I know this is an old thread, but I'm curious what you decided. I just ordered the men's version of the same bike but won't be able to pick it up for a few more weeks (so I haven't seen it in person yet). My anticipated riding sounds very similar to the type you do, and I am also a little hesitant to stick with the 28s. I definitely preferred 32s on the bikes I was able to test ride locally. I can't find much information about this bike online, so I'm hoping you can also tell me what the maximum width tire this bike/rim will accept. I wouldn't go any wider than 35, and probably would stick with 32. But I'm still curious to know what my options will be. And one more thing, if you stuck with the stock tires, what did you think of them (rolling resistance, durability, etc)? Thanks.