Now crafted from A.C.E tubing — All-City’s proprietary air-hardened, custom-designed, extruded steel tubing — the Nature Boy’s expertly engineered butting profiles and wall diameters provide advantages that even the most excellent off-the-shelf tubing just can’t match. Stronger, lighter, quicker, and stiffer than ever, it’s simply unlike any other singlespeed in the world.
Featuring modern race geometry and an ovalized top tube for easy shouldering over obstacles, we’ve increased the Nature Boy’s mud clearance to eliminate unnecessary pit stops on the course. Built with an Eccentric Bottom Bracket to manage the chain tensioning, a shortened chainstay, and replaceable derailleur hanger, we’ve also outfitted the Nature Boy with a Columbus Futura carbon fork with adjustable rake, tapered head and steerer tubes, and clearance for 700c x 42mm tires.
With a fresh Fulton green and black splatter paint job, all the All-City custom touches you’ve come to expect star here too, including custom seat collar and dropouts, flat-mount brakes, and star reinforcements on the bottle bosses. For steel lovers starving for competition, these updates to the Nature Boy are destined to get you across the finish line faster than ever before.
Frame Material: All-City A.C.E. Air-Hardened, Custom, Extruded steel
Fork Material: Carbon with carbon steerer
Hub Spacing: 142 x 12mm; 100 x 12mm, thru-axle
Brake Mount Type: Flat Mount
Rotor Size(s): 140mm to 160mm
Seatpost Diameter: 27.2mm
Seat Collar: All-City Signature Brazed-On
Max Tire Size: 700x42
Tire Size Range: 700x30 to 42, optimized for 700x33
Front Derailleur Mount: 28.6 Band Clamp
Crankset (Max Ring)1x: 50t max
Bottom Bracket: 68mm English
Extras: Custom tapered headtube with external headset, E.D. coated for durability and rust prevention
Mfr Claimed Weight
NOTE: Sold as a frameset only (frame + fork + thru axles)
Not sure which is the correct size for you? Need help planning your build? Contact us at email@example.com for an obligation free consultation - we love talking bikes and are always happy to help.