Thank you, and yes, the tail bag is pretty large--45 liters to be exact. I had to go to that size to be able to hold a full-size helmet in it with a few extras. As for what I normally carry in it, I use the bike to commute to work, and so I usually have my purse & a 2nd bag containing my work clothes, as I always wear full-protective, dedicated bike gear to ride, meaning I change clothes at work. I avoid saddle bags as I lane-spilt, and therefore, want to maintain a narrow bike profile. The bag can be removed with a key when I don't need it, and I agree with you in not liking backpacks, which I consider to be unsafe in the event of an accident. Plus, they're hot and interfere with my jacket's airflow.
