Soma Frame Jawbone B-Type Black
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769.95 769.95 769.95 USD


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The Jawbone B-Type frame is a versatile platform to build drop bar mountain touring and bike packing rig. While it is still game for riding some gravel and singletrack, it it is its element when loaded up for your next adventure.

- Tange Prestige heat-treated double butted CrMo steel; butted CrMo rear end
-IRD Broski Sliding Dropouts allows for running derailleurs as well as geared hubs like Rohloff. You can also convert it to single speed if your derailleur conks out on a ride.
(Stock dropout insert is for 135mm QR. 142 x 12mm Thru-Axle inserts available separately)
- IS mount disc brake tabs
- Front derailleur compatible (bottom pull)
- Rear rack and fender eyelets
- Two sets of bottle cage bosses; one set of cargo cage bosses on downtube
- 44mm headtube fit 1-1/8" steerer tubes and tapered steerer tubes with a headset swap (Run a ZS44 headset with the matching fork)
- 27.2mm post size/28.6mm frt. der. size/29.8mm seat collar, 73mm bottom bracket (English threads)
- Tire width range: 650b x 47mm to 27.5 x 2.6” / 700c x 38mm to 29 x 2.25” - Color: Slick Black
- Sizes: 650b only: 50cm, 52cm 700c: 54cm, 56cm, 58cm, 61cm, 64cm

Optional Fork Features
- Tange CrMo steel
- Fits QR hubs
- Axle to Crown: 420mm
- Rake: 50mm
- IS disc mounts, rotor fit up to 180mm
- Two sets of cargo cage bosses per leg, pannier rack bosses on inside and outside leg

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