There are a ton in this area so your friend will have his pick. If he's wanting a road bike I would recommend Domenic's Cycling on Mill ave. right across from ASU. They really know there stuff and when I was first looking for a bike they were really helpful and answered my questions in newbie terms! You might also want to try Bike Barn if you are more into phoenix,
bike barn . I only really like going to tempe bike for their sales. Paul L, are you a roadie? Ive been looking for some new ride routes, you have any?