Thread: D3 Rims on a Boat Trailer

The problem is caused by you having been supplied with a backing plate for use with 1.75" shoes and matching drum, yet have been suppied with a 2.25" drum. As your drums are special order, Melb Trailers are unlikely to take them back so would provide 2.25" backing plates and shoes. I suspect that you could do with the extra braking capacity anyway considering the larger wheels.

Even if you specified 1.75" shoes, the supplier made a mistake by sending incompatible hub-drums and backing plate sets so I would be asking for a nil charge change-over of the backing plates.

Originally Posted by Graeme

The problem is caused by you having been supplied with a backing plate for use with 1.75" shoes and matching drum, yet have been suppied with a 2.25" drum. As your drums are special order, Melb Trailers are unlikely to take them back so would provide 2.25" backing plates and shoes. I suspect that you could do with the extra braking capacity anyway considering the larger wheels.

Even if you specified 1.75" shoes, the supplier made a mistake by sending incompatible hub-drums and backing plate sets so I would be asking for a nil charge change-over of the backing plates.

So I'm assuming the backing plate for this drum I have is a flatter plate allowing the drum to go back further??

The plate they have supplied is raised and is not allowing the drum to go back far enough to allow the bearings to seat on the axle!!

The backing plates for the wider shoes are shaped to go back past the mounting plate whereas the ones you have been supplied with come forwards from the mounting plate. I'll post a pic of the back of one of mine to show the difference.

Originally Posted by Graeme

The backing plates for the wider shoes are shaped to go back past the mounting plate whereas the ones you have been supplied with come forwards from the mounting plate. I'll post a pic of the back of one of mine to show the difference.

Thanks Graeme, just thinking, there must be an axle to suit this combination and I'm assuming the stub section of the axle will be longer, right??

Here's a backing plate for 2.25" shoes and matching drum. See how the plate is stepped back away from the drum compared with a backing plate for 1.75" shoes.

Originally Posted by Redback

Thanks Graeme, just thinking, there must be an axle to suit this combination and I'm assuming the stub section of the axle will be longer, right??

No, they use the same stub axle.

Edit: You could have fitted 10" brakes to the same stub axle.

Originally Posted by Graeme

Here's a backing plate for 2.25" shoes and matching drum. See how the plate is stepped back away from the drum compared with a backing plate for 1.75" shoes.

Yes I see the centre where it bolts to the mount on your plate that it is not raised like on the ones I have been supplied.

We will ring them Monday, I'm sure they will realise their mistake and send us the correct backing plate.

I thought you could only get the wider drum hub in 10", guess I was wrong

Thanks Graeme,

Baz.