Soma Jawbone Frame B-Type

The Jawbone B-Type frame is the perfect platform to build drop bar mountain touring and bike packing rig Tange Prestige heattreated 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 ThruAxle inserts available separately, SF4958, SF4959. SF4960-142x12mm axle ) IS mount disc brake tabs Front derailleur compatible (bottom pull) Headset for optional 11/8" 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 11/8" 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” For matching fork please consider SF4030