Soma Fabrications
Jawbone B-Type Frame

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$769⁰⁰

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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" 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" 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”

Specifications

Brake Type

Disc

Fork Included?

Frame Material

Tange Prestige CrMo

Rear Axle

12mm Thru x 142mm, QR x 135mm

Rear Travel

Hardtail

Wheel Size

29", 650b

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