It’s a cyclocross frame. If you’re into that sort of stuff, it’s good fun. It has clearance for 700C*38mm tires or 650B*1.9″ tires. It can take a 42T single chainring or a 52/36T dual chainring setup. It has a threaded BSA bottom bracket. It has a nice big triangle with a flat underside of the top tube to make it easy to shoulder when riding ‘cross.