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





Can I run bigger tires than 4.7″?

With a sacrifice or two, you probably can! The easiest way to allow for additional tire clearance is to go with a 1x setup in the front. The more outboard chainline will keep your chain from rubbing on the tire, allowing for a wider tire. Another way to help is by truncating your cassette. This is the act of removing cogs from the cassette, and replacing them with an equal amount of spacers behind the cassette. This also brings your chainline more outboard and increases the distance between tire and chain.

Can I use a Bluto on this frame?

Sure! It will slacken your angles by a bit, but that’s usually not a bad thing. Keep in mind that not all sizes have clearance for the compression adjustment knob, so a conversion crown race piece will be included.

Where To Buy




Find a Dealer


Contact Carver

Reviews & Press

Outdoor Gear Lab



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 Height 315mm 315mm 315mm 315mm 315mm 315mm 315mm 315mm 315mm 315mm 315mm
Head Tube Angle 69° 69° 69.5° 70° 70° 70° 70° 70° 70° 70° 70°
Stack 570.8mm 570.8mm 577.7mm 579.8mm 589.2mm 589.2mm 603.3mm 603.3mm 603.3mm 603.3mm 603.3mm
Reach 384.6mm 384.6mm 394.9mm 407.5mm 416.8mm 429.9mm 437.9mm 450.6mm 460.6mm 457.6mm 488.7mm
Standover 27.6in 27.9in 28.1in 28.4in 29in 29.5in 30.2in 30.2in 31.2in 31.8in 32.5in
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 465mm axle-to-crown fork.