I have a 2017 Honda Foreman TRX500. I have put a 2 inch lift on it and 2 inch wheel spacers. I currently have 27 inch Silverback Gorilla tires on it. It's time for new ones but I want to know what's the largest tire I can go with since I have the 2 inch lift and 2 inch spacers?

 

Doubt if anyone can help as 27" tyres are a fairly wild choice. I can't remember if the Foreman has a hi/lo gear as well as the 5 speed but you are raising the gear ratios quite a lot already, with 27" tyres. The clearance for anything bigger will need to be checked by measuring how much is left with the existing tyres, full lock to inner wheel arch plastics (footwells) at the front, and clearance to footwells and silencer at the back. Don't forget, on full bump clearances may be less.