Uhhh, no contest. Tucson is absolutely better for riding. Wanna train with the Garmin development team? How about Jelly-Belly guys? Tom Danielson was climbing Mt. Lemmon the other week. Oh, and tons of pro triathletes in Tucson. No contest. You will never need to put your bike in a car to access great riding. 9Kft mtns, rolling hills, flats, hammer fest (Shootout) and mtn biking too. And less traffic.