your local tyre depot should be able to sort you out maybe not exact same size but something similar that will do your job equally as well, make sure if you just take the tyres and rims to them, you expain it s for a caravan and what weight it is.
Claire, try www.tyreline.com/tyreline.htm and select caravan trailer tyres.
They have a 145 13 which by the photo is 70 - 80% ratio. With a width of 145 it is only really suitable for a light van possibly 800kg MPTLM. If you have the room in the wheel arch I would suggest that 165-13 would be a good upgrade.
Hi Claire, you can ignore the number 80 in the tyre size any other number would mean it was a low profile, just go to any tyre shop and ask for a 145/13 reinforced tyre, but i think the smallest reinforced tyre you will get is a 155/13 for about
Yes, the correct load index is important. You can usually find it on the sidewall behind the details of tyre size (usually a number between 80 and 100)