TRAILER SIZING

this page is still under construction!

this page is still under construction!

A. Rear of transom bottom to bow eye
Rear of transom bottom

The rearmost point of the bottom of the transom.

Bow eye

Bow eyes can differ greatly in size and shape. If there are multiple holes in your bow eye, pick the point in your bow eye where you expect the winch hook to attach and use that point for all measurements involving the bow eye.

B. Rear of transom bottom to midpoint of wheels

Not an essential measurement. It helps us determine if the axle placement will differ greatly from the normal spacing, but if you don’t have a trailer don’t worry about this.

Midpoint of wheels

If you have a single axle trailer, then use the wheel centre of your wheel.

C.i) Bow eye to front of boat
Front of boat

Includes anchors, rails, or any other protrusions to the front. We use this measurement to make sure you’ll have enough distance from the back of your car.

C.ii) Bow eye to front of towball
Front of towball

Helps us determine weight distribution and the maximum we can bring your boat forward, if you don’t have a trailer don’t worry about this.

D. Horizontal distance from point on the bow (point X) that is 140mm higher than the flat of the keel, to the vertical point below the bow eye

The best way to find point X is using a string line along the flat of keel and measuring 140mm above it. You may also be able to use a flat piece of wood, or if the ground is flat and the boat is sitting very level then you could measure the height differential from the ground to the keel at the flat, and find the point where the keel is 140mm higher than that.

E. Bow eye height above flat of the keel

This measurement doesn’t have to be as precise as D, as we can adjust the winch height very easily during the boat fit. As long as the measurement is accurate to within 100mm this will let us know if there are any issues.

F. Transom width at chines & G. Deadrise height

Ideally, we want to know the height differential between the bottom of the transom and the lowest point on the transom that is further than 980mm from the centre of the transom. This will tell us if the chines will clear the mudguards (which sit 980mm from the centre of the trailer) or if the keel of the boat will have to be raised.

H. Approximate total weight of boat + motor + current trailer

Or any weight information you can provide that will help us determine the ATM of the trailer you will require. If you already know the ATM of the trailer you want, write this in instead.

I. Hull material

Self explanatory

J. Keel shape

If you have a block keel that ends before it reaches the transom (very common with aluminium boats), please measure the distance from the rear of transom bottom to the point where the keel is full height.

J. Keel type

If you have a flat keel, please measure the width of the flat of the keel, and measure how far it takes to taper into a point. 

If you have a curved keel, please measure the width it takes to reach 5mm height. 

If you have a block keel, please measure the height and width of the block.

If you have a different shaped keel (e.g. V-shaped) please indicate.

Other

If you have any gadgetry (transducers or otherwise) that we may need to account for when determining how the hull will be supported, please take a photo showing position on the boat. Hanging off the rear of transom is the most common position, which we can account for by making sure the bunks don’t overhang at those positions. If there are any devices on the bottom of the hull, we will take these into account to make sure they can’t be knocked off while launching/retrieving.