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All-City Nature Boy A.C.E. - 2020

All-City Nature Boy A.C.E.
  • Color: Highlighter Green Spatter
  • Color: Highlighter Green Spatter
  • Color: Highlighter Green Spatter
Highlighter Green Spatter
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A singlespeed cyclocross sibling to the Macho King A.C.E., the Nature Boy A.C.E. comes primed for racing, covering quick up-and-downs, and cutting through the gnarliest of courses.

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 and fender mounts. 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.

- A.C.E steel tubing: All-City’s proprietary air-hardened, extruded steel tubing, custom designed to be lighter and stronger for riding and racing
- Contemporary race geometry, raised bottom bracket, shortened chainstay, and increased mud clearance
- Ovalized top tube for easy shouldering over barriers
- E.D. coated for durability and rust prevention
- Built-in seat clamp and internal rear brake cable routing
- Columbus Futura carbon fork with adjustable rake
- Fits 700c x 42mm tires

WARNING: This product can expose you to chemicals known to the state of California to cause cancer and birth defects or other reproductive harm. For more information, go to

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 All-City A.C.E. Air-Hardened, Custom, Extruded steel
Fork Columbus Futura carbon fork
Headset Cane Creek 40 Series
Rims/Wheels WTB ST Light i23 28h
Hubs All-City Go-Devil 28h
Spokes WTB 14/15 black, Black Brass nipples
Tires WBT Cross Boss 700 x 35c TAN Sidewall DNA Compound, Lightweight Tubeless Casing, UST Aramid Bead
Crankset SRAM APEX 40t XSYNC
Bottom Bracket PF30 Eccentric - SRAM and Shimano Spacer kit
Chain KMC X11 EPT Anit-Rust
Cassette/Rear Cogs 18t Singles Speed cog w/ Spacer Kit
Tape/Grips All-City Super-Cush w/ Locking Alloy All-City End Plugs
Stem Whisky No. 7
Brake Levers TRP RRL Black
Brakes TRP Spyre Flat Mount, 160/140 TRP rotors
Saddle All-City Gonzo
Seat Post Whisky No. 7

* Subject to change without notice.

Part Numbers

Option UPC MPN
Highlighter Green Spatter / 46cm 708752269057 BK0236
Highlighter Green Spatter / 49cm 708752269071 BK0237
Highlighter Green Spatter / 52cm 708752269095 BK0238
Highlighter Green Spatter / 55cm 708752269118 BK0239
Highlighter Green Spatter / 58cm 708752269132 BK0240
Highlighter Green Spatter / 61cm 708752269156 BK0241