Soma Fabrications

Jawbone A-Type Frame

The Jawbone A-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
• Flat mount disc brake tabs on rear
• Investment cast vertical dropout with replaceable stainless steel hanger. 12 x 142mm thru-axle
• 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 2.5" / 700c x 38mm to 29 x 2.25"