This is good, mid-range model for the era. at a very attractive price. The rim manufacturer is Wolber. I've never had any problem with them. Before I went spending any further money on upgrades, I'd spend a season riding the bicycle, to see if you really like it, as some people don't like oversize aluminum. A competent, fairly fit cyclist will easily average that pace for that distance on that bicycle. Once you're at that level of bicycle, spending a lot more, doesn't buy much difference in speed, unless it's something like an aero wheelset.