I've been using the Pro series for years (Axial, Pro 2, 3) and love them but just installed the Pro 4s. I bought 23mm as I always have. They seem a tad narrower or taller vs the older Pros--is this an accurate observation? That said, I'm about to restock and wonder if I should go to 25mm instead? I don't road race, just fast training and weigh 170 lbs. Thanks.