Triumph Thunderbird 900 Cc - Tiers - Brat Look

Hi

Just became a happy owner of a Triumph Thunderbird -02, and after my first hours on the bike I'm very happy!
The bike needs new tires, my guess it't the originaly tiers from 2002, so given the years I will repalce them with some new ones.
My intention is to slowly change the look of the bike to become more of a Brat-bike. TIers are esential for the look and I'm well aware that without repacing the front fork given the struktur of the fender grips on the orignal forks, so guess I'm stuck with the orignal size of the front wheel.
Orignal dimensions are:
Front: 100/80 ZR 18
Rear: 150/80 ZR 16
Any recomendation or experince of tiers that could enhance the look would be appricated.
Maybe just at slight bigger wheel in on the rear could help. Also models that are a littel bit more "agressive" in the look.
Thanks for advice!