Sure you can, it all depends on how much you want to spend.
There's lot's of room for a wider wheel/tire between the forks, it's just a question of whether or not you will still have room for the fender.
I you go with a generic aftermarket rim, you will likely have to get an axle made and relocate/modify your brake caliper brackets. If removing the fender, you will need a new fork brace with brake cable eyelets or else drop down to one front brake. The list can go on and on depending on what you want to do.
A forum community dedicated to Triumph Motorcycle owners and enthusiasts. Come join the discussion about performance, racing, cafe racers, bobbers, riding, modifications, troubleshooting, maintenance, and more!