Skip to main content
Find a Retailer
Nature boy purple against blue background

Nature Boy

The Nature Boy is our singlespeed cross monster. It’s as popular on the race course as it is on the city streets.

It carries on the tradition of classic steel cross bikes, with the addition of our standard AC hallmarks: beautiful lugged fork crown, internal cable routing, Hennepin Bridge dropouts, brazed-on seat collar, custom BB shell and our signature head badge. Everything is E.D. coated for longevity and rust prevention.

Since cross bikes are perfect for everyday living, you’ll find hidden fender mounts and two sets of bottle bosses (reinforced of course). There’s clearance for 38c tires with plenty of room for mud. The steel fork is easily swapped for a carbon model, should you want to lighten up for race season. 

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

SPECS & GEO

  • Headset + Cane Creek 10 series
  • Stem + Salsa Guide, 1-1/8th threadless, 31.8 clamp
  • Handlebar + Salsa Cowbell 3, 31.8
  • Tape + Black
  • Brake lever + Tektro RL340
  • Brake + Tektro CR720
  • Crankset + FSA Vero 42t
  • Bottom Bracket + 68x110mm steel cups, sealed bearings
  • Seatpost + Kalloy 27.2
  • Saddle + All-City Gonzo
  • Freewheel + 17t 3/32
  • Chain + KMC Z610
  • Hubs + All-City Standard Fix/Free 32h
  • Rims + Alex XC23 32h
  • Tires + Kenda Small Block Eight 700x35 steel bead
Nature boy frame geometry diagram
Size 46cm 49cm 52cm 55cm 58cm 61cm
Head Tube Angle 70.5 71 71.5 72 72.5 72.5
Seat Tube Angle) 74 73.5 73 73 72.5 72.5
Top Tube Length) 520 535 550 565 585 605
Seat Tube Length 460 490 520 550 580 610
Chainstay Length 415 420 420 420 420 420
Bottom Bracket Drop 70 70 70 70 70 70
Fork Offset 45 45 45 45 45 45
Total Fork Length 395 395 395 395 395 395
Head Tube Length 95 110 130 150 175 200
Standover 756 778 802 827 853 880
Wheelbase 985.7 997.4 1003.6 1014.4 1024.2 1044.2
Stack 526.2 542.2 563 583.9 609.6 633.4
Reach 369.1 374.4 377.9 386.5 392.8 405.3
Handlebar Width 40 40 42 42 44 44
Stem Length 80 90 100 100 110 120
Crank Arm Length 170 170 175 175 175 175
  • Frame + 612 Select ChroMoly steel. Double butted down, top, and seat tubes. Externally tapered, ovalized, and dimpled chain stays, tapered seat stays
  • Fork + 4130 ChroMoly tapered fork blades, lugged crown and matching dropout. Straight steertube
  • Rear spacing + 130mm
  • Brake Compatibility + Cantilever, Linear Pull
  • Seatpost diameter + 27.2
  • Steertube/Headset + 1-1/8" threadless, EC34 upper & lower, Crown race 30.0
  • Bottom Bracket Shell + 68mm English
  • Chainring clearance + 49 Tooth max
  • Tire clearance + 700x38
  • Extras + Fender Mounts, ED coated
Back to top