2023 Soma Fabrications Jawbone A-Type Base

Design
Drop Bar, Rigid, non-suspension corrected
Frame
Steel
Fork
Steel
Features
Disc brake
Average stack and reachvs category
Average stack and reachvs category
Average stack and reachvs category
Average stack and reachvs category
Average stack and reachvs category
Somewhat upright stack and reachvs category
Somewhat upright stack and reachvs category
Somewhat upright stack and reachvs category
Average stack and reachvs category
Average stack and reachvs category
Average stack and reachvs category

Geometry

50cm
52cm
52
54cm
54
56
56cm
58cm
61cm
61cm
64cm
Stack
563mm
582mm
582mm
594mm
594mm
623mm
623mm
637mm
652mm
652mm
673mm
Reach
361mm
369mm
369mm
377mm
377mm
379mm
379mm
388mm
401mm
401mm
416mm
Stack to Reach Ratio
1.56:1
1.58:1
1.58:1
1.58:1
1.58:1
1.64:1
1.64:1
1.64:1
1.63:1
1.63:1
1.62:1
Seat Tube Length, C-T
420mm
450mm
450mm
515mm
515mm
525mm
525mm
545mm
580mm
580mm
625mm
Top Tube Length, Effective/Horizontal Center
—
—
539mm
—
553mm
569mm
—
—
—
—
—
Top Tube Length, Effective/Horizontal Unknown
—
—
—
—
—
—
—
—
—
600mm
—
Top Tube Length, Actual C-C
523mm
539mm
—
553mm
—
—
569mm
583mm
600mm
—
628mm
Top Tube Slope
18.5deg
16.9deg
16.9deg
10.8deg
10.8deg
12.8deg
12.8deg
12deg
9.7deg
9.7deg
7.3deg
Head Tube Angle
70deg
70.5deg
70.5deg
70.5deg
70.5deg
71deg
70.5deg
71deg
71.5deg
71.5deg
71.5deg
Seat Tube Angle
74deg
73.8deg
73.8deg
73.5deg
73.5deg
73deg
73deg
73deg
73deg
73deg
72.5deg
Head Tube Length
130mm
142mm
142mm
155mm
155mm
185mm
185mm
200mm
210mm
210mm
240mm
Bottom Bracket Drop
66mm
66mm
66mm
72mm
72mm
72mm
72mm
72mm
72mm
72mm
72mm
Bottom Bracket Height
281.9mm
281.9mm
292mm
294.9mm
286mm
286mm
294.9mm
294.9mm
294.9mm
294.9mm
294.9mm
Chainstay Length
445mm
445mm
445mm
445mm
445mm
445mm
445mm
445mm
445mm
445mm
445mm
Chainstay Length Horizontal
440.1mm
440.1mm
440.1mm
439.1mm
439.1mm
439.1mm
439.1mm
439.1mm
439.1mm
439.1mm
439.1mm
Front-Center
600mm
608mm
605.5mm
619mm
621.1mm
631mm
633mm
640mm
660mm
660mm
675mm
Front-Center Horizontal
595.9mm
601.9mm
601.9mm
616.9mm
616.9mm
626.9mm
626.9mm
634.9mm
648.9mm
648.9mm
672.9mm
Wheelbase
1036mm
1042mm
1042mm
1056mm
1056mm
1066mm
1066mm
1074mm
1088mm
1088mm
1112mm
Fork Offset/Rake
50mm
50mm
50mm
50mm
50mm
50mm
50mm
50mm
50mm
50mm
50mm
Fork Length (Axle-To-Crown)
420mm
420mm
—
420mm
—
—
420mm
420mm
420mm
420mm
420mm
Fork Length, Unknown
—
—
420mm
—
420mm
420mm
—
—
—
—
—
Trail
73.4mm
high
70.2mm
high
73.7mm
high
76.9mm
high
73.7mm
high
70.4mm
high
76.9mm
high
73.5mm
high
70mm
high
70mm
high
70mm
high
Mechanical Trail
69mm
66.1mm
69.5mm
72.5mm
69.5mm
66.6mm
72.5mm
69.4mm
66.4mm
66.4mm
66.4mm
Wheel Flop
23.6mm
22.1mm
23.2mm
24.2mm
23.2mm
21.7mm
24.2mm
22.6mm
21.1mm
21.1mm
21.1mm
Standover Height
738mm
758mm
758mm
804mm
804mm
827mm
827mm
844mm
864mm
864mm
890mm
Tire to Pedal Spindle
82.1mm
170 mm cranks
90.1mm
170 mm cranks
77.5mm
170 mm cranks
82.1mm
170 mm cranks
93.1mm
170 mm cranks
103mm
170 mm cranks
96.1mm
170 mm cranks
103.1mm
170 mm cranks
123.1mm
170 mm cranks
123.1mm
170 mm cranks
138.1mm
170 mm cranks
Pedal Spindle to Ground Clearance
111.9mm
170 mm cranks
111.9mm
170 mm cranks
122mm
170 mm cranks
124.9mm
170 mm cranks
116mm
170 mm cranks
116mm
170 mm cranks
124.9mm
170 mm cranks
124.9mm
170 mm cranks
124.9mm
170 mm cranks
124.9mm
170 mm cranks
124.9mm
170 mm cranks

Base Build

50cm
52cm
52
54cm
54
56
56cm
58cm
61cm
61cm
64cm
Wheel Size
650B/27.5 in
584 mm BSD
650B/27.5 in
584 mm BSD
700C/29 in
622 mm BSD
700C/29 in
622 mm BSD
700C/29 in
622 mm BSD
700C/29 in
622 mm BSD
700C/29 in
622 mm BSD
700C/29 in
622 mm BSD
700C/29 in
622 mm BSD
700C/29 in
622 mm BSD
700C/29 in
622 mm BSD
Tire Width
2.2in
2.2in
47mm
2.2in
47mm
47mm
2.2in
2.2in
2.2in
2.2in
2.2in
Tire Width Max
2.5in
2.5in
2.2in
2.3in
2.2in
2.2in
2.3in
2.3in
2.3in
—
2.3in
Tire Outer Diameter
695.8mm
695.8mm
716mm
733.8mm
716mm
716mm
733.8mm
733.8mm
733.8mm
733.8mm
733.8mm
Bike Length with Tires
1731.8mm
1737.8mm
1758mm
1789.8mm
1772mm
1782mm
1799.8mm
1807.8mm
1821.8mm
1821.8mm
1845.8mm

Stack and Reach vs. Category Trend

Very Upright
Somewhat Upright
Average
Somewhat Aggressive
Very Aggressive

The Bike Insights Upright/Aggressive scale is based on analysis of a bike’s proportions relative to similar sized bikes in the same category.

Learn more about the Upright/Aggressive Scale
Category Trend
Off-road Touring
Source:https://www.somafab.com/archives/product/jawbone-frame-a-type