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$769.95
Soma Jawbone B-Type Frame 54cm 29" - Black—
$769.95
The Story
- 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”
- For matching fork please consider SF4030
| Model | Jawbone B-Type |
| Size | 54cm |
| Seat Tube (C | T)-490mm |
| C | C)-553mm |
| Chainstay | 435-455mm |
| Head Angle | 70.5 Deg |
| Seat Angle | 73.5 Deg |
| Bottom Bracket | 73mm |
| Seatpost | 27.2mm |
| Front Derail | 28.6mm |
| Wheel Size | 29" |
| Dropout | 10x135mm QR |
| Color | Black |
Description
- 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”
- For matching fork please consider SF4030
| Model | Jawbone B-Type |
| Size | 54cm |
| Seat Tube (C | T)-490mm |
| C | C)-553mm |
| Chainstay | 435-455mm |
| Head Angle | 70.5 Deg |
| Seat Angle | 73.5 Deg |
| Bottom Bracket | 73mm |
| Seatpost | 27.2mm |
| Front Derail | 28.6mm |
| Wheel Size | 29" |
| Dropout | 10x135mm QR |
| Color | Black |
