Does anyone know of any other 20" studded tires that won't cost me $40 a piece like the innova tires at Harris (posted above)? I hate to spend $80 on tires for a $220 folder! By the way, a full review of my impressions of the Downtube VIII are forthcoming, as are pics of it with my homegrown lighting system (ala total geekiness) and all weather child transport system (i.e. a child seat with rain cover.)