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All-City Nature Boy Disc Frameset

All-City Nature Boy Disc Frameset
Image differs from actual product. Complete bike shown.
$625.00 - $782.00
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The disc brake version of All-City's iconic Nature Boy singlespeed cross frameset. Like its cantilever brethren, the Nature Boy Disc carries all of the AC hallmarks that you've come to expect: beautiful lugged fork crown, custom dropouts, custom BB shell, signature head badge, and an E.D. coating for rust protection. It has proven race-inspired geometry in a durable 612 chromoly steel frame with chromoly tapered fork, and since you'll want to ride this cross bike every day, it's got plenty of room to fit large tires and even fenders. For racing, cruising trails, gravel, or daily commuting, disc brakes and a single-speed setup provide unmatched control and reliability.

WARNING: Cycling can be dangerous. Bicycles and bicycle products should be assembled and serviced by a professional mechanic. Never modify your bicycle or accessories. Read and follow all product instructions and warnings including information on the manufacturer’s website. Inspect your bicycle before every use. Always wear a helmet.


Frame 612 Select ChroMoly steel. Double butted down, top, and seat tubes. Externally tapered, ovalized, and dimpled chain stays, tapered seat stays, 135mm horizontal dropouts
Disc brake compatibility only: 160mm max rotor
Tire clearance: 43/46/49cm accepts 650B up to 42mm
52-61cm accepts 700c up to 38mm
35mm maximum width with fenders on all sizes
Fork 4130 ChroMoly tapered fork blades, lugged crown and matching dropout. Straight steerer tube
Headset 1-1/8" threadless, EC34 upper & lower, Crown race 30.0
Axles Rear: 135mm rear spacing
Bottom Bracket 68mm English
Accessories & Extras Fender mounts, ED coated, Hennepin Bridge dropouts with built-in chain tensioner

* Subject to change without notice.

Part Numbers

Option UPC MPN Store SKU
Green/White / 43cm 708752172593 FM8400 ALL42223085E
Green/White / 46cm 708752172586 FM8401 ALL42338525E
Green/White / 49cm 708752172579 FM8402 ALL42656557E
Green/White / 52cm 708752172562 FM8403 ALL42825325E
Green/White / 55cm 708752172555 FM8404 ALL42183758E
Green/White / 58cm 708752172548 FM8405 ALL42179632E
Green/White / 61cm 708752172531 FM8406 ALL42827393E