2021 Soma Fabrications Double Cross Disc 650b
- Category
- Cyclocross
- Design
- Drop Bar, Rigid, non-suspension corrected
- Frame
- Steel
- Fork
- Steel
- Features
- Disc brake
Somewhat upright 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 | Somewhat upright stack and reachvs category | Somewhat upright stack and reachvs category | Somewhat upright stack and reachvs category | Somewhat upright stack and reachvs category | Somewhat upright stack and reachvs category |
Geometry
42 | 46 | 50 | 52 | 54 | 56 | 58 | 60 | 62 | 66 | |
Stack | 548mm | 557mm | 567mm | 577mm | 592mm | 607mm | 624mm | 635mm | 640mm | 669mm |
Reach | 370mm | 376mm | 377mm | 377mm | 379mm | 384mm | 395mm | 402mm | 410mm | 416mm |
Stack to Reach Ratio | 1.48:1 | 1.48:1 | 1.5:1 | 1.53:1 | 1.56:1 | 1.58:1 | 1.58:1 | 1.58:1 | 1.56:1 | 1.61:1 |
Seat Tube Length, C-T | 420mm | 460mm | 500mm | 520mm | 540mm | 560mm | 580mm | 600mm | 620mm | 660mm |
Top Tube Length, Effective/Horizontal Center | 516mm | 526mm | 540mm | 550mm | 560mm | 570mm | 585mm | 601mm | 612mm | 627mm |
Top Tube Slope | 16.6deg | 12.8deg | 9.5deg | 8.5deg | 8deg | 7.4deg | 7.1deg | 6.2deg | 4.7deg | 3.7deg |
Head Tube Angle | 71deg | 71deg | 71deg | 71.5deg | 71.5deg | 71.5deg | 71.5deg | 71.5deg | 71.5deg | 71.5deg |
Seat Tube Angle | 75deg | 75deg | 74deg | 73.5deg | 73deg | 73deg | 72.5deg | 72.5deg | 72.5deg | 72.5deg |
Head Tube Length | 110mm | 120mm | 130mm | 140mm | 155mm | 170mm | 185mm | 200mm | 210mm | 240mm |
Bottom Bracket Drop | 70mm | 70mm | 70mm | 70mm | 70mm | 70mm | 70mm | 66mm | 66mm | 66mm |
Bottom Bracket Height | 273mm | 273mm | 273mm | 273mm | 273mm | 273mm | 273mm | 277mm | 277mm | 277mm |
Chainstay Length | 425mm | 425mm | 425mm | 425mm | 425mm | 425mm | 425mm | 425mm | 425mm | 425mm |
Chainstay Length Horizontal | 419.2mm | 419.2mm | 419.2mm | 419.2mm | 419.2mm | 419.2mm | 419.2mm | 419.8mm | 419.8mm | 419.8mm |
Front-Center | 585mm | 596mm | 599mm | 599mm | 604mm | 614mm | 624mm | 640mm | 652mm | 667mm |
Front-Center Horizontal | 580.8mm | 588.8mm | 593.8mm | 594.8mm | 599.8mm | 609.8mm | 619.8mm | 635.2mm | 648.2mm | 664.2mm |
Wheelbase | 1000mm | 1008mm | 1013mm | 1014mm | 1019mm | 1029mm | 1039mm | 1055mm | 1068mm | 1084mm |
Fork Offset/Rake | 44mm | 44mm | 44mm | 44mm | 44mm | 44mm | 44mm | 44mm | 44mm | 44mm |
Trail | 71.6mm high | 71.6mm high | 71.6mm high | 68.4mm high | 68.4mm high | 68.4mm high | 68.4mm high | 68.4mm high | 68.4mm high | 68.4mm high |
Mechanical Trail | 67.7mm | 67.7mm | 67.7mm | 64.8mm | 64.8mm | 64.8mm | 64.8mm | 64.8mm | 64.8mm | 64.8mm |
Wheel Flop | 22mm | 22mm | 22mm | 20.6mm | 20.6mm | 20.6mm | 20.6mm | 20.6mm | 20.6mm | 20.6mm |
Standover Height | 729mm | 746.8mm | 772.2mm | 784.9mm | 802.6mm | 820.4mm | 835.7mm | 853.4mm | 868.7mm | 889mm |
Tire to Pedal Spindle | 72mm 170 mm cranks | 83mm 170 mm cranks | 86mm 170 mm cranks | 86mm 170 mm cranks | 91mm 170 mm cranks | 101mm 170 mm cranks | 111mm 170 mm cranks | 127mm 170 mm cranks | 139mm 170 mm cranks | 154mm 170 mm cranks |
Pedal Spindle to Ground Clearance | 103mm 170 mm cranks | 103mm 170 mm cranks | 103mm 170 mm cranks | 103mm 170 mm cranks | 103mm 170 mm cranks | 103mm 170 mm cranks | 103mm 170 mm cranks | 107mm 170 mm cranks | 107mm 170 mm cranks | 107mm 170 mm cranks |
Disc 650b Build
42 | 46 | 50 | 52 | 54 | 56 | 58 | 60 | 62 | 66 | |
Wheel Size | 650B/27.5 in 584 mm BSD | 650B/27.5 in 584 mm BSD | 650B/27.5 in 584 mm BSD | 650B/27.5 in 584 mm BSD | 650B/27.5 in 584 mm BSD | 650B/27.5 in 584 mm BSD | 650B/27.5 in 584 mm BSD | 650B/27.5 in 584 mm BSD | 650B/27.5 in 584 mm BSD | 650B/27.5 in 584 mm BSD |
Tire Width | 47mm | 47mm | 47mm | 47mm | 47mm | 47mm | 47mm | 47mm | 47mm | 47mm |
Tire Width Max | 47mm | 47mm | 47mm | 47mm | 47mm | 47mm | 47mm | 47mm | 47mm | 47mm |
Tire Outer Diameter | 686mm | 686mm | 686mm | 686mm | 686mm | 686mm | 686mm | 686mm | 686mm | 686mm |
Bike Length with Tires | 1686mm | 1694mm | 1699mm | 1700mm | 1705mm | 1715mm | 1725mm | 1741mm | 1754mm | 1770mm |
Published Sizing Recommendations
Height | 150 cm to 160 cm | 157 cm to 168 cm | 165 cm to 173 cm | 170 cm to 178 cm | 173 cm to 180 cm | 178 cm to 185 cm | 180 cm to 188 cm | 180 cm to 188 cm | 191 cm to 198 cm | 196 cm to 205 cm |
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 ScaleCategory Trend
CyclocrossSource:https://www.somafab.com/archives/product/double-cross-disc, http://www.somafab.com/archives/product/double-cross-disc