so you can run wider tires and wider wheels. if you still run latex its nice to not pop your tires on a steep hill. Yes I have done it before with latex.
How wide do you need to go for a Tri/TT bike?
For the front, narrow is still aero. For the rear there’s no downside to going wider so long as the tire is mounted to a suitably wide disc and properly shielded by the seat tube. The air back there is quite turbulent and, if anything, a wider surface would be easier to attach to and possibly aero positive.