yeh when you build a new wheel the rim has to be centre to the hub there is a tool you can buy to check how far out you are, in your case the rim seem's to be to far over the to the left if you dont want to pay and have it done propperly losen all the spokes on the left side and tighten all the spokes on the right therefor pulling the rim over to the right, i had the same problem when i first built my rim on my 26 and it just takes practice hope iv helped any sean