I've been riding Marathon tires on my folder for nearly three years now. I put the stock Stelvios on for special occasions, but they're hardly suitable for a daily commute (rubber gets chewed-up pretty badly). The current set of Marathons is about toast from wear. I'm thinking of going with Marathon Racer tires for something a little faster but nearly as durable. This is for a 29 miles RT commute entirely in NYC (I ride the folder for this maybe three times per week). Any thoughts?