Any of the mechanics that do brakes should be able to do trailer bearings also. You can do them yourself if you want to save a few bucks. If you do bring them in to be done, it is a good idea to have the bearings already and just let them change them out for you. You can usually pick up kits for around $20 which includes the bearings, race & seal & cotter pin. You will need 2 kits if you are doing both sides and you will need to know what size and if they are tapered or not. Most small trailers are usually 1" or 1 1/8". Just make sure that they change out the races too, most of them will just try to change out the bearings. Hope this helps some.