It's nice to see that now again arrive reinforces good V-Brake gums from different manufacturers on the market. Kool-Stop and Swiss-stop had me on my Avid Single Digit 7, I'm going to MTB and everyday bike, always prefer. These ones are very soft, so you should pack up short and strong, not too much driving with slipping brake, then they also hold for a while. In drought they are excellent in the wet you have always wanted short dry braking, then they pack even with spontaneous braking at amazingly well. Rear little lax because stronger grab is required. I brake very rare back, mostly to support.