Nature Boy

The Nature Boy is our single speed cross racing monster.  It was named after a Minnesota professional wrestling legend and carries all of the AC hallmarks that you’ve come to love: straight blade fork, classic paint, custom dropouts, and signature headbadge.  It was designed primarily as a race rig, but since we knew that many of you out there would be using this thing for every day life, we built in additional features to make it more versatile. 

You’ll find hidden fender mounts, two sets of bottle bosses (reinforced of course), removeable canti studs, fat tire clearance, and a steel fork that is easily swapped for a carbon model should you want to lighten up for race season. 

Race the crap out of it, ride singletrack, gravel, or commute until your heart’s content. 

*Bike pictured not actual complete bike spec


Features

 E.D. Finish:  The entire bike is E.D. coated inside and out.  E.D. coating not only improves the quality and durability of the paint, but is the best rust proofing agent that we have at our disposal.  With the E.D. coating there is no need to Frame Saver the bike, it’s already done for you.

Internal cable routing:  The internal rear brake routing not only improves the beauty of the frame, but also provides the ultimate in comfort when grabbing the top tube to shoulder the bike.  Once you try it, you’ll wish all of  your bikes (where appropriate) had this feature, and since the entire bike is E.D. coated there’s no worries about the cable channel rusting.

Cross race geometry: This bike was designed to go real fast off road.  It features aggressive yet traditional cyclocross racing geometry and goes like hell.

Tire clearance: You can fit 38’cs in this bad boy front and rear, no problem.  If you’re running fenders it’ll clear 35’s.

Signature Dropouts: Investment cast from stainless steel, featuring built in chain tensioners, and the timeless Hennepin Bridge icon. 

Removeable brake studs:  This is a nod to our fixie riders. If you’re not using them, remove them for weight savings and clean lines.

Subtle fender mounts:  We hope you ride this bike in all conditions all year long, so with that in mind we added fender mounts.  Since this is a race bike and we think traditional fender eyelets on race bikes are ugly, we hid the rear ones on the inside of the seat stays, and placed the fork fender eyelets on the blade to keep the look clean.

Build Specs

Frame | All-City Nature Boy
100% full 4130 ChroMoly steel. Double butted down, top, and seat tubes. Externally tapered, ovalized, and dimpled chain stays, tapered seat stays

Fork | All-City Nature Boy
4130 ChroMoly double butted tapered fork blades, lugged crown and matching dropout

Headset | Cane Creek S3
Black, 6061 T6 aluminum, Black Oxide ACB bearings, 97.5g 

Stem | Kalloy AS-007
Black, four bolt, 1 1/8th threadless, 31.8 clamp

Handlebar | Kalloy HB-CR21
Black, alloy, single groove, shallow round drop

Tape | Velo
Black cork

Brake Lever | Tektro RL340
Black, aero

Brake | Tektro CR520
Black, cantilever, wide Euro style

Crankset | FSA Vero
Black, alloy, forged, 42 tooth ring

Bottom Bracket | TH Industries
Steel cups, sealed bearing, 68X110mm

Seatpost | Kalloy SP-373
Black, alloy, single bolt, 27.2mm

Saddle | AC Standard Saddle
Black, comfy, racy, w/logo

Freewheel | 16 tooth
Black, 3/32”

Chain | KMC Z610HX
Silver, 3/32”

Hubs | All-City Standard
Black, 130mm rear, Fixed/Free, 32 hole

Spokes | DT Swiss Champion
Black with silver brass nipples

Rims | Alex Race 32
Black, 32 hole, 32mm deep, machined brake track

Tires | WTB Pathway Comp
700X32c Steel bead

Tubes | Cheng Shin
700X28 Presta Valve 

Part Numbers

Part Number Size Color Description  
BK4720 46cm Awesome Lime Color Nature Boy Complete 46cm  
BK4721 49cm Awesome Lime Color Nature Boy Complete 49cm  
BK4722 52cm Awesome Lime Color Nature Boy Complete 52cm  
BK4723 55cm Awesome Lime Color Nature Boy Complete 55cm  
BK4724 58cm Awesome Lime Color Nature Boy Complete 58cm  

Geometry

Geometry
 Size46cm49cm52cm55cm58cm61cm
(A)Head Tube Angle70.57171.57272.572.5
(B)Seat Tube Angle7473.5737372.572.5
(C)Top Tube Length520535550565585605
(D)Seat Tube Length485.6515.5545.4575.4605.3635.3
(E)Chainstay Length415420420420420420
(F)Bottom Bracket Drop707070707070
(G)Fork Offset454545454545
(H)Axle to Crown395395395395395395
(I)Head Tube Length95110130150175200
(I)Wheelbase985.7997.41003.61014.41024.21044.2