Titanium O’Beast Frame

Dialed Fatbike Geometry in a Versatile, Classy Frame

At Carver bikes, we pride ourselves on having an eye for the newest developments in the industry and we’re often one of the leaders when it comes to new offerings in the bike world. Our fatbike is no exception…we designed and built up our first demo almost immediately upon the arrival of Surly’s breakout Pugsley. Since those days of obsolete 150mm/100mm fatbike spacing and treadless tires, we have been slowly polishing our frame design and build spec.

The O’Beast is our flagship fatbike, equally suitable for touring, bikepacking, racing, and just going for a toot. Sliding dropouts afford the versatility to accept a wide variety of axle and dropout styles. While optimized around 4″ tires, the O’Beast can often accommodate slightly larger tires with a few adjustments. (Need more float? The Omega’Beast has ample clearance for all setups including 5+” tire.)

The O’Beast has been tested on virtually every surface on earth and promises a wildly comfortable ride. Made of 3/2.5 titanium, with a brushed finish and subtle bead blasted logos, it’s sure to turn some heads on the trail.

Is there a little detail you don’t like? Want to tweak the geometry a bit? Have a cool idea for a frame? As with all our titanium frames, customization is no problem. For an extra $300 we can edit this frame to your liking, or start completely from scratch. Contact us any time and let us know what you’re looking for. We can help you design a frame and give you an accurate timeline for how long it will take to build.



  • 3/2.5 seamless titanium
  • Brushed finish with subtle bead-blasted logo
  • 12 sizes from 14″ to 25″
  • 4.4 pounds in medium size
  • Clearance for 29 x 3, 27.5 x 4, and 26 x 4.5” tires
  • Rack/fender mounts
  • Two sets of triple bottle cage mounts (three on sizes 19″ and up)
  • ZS44/ZS56 tapered headtube
  • 31.6mm seatpost
  • 34.9mm seatpost clamp
  • Internal dropper post compatible
  • 177mm thru-axle or 170mm quick-release
  • Belt drive compatible
  • Sliding dropouts with 20mm of adjustment
  • 100mm threaded bottom bracket
  • Under-the-downtube cable routing with bolt-on cable clamps
  • 5-year warranty to original owner, lifetime crash replacement



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We build our Ti O’Beast frames in 1” increments all the way up to 24″. Just scroll to the right so see specs for our larger frames

Size 14 15 16 17 18 19 20 21 22 23 24
Seat Tube 14in 15in 16in 17in 18in 19in 20in 21in 22in 23in 24in
Effective TT 22in 22in 22.5in 23in 23.5in 24in 24.5in 25in 25.5in 26in 26.5in
Head Tube Length 105mm 105mm 110mm 110mm 120mm 120mm 135mm 135mm 135mm 135mm 135mm
BB Drop 55mm 55mm 55mm 55mm 55mm 55mm 55mm 55mm 55mm 55mm 55mm
Head Tube Angle 69° 69° 69° 69° 69° 69° 69° 69° 69° 69° 69°
Stack 594mm 594mm 599mm 599mm 608mm 608mm 622mm 622mm 622mm 622mm 622mm
Reach 378mm 378mm 388mm 402mm 411mm 424mm 432mm 445mm 455mm 470mm 483mm
Chainstay Length Sliding dropouts have a chainstay length range of 450mm—470mm
  • BB height is based on 26 x 4” tires and a wheel diameter of 770mm.
  • Geometry table is based on a 490mm axle-to-crown fork.