Soma Jawbone B-Type Frame 54cm 29" - Black
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Soma Jawbone B-Type Frame 54cm 29" - Black

Soma Jawbone B-Type Frame 54cm 29" - Black

  • The Jawbone B-Type frame is the perfect platform to build drop bar mountain touring and bike packing rig
  • Tange Prestige heat-treated butted CrMo steel; butted CrMo rear end
  • IRD Broski Sliding Dropouts allows for running derailleurs as well as geared hubs like Rohloff (Stock dropout insert is for 135mm QR. 142 x 12mm Thru-Axle inserts available separately, SF4958, SF4959. SF4960-142x12mm axle )
  • IS mount disc brake tabs
  • Front derailleur compatible (bottom pull)
  • Headset for optional 1-1/8 inch matching fork: SHIS: ZS44/28.6 | ZS44/30. If running a tapered steerer fork, get an EC44 lower cup
  • Rear rack and fender eyelets
  • Two sets of bottle cage bosses; one set of cargo cage bosses on downtube
  • 44mm headtube: Fits 1-1/8 inch steerer tubes and tapered steerer tubes with a headset swap
  • 27.2mm post size/28.6mm frt. der. size/29.8mm seat collar, 73mm bottom bracket (English threads)
  • Tire Width Range: 27.5 x 47mm to 2.6” / 700c x 38mm to 29 x 2.25”
  • For matching fork please consider SF4030
    • TECH SPECS
    model Jawbone B-Type
    size 54cm
    seat tube (c-t) 490mm
    top tube (effective, c-c) 553mm
    chainstay 435-455mm
    head angle 70.5 deg
    seat angle 73.5 deg
    bottom bracket 73mm
    seatpost 27.2mm
    front derail 28.6mm
    wheel size 29"
    dropout 10x135mm QR
    color black
    $769.95
    Soma Jawbone B-Type Frame 54cm 29" - Black—
    $769.95

    Soma Jawbone B-Type Frame 54cm 29" - Black

  • The Jawbone B-Type frame is the perfect platform to build drop bar mountain touring and bike packing rig
  • Tange Prestige heat-treated butted CrMo steel; butted CrMo rear end
  • IRD Broski Sliding Dropouts allows for running derailleurs as well as geared hubs like Rohloff (Stock dropout insert is for 135mm QR. 142 x 12mm Thru-Axle inserts available separately, SF4958, SF4959. SF4960-142x12mm axle )
  • IS mount disc brake tabs
  • Front derailleur compatible (bottom pull)
  • Headset for optional 1-1/8 inch matching fork: SHIS: ZS44/28.6 | ZS44/30. If running a tapered steerer fork, get an EC44 lower cup
  • Rear rack and fender eyelets
  • Two sets of bottle cage bosses; one set of cargo cage bosses on downtube
  • 44mm headtube: Fits 1-1/8 inch steerer tubes and tapered steerer tubes with a headset swap
  • 27.2mm post size/28.6mm frt. der. size/29.8mm seat collar, 73mm bottom bracket (English threads)
  • Tire Width Range: 27.5 x 47mm to 2.6” / 700c x 38mm to 29 x 2.25”
  • For matching fork please consider SF4030
    • TECH SPECS
    model Jawbone B-Type
    size 54cm
    seat tube (c-t) 490mm
    top tube (effective, c-c) 553mm
    chainstay 435-455mm
    head angle 70.5 deg
    seat angle 73.5 deg
    bottom bracket 73mm
    seatpost 27.2mm
    front derail 28.6mm
    wheel size 29"
    dropout 10x135mm QR
    color black

    Product Information

    Shipping & Returns

    Description

  • The Jawbone B-Type frame is the perfect platform to build drop bar mountain touring and bike packing rig
  • Tange Prestige heat-treated butted CrMo steel; butted CrMo rear end
  • IRD Broski Sliding Dropouts allows for running derailleurs as well as geared hubs like Rohloff (Stock dropout insert is for 135mm QR. 142 x 12mm Thru-Axle inserts available separately, SF4958, SF4959. SF4960-142x12mm axle )
  • IS mount disc brake tabs
  • Front derailleur compatible (bottom pull)
  • Headset for optional 1-1/8 inch matching fork: SHIS: ZS44/28.6 | ZS44/30. If running a tapered steerer fork, get an EC44 lower cup
  • Rear rack and fender eyelets
  • Two sets of bottle cage bosses; one set of cargo cage bosses on downtube
  • 44mm headtube: Fits 1-1/8 inch steerer tubes and tapered steerer tubes with a headset swap
  • 27.2mm post size/28.6mm frt. der. size/29.8mm seat collar, 73mm bottom bracket (English threads)
  • Tire Width Range: 27.5 x 47mm to 2.6” / 700c x 38mm to 29 x 2.25”
  • For matching fork please consider SF4030
    • TECH SPECS
    model Jawbone B-Type
    size 54cm
    seat tube (c-t) 490mm
    top tube (effective, c-c) 553mm
    chainstay 435-455mm
    head angle 70.5 deg
    seat angle 73.5 deg
    bottom bracket 73mm
    seatpost 27.2mm
    front derail 28.6mm
    wheel size 29"
    dropout 10x135mm QR
    color black

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