I'm primarily a mtn biker, but I was looking to get something to ride on roads. I rode a 2015 Diamondback Interval carbon flatbar road bike - I really liked it and the price was very good. The problem is the gearing, it has 50/34 in front and 11-28 (I think) cassette w/Shamano 105 derailleur in back. I live in western PA, where we have a lot of short, but very steep hills, and I don't think I'm going to get up some of them in that combination. Shamano says 105 is limited to 30T cassette, but Shamano's mtn derailleurs say they are limited to 36T, and people use 40T and 42T with no problem. Does anyone have any experience mating a 105 derailleur to a larger big ring in their cassette (32T, 34T, 36T)?