The dealer says he has a set of wheel weights that go on the inside. Im going to look at those. I wasn't planning to load the tires.
Before you make the decision about whether to add wheel weights or not you may want to read several of the posts about using them on the smaller tractors. Most people opt to fill the tires with windshield washer fluid or beet juice. I use windshield washer fluid in mine. The wheel weights for these smaller tractors only weigh about 40 pounds each side and don't really add any realistically usable ballast for hauling with the FEL. You can actually get better stability and even a little more ballast using WWF or beat juice.
One more consideration about wheel weights is that they may not be usable if you add spacers later. Since many people add spacers for stability yoju may check out the threads on those too.
You have time to make those decisions later, after you have used your tractor for awhile. You do not have to make those decisions right away. You may also want to read threads by people that have a similar size tractor as the one you are getting. I think all of the BX18xx series are very similar in size to yours. There are many similarities between the other BX series tractors too so don't ignore posts from those owners either.