Titanium O’Beast Frame

Dialed Fatbike Geometry in a Versatile, Classy Frame

Carver’s original production ti fat bike frame, and the most popular frame we’ve ever produced! The O’Beast now comes stock with sliding dropouts, giving it the versatility to accept a wide variety of axle and dropout styles. The O’Beast comes in a brushed (polished) finish with a bead blasted logo only and has rack mounts.

While optimized around 4″ tires, the O’Beast can accommodate 4.8″ tires with a few adjustments (see the FAQ section.) Typically we recommend the Omega’Beast which has ample clearance for all setups over 4.8″

  • 44mm Headtube
  • 34.9mm seatpost collar
  • 31.6mm seatpost
  • High direct mount front derailleur (not included)
  • 170mm spacing (177mm thru axle available with slider version)
  • 100mm bottom bracket shell
  • 3/2.5 Seamless Aerospace Ti
  • 12 sizes from 14″ to 23″
  • 6mm water cut dropouts
  • Rear Rack Mounts
  • Belt Drive Compatible (slider version only)

With Sliding Dropouts and Quick-Release $1,399.95

With Sliding Dropouts and Thru-Axle $1,449.95

With Pinion Cradle $1899.95 (lead time)

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Reviews & Press


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.


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.