Caravan Trailer Parts Blog

Welcome to our caravan trailer parts help page.
If you are towing a boat trailer, caravan, camper trailer, box trailer or heavy vehicle trailer you can find articles here that will help you install, operate and maintain the quality trailer and caravan parts that Couplemate manufactures. From tips & tricks, FAQ’s to Australian Road Rules and Regulations we’ve tried to cover it all. If there’s something in particular that you’re looking for and you can’t find it here then give our friendly staff a call on 07 3348 3822 and we will try to help any way we can. If there’s something you would like to see listed on our help page or a topic you would like to be discussed then send us a message by using our page and we will do our best to accommodate your request.
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Our Latest Know How Posts

Read our most recent posts here. Couplemate periodically posts articles relating to trailer & caravan towing safety. For archived technical tips & tricks articles or towing products news check the Category menu.

What is my Wheel PCD

What is my Wheel PCD

“I have no idea what PCD is nor do I know how to calculate it?”….is an answer we hear frequently from customers. Technically, Pitch Circle Diameter (PCD) is the diameter of the circle which passes through the centre of the wheel studs, wheel bolts or wheel rim holes.

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How to measure Rim and Tyre Backspace

How to measure Rim and Tyre Backspace

Wheel backspace is an essential measurement for the manufacture of axle length. The first thing you need to do when building a new trailer is to buy your rims and types.

Alternatively, you could purchase your rims and tyres from us and we’ll do the calculation for you. One more complication, we need to know your chassis width.

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