November 11, 2018
26x4 Pro & Sport version
Pro Verion: Lightweight, low rolling resistance (I have seen the study that suggested otherwise, but that is not my actual experience). Supple Casing.Good profile for mixed condition riding. Sport Version: Inexpensive, especially on sale
Pro Version: Thin sidewall, might not be great for rocky areas. Small knobs, which aren't great for some conditions. Sport Verion: not supple, not as light.
Get the pro tire if you want to lose some weight on your bike. The sport versions cost less, but there is a big difference both in weight and ride quality. The 4.5 versions have much bigger knobs, but I can't speak to them. I really like the 26x4 pro version of this tire.