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| model | Jawbone B-Type |
| size | 58cm |
| seat tube (c-t) | 545mm |
| top tube (effective, c-c) | 583mm |
| chainstay | 435-455mm |
| head angle | 71 deg |
| seat angle | 73 deg |
| bottom bracket | 73mm |
| seatpost | 27.2mm |
| front derail | 28.6mm |
| wheel size | 29" |
| dropout | 10x135mm QR |
| color | black |
