2026 Seaboard GR04 Base
- Category
- All-road/Gravel
- Design
- Drop Bar, Rigid, non-suspension corrected
Geometry
44cm | 47cm | 50cm | 53cm | 56cm | 59cm | |
Stack | 533mm | 551mm | 567.1mm | 583mm | 597mm | 611.8mm |
Reach | 365mm | 373.5mm | 380mm | 390mm | 398mm | 404.5mm |
Stack to Reach Ratio | 1.46:1 | 1.48:1 | 1.49:1 | 1.49:1 | 1.5:1 | 1.51:1 |
Seat Tube Length, C-T | 440mm | 470mm | 500mm | 530mm | 560mm | 590mm |
Top Tube Length, Effective/Horizontal HT Top | 513mm | 526.5mm | 542.6mm | 558.5mm | 570mm | 580mm |
Top Tube Slope | 12.7deg | 11.1deg | 9.4deg | 7.8deg | 6.1deg | 4.5deg |
Head Tube Angle | 70deg | 71deg | 71.5deg | 72deg | 72deg | 72deg |
Seat Tube Angle | 74.5deg | 74.5deg | 74.5deg | 74deg | 74deg | 74deg |
Head Tube Length | 115mm | 130mm | 145mm | 160mm | 175mm | 190mm |
Bottom Bracket Drop | 70mm | 70mm | 70mm | 70mm | 70mm | 70mm |
Bottom Bracket Height | 281mm | 281mm | 281mm | 281mm | 281mm | 281mm |
Chainstay Length | 425mm | 425mm | 425mm | 425mm | 425mm | 425mm |
Chainstay Length Horizontal | 419.2mm | 419.2mm | 419.2mm | 419.2mm | 419.2mm | 419.2mm |
Front-Center | 591mm | 596mm | 603mm | 614mm | 625.7mm | 637.1mm |
Front-Center Horizontal | 586.8mm | 591.9mm | 598.9mm | 610mm | 621.8mm | 633.2mm |
Wheelbase | 1006mm | 1011.1mm | 1018.1mm | 1029.2mm | 1041mm | 1052.4mm |
Fork Offset/Rake | 45mm | 45mm | 45mm | 45mm | 45mm | 45mm |
Trail | 79.9mm high | 73.3mm high | 70mm high | 66.7mm high | 66.7mm high | 66.7mm high |
Mechanical Trail | 75.1mm | 69.3mm | 66.4mm | 63.5mm | 63.5mm | 63.5mm |
Wheel Flop | 25.7mm | 22.6mm | 21.1mm | 19.6mm | 19.6mm | 19.6mm |
Tire to Pedal Spindle | 70mm 170 mm cranks | 75mm 170 mm cranks | 82mm 170 mm cranks | 93mm 170 mm cranks | 104.7mm 170 mm cranks | 116.1mm 170 mm cranks |
Pedal Spindle to Ground Clearance | 111mm 170 mm cranks | 111mm 170 mm cranks | 111mm 170 mm cranks | 111mm 170 mm cranks | 111mm 170 mm cranks | 111mm 170 mm cranks |
Base Build
44cm | 47cm | 50cm | 53cm | 56cm | 59cm | |
Wheel Size | 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 | 40mm | 40mm | 40mm | 40mm | 40mm | 40mm |
Tire Width Max | 45mm | 45mm | 45mm | 45mm | 45mm | 45mm |
Tire Outer Diameter | 702mm | 702mm | 702mm | 702mm | 702mm | 702mm |
Bike Length with Tires | 1708mm | 1713.1mm | 1720.1mm | 1731.2mm | 1743mm | 1754.4mm |
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
All-road/GravelSource:https://www.amazon.de/ZFF001/dp/B0G4GVXRP1?th=1