Size small (50 cm) Can send more photos to show excellent condition of all parts. Great for someone who usually locks their bikes outside. Just need one u lock to lock the bike. Other parts are taken care by untitheft nuts and bolts. Adding shwinn rear rack as well. I have brand new timbuk2 pannier pair, will add to it with additional - $60, Even though the link says medium, the bike is small {url removed} This is the link, I used this as secondary bike {url removed}