B3030 has no adjustment for moving wheels out further than the 53.8" listed in specification. There is a set of spacers that can be purchased from dealer to move each wheel out about 1 1/2".
B8200, B7800, B2710, B2910B3030 and B2630 all use the same wheels. The spacers for the B3030 should fit all these tractors. Here is a thread with part numbers. Click Here
Please be sitting down when you see the price. /forums/images/graemlins/frown.gif
There are other links in the thread on how to make your own.
I just spoke with the guy at TractorSmart.
He said he cannot sell the spacers anymore.
He gave me the part # B8785 SPACER KIT with a list price of $242.
He said that I should be able to order from my local dealer.