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Trailer Brake Cables

Need help identifying the correct brake cable?


Then use this comprehensive step-by-step guide on how to find the correct brake cable for your Trailer.

Step 1: Cable length.

If you're buying a replacement cable, you can measure the Outer Cable Length of your current cable, otherwise you'll have to manually measure the correct length on your trailer. It's only important to have one of the two measurements.

Step 2: Brake Connectors.

This end of the cable connects directly to the brake drum, and comes in two varieties; detachable and non-detachable.

Detachable connectors are found on all brands of cable,and can be disconnected without having to remove the entire drum. The inside diameter of the bell on a detachable cable can be measured to find the cable make.

The measurements are as follows:

AL-KO = 23.5mm diameter,

BPW = 23.3mm diameter,

Knott = 18.5mm diameter.

Non-Detachable connectors are only found on certain Knott cables, and the entire brake drum must be removed to connect and disconnect them.

Step 3: Balance Bar Connectors.

This end of the cable connects directly to the balance bar on the trailer, and comes in 3 varieties; Threaded, Clevis, and a Pronto end (also known as a Mushroom end, quick fit end, etc.)

Threaded Ends are found on all BPW cables, some Knott cables (including all non-detachable cables), and only Old-Style AL-KO cables. They're passed through a hole on the bar, and fastened with nuts.

Clevis Ends are exclusively found on select Knott cables, and usually fit older Peak braking systems. They attach using a standard clevis connector on the balance bar.

Pronto ends are found on some Knott and all New-Style AL-KO Cables. They attach by sliding into a slot on the balance bar, without needing any kind of tools or fastening.

Cable Material:

Most Knott and AL-KO brake cables come in two versions: a standard version, and a stainless steel version. The AL-KO ones also come with a a plastic covering on the inner cable, and are called Profi Longlife cables. The dimensions and function of the cables are identical, but the stainless steel versions have longer lives and are more durable.

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