My go-to for 200mm on my Kaly board are Kendas. I’m not sure 200mm would fit on the Explorer, I’m already close to wheelbite on mine with 155mm. but I’m on DKP and super loose bushings, so take that with a grain of salt(see above post).
IMO 155mm BKB’s are perfect for street riding and decent enough for offroad.
This thread might be helpful for you if you really want to try 200mm’s