity
248,99 €106296 PTS
- Drawbar profile:
- GVW:
- Nose load:
AL-KO 161S overrun device with AK161 hitch for 1600kg trailer with square drawbar
Product available in small quantity
410,99 €175456 PTS
- Drawbar profile:
- Drawbar:
- GVW:
- Nose load:
WINTERHOFF WW13-N ball hitch for 1500kg trailer with 45mm tubular drawbar
Product available in very large quantity
40,99 €17499 PTS
WINTERHOFF WW150-RB ball hitch for 1500kg trailer with 50mm tubular drawbar
Product available in very large quantity
42,99 €18353 PTS
WINTERHOFF WW150-VG ball hitch for 1500kg trailer with 70mm square drawbar
Product available in very large quantity
32,99 €14084 PTS
Support bracket for overrun device AL-KO 150 mm
Product available in very large quantity
8,99 €3838 PTS
- Material:
- Frame height needed:
KNOTT KF27B overrun device with K27A hitch for a 2700 kg trailer with a V-shaped drawbar and a support wheel bracket
Product available in very large quantity
364,99 €155818 PTS
- Drawbar profile:
- GVW:
- Nose load:
STEELPRESS ZSK-0750J ball hitch for 750kg trailer with 70mm square drawbar
Product available in very large quantity
24,89 €10626 PTS
STEELPRESS ZSK-0750C ball hitch for 750kg trailer with 50mm tubular drawbar
Product available in very large quantity
21,99 €9388 PTS
Overrun shock absorber 251S 2600 kg - old model
Product available in very large quantity
115,99 €49517 PTS
- For the coupling unit:
- GVW:
On special offer
96,99 €87,29 €37265 PTSThe lowest price of the product in the 30 days before the sale: 96,99 €
Trailer overrun damper 161S 1600 kg - new model
Product available in very large quantity
- For the coupling unit:
- 1
- 2
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!