I sincerely hope that your Traveler is a better version than my Marathon/Tour... otherwise buy a portable camera and sell your footage for Premium Rush II!

Thankfully tires are cheap in North America; I've been looking for 700x32 tires in the local market and can't find anything worth spending on, and the width of the rear chain-stay on the Commuter 1 probably won't fit anything larger than 32 mm