I have just started commuting on the bike and although I am riding the same MTB (now 15 yrs old) with runners and toe clips, I did lash out and buy a set of bike shorts (the MTB type with pockets etc but with a chamois). My left big toe goes numb when I ride! The only difference to the setup I have ridden for years are the shorts and a few years of age. Reading Bicycling Aust Mag, an article on seats mentioned genital numbness as a consequence of a poor seat, but toes? I am going to assume the combination of shorts and seat might be doing it and I am sitting on a nerve or something. Does anyone know where this nerve would probably be located and should I be after a wider or narrower seat? On the plus side, the winter cold won't bother me if I am already numb!