2025 Serk Titanium A40 Base
- Category
- All-road/Gravel
- Design
- Drop Bar, Rigid, non-suspension corrected
- Frame
- Titanium
- Fork
- Carbon/Composite
Geometry
XS | S | M | L | XL | XXL | |
Stack | 519mm | 548mm | 567mm | 590mm | 613mm | 638mm |
Reach | 366mm | 374mm | 382mm | 390mm | 398mm | 406mm |
Stack to Reach Ratio | 1.42:1 | 1.47:1 | 1.48:1 | 1.51:1 | 1.54:1 | 1.57:1 |
Seat Tube Length, Unknown | 435mm | 495mm | 515mm | 535mm | 560mm | 585mm |
Top Tube Length, Effective/Horizontal Unknown | 505mm | 526mm | 545mm | 565mm | 580mm | 601mm |
Top Tube Slope | 11.7deg | 8deg | 7.8deg | 8.1deg | 7.8deg | 7.8deg |
Head Tube Angle | 71deg | 71.5deg | 71.5deg | 71.5deg | 71.5deg | 71.5deg |
Seat Tube Angle | 75deg | 74.5deg | 74deg | 73.5deg | 73.5deg | 73deg |
Head Tube Length | 90mm | 121mm | 141mm | 168mm | 192mm | 218mm |
Bottom Bracket Drop | 77mm | 75mm | 75mm | 73mm | 73mm | 73mm |
Bottom Bracket Height | 274mm | 276mm | 276mm | 278mm | 278mm | 278mm |
Chainstay Length | 420mm | 420mm | 420mm | 420mm | 420mm | 420mm |
Chainstay Length Horizontal | 412.9mm | 413.3mm | 413.3mm | 413.6mm | 413.6mm | 413.6mm |
Front-Center | 573.3mm | 586.6mm | 600.5mm | 616.7mm | 632.6mm | 648.5mm |
Front-Center Horizontal | 568.1mm | 581.8mm | 595.8mm | 612.4mm | 628.4mm | 644.4mm |
Wheelbase | 981mm | 995mm | 1009mm | 1026mm | 1042mm | 1058mm |
Fork Offset/Rake | 47mm | 47mm | 47mm | 47mm | 47mm | 47mm |
Trail | 71.2mm high | 67.9mm high | 67.9mm high | 67.9mm high | 67.9mm high | 67.9mm high |
Mechanical Trail | 67.3mm | 64.4mm | 64.4mm | 64.4mm | 64.4mm | 64.4mm |
Wheel Flop | 21.9mm | 20.4mm | 20.4mm | 20.4mm | 20.4mm | 20.4mm |
Standover Height | 722mm | 767mm | 785mm | 808mm | 831mm | 855mm |
Tire to Pedal Spindle | 52.3mm 170 mm cranks | 65.6mm 170 mm cranks | 79.5mm 170 mm cranks | 95.7mm 170 mm cranks | 111.6mm 170 mm cranks | 127.5mm 170 mm cranks |
Pedal Spindle to Ground Clearance | 104mm 170 mm cranks | 106mm 170 mm cranks | 106mm 170 mm cranks | 108mm 170 mm cranks | 108mm 170 mm cranks | 108mm 170 mm cranks |
Base Build
XS | S | M | L | XL | XXL | |
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 Outer Diameter | 702mm | 702mm | 702mm | 702mm | 702mm | 702mm |
Bike Length with Tires | 1683mm | 1697mm | 1711mm | 1728mm | 1744mm | 1760mm |
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:SERK.CC