The most commonly used type of tow bar in the UK is the flange tow bar; where the tow ball is bolted to the tow bar with two 24mm bolts.
There are also some variations of the flange tow bar type that have four bolts instead of two. This is the most versatile design of tow bar because it can be used with the ‘ball and pin’ type attachment used more commonly in the plant and farming industry. The flange tow bar is available in both fixed and detachable styles.
In the E.U. the most common tow bar type is the swan neck tow bar. This is where the tow ball and the neck are all one piece of the tow bar. This type of tow bar is becoming more popular in the U.K. due to the appearance of the bar looking neater and with the bar being narrower it is less likely to trigger your parking sensors.
This type of bar is a little less versatile than flange style; you can either tow or attach a cycle carrier but you can’t use both at the same time. The swan neck tow bar can also be used with an AL-KO stabiliser without the need for modification. The swan neck type is available in both a detachable than fixed style.