C17 rims are considered very narrow in road cycling these days. It's been a few years since 17mm were new and upcoming. Campagnolo widened their Zonda wheelset

C17 rims are considered very narrow in road cycling these days. It's been a few years since 17mm were new and upcoming. Campagnolo widened their Zonda wheelset to C17 in, easy to remember, 2017 and they were late. The goal of performance oriented riders (for many, fixated might be the more accurate description) these days is to run the widest possible rim that will still hold their tire width of choice reasonably well. This has several reasons. One is that wind tunnel treats have repeatedly shown that there's an aerodynamic sweet spot where the rim is slightly wider than the tire, despite the increase in total frontal area for a given tire width (google "105 rule"), another is that riders want the suspension benefits of lower pressure but as little as possible of the downsides of the extra drag of wider tires, the extra mass of wider tires, increased danger of pinch flats and decreased lateral stability. Wider rims help with all those compromises.