I run the PB Cascadias for Hybrids on my bike. I replaced the factory 38mm Kenda tires with 35mm Schwalbe Marathon Winters for the upcoming snow and ice. It was raining cats & dogs during my commute this past Wednesday and I found the tires caused no more spray around the fenders than did the Kendas. In all fairness both tires have a "chevron" tread pattern which I understand to be engineered to "grab" the water and throw it to the sides. Both tires do that so well that if I traverse deep (over 1") water my feet get soaked. I would use wider fenders if they would fit but they don't so I wear waterproof footwear on wet days.