i've been wanting to go 47x17 for the mucho skid patches, but it's only 2" taller than my 44x16 that i'm running now. and since i don't skid all that much it's kind of a moot point. i really like 44x16 though. i ran my commute a week on it and my average comfy cruising speed was ~17mph and i could still hit ~24 if i had to. according to the computer my top speed for that week was just over 26. but i'm sure it just touched it and then i got tired