All-City Super Professional Single Speed Bike - 650b Steel Goldust 46cm. All-City Super Professional Urban Cross Machine Built to continue the tradition of All-City’s esteemed Macho Man and Nature Boy 612 builds the Super Professional features the Master Dropout All-City’s first ever combination geared or single-speed sliding dropout system. Designed to be fast responsive agile and capable on mixed terrain the Super Professional can be converted from single-speed to geared and back again to crush all your daily deeds and commutes in the city.

612 Select Tubing

Features All-City’s cleverly designed beautifully crafted sliding dropout system

Signature fork crown with four-point rack mounts

Two bottle cage mounts plus mounts in front and rear for racks and fenders

12mm thru-axles flat-mount brakes

Stealth dropper routing

Tire clearance: 700c x 45mm or 650b x 47mm