2026 Speedclan STIFFAF II Base
- Category
- Performance Road
- Design
- Drop Bar, Rigid, non-suspension corrected
- Frame
- Aluminum
- Fork
- Carbon/Composite
- Features
- Disc brake
Geometry
XS | S | M | L | |
Stack | 546mm | 555mm | 566mm | 583mm |
Reach | 380mm | 384mm | 388mm | 390mm |
Stack to Reach Ratio | 1.44:1 | 1.45:1 | 1.46:1 | 1.49:1 |
Seat Tube Length, Unknown | 490mm | 500mm | 530mm | 550mm |
Top Tube Length, Effective/Horizontal Unknown | 516mm | 529mm | 550mm | 562mm |
Top Tube Slope | 8.1deg | 8deg | 6deg | 5.9deg |
Head Tube Angle | 72deg | 73deg | 73deg | 74deg |
Seat Tube Angle | 76deg | 75deg | 74deg | 73deg |
Head Tube Length | 125mm | 133mm | 145mm | 160mm |
Bottom Bracket Drop | 73mm | 73mm | 73mm | 73mm |
Bottom Bracket Height | 266mm | 266mm | 266mm | 266mm |
Chainstay Length | 410mm | 410mm | 410mm | 410mm |
Chainstay Length Horizontal | 403.5mm | 403.5mm | 403.5mm | 403.5mm |
Front-Center | 580.2mm | 585.1mm | 590.1mm | 592.1mm |
Front-Center Horizontal | 575.6mm | 580.6mm | 585.6mm | 587.6mm |
Wheelbase | 979mm | 984mm | 989mm | 991mm |
Fork Offset/Rake | 45mm | 45mm | 45mm | 45mm |
Trail | 62.8mm mid/neutral | 56.6mm mid/neutral | 56.6mm mid/neutral | 50.4mm mid/neutral |
Mechanical Trail | 59.8mm | 54.1mm | 54.1mm | 48.4mm |
Wheel Flop | 18.5mm | 15.8mm | 15.8mm | 13.4mm |
Standover Height | 740mm | 760mm | 782mm | 790mm |
Tire to Pedal Spindle | 71.2mm 170 mm cranks | 76.1mm 170 mm cranks | 81.1mm 170 mm cranks | 83.1mm 170 mm cranks |
Pedal Spindle to Ground Clearance | 96mm 170 mm cranks | 96mm 170 mm cranks | 96mm 170 mm cranks | 96mm 170 mm cranks |
Base Build
XS | S | M | L | |
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 |
Tire Width | 28mm | 28mm | 28mm | 28mm |
Tire Width Max | 35mm | 35mm | 35mm | 35mm |
Tire Outer Diameter | 678mm | 678mm | 678mm | 678mm |
Bike Length with Tires | 1657mm | 1662mm | 1667mm | 1669mm |
Published Sizing Recommendations
PBH | 160 cm to 170 cm | 165 cm to 175 cm | 170 cm to 180 cm | 175 cm to 175 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
Performance RoadSource:speedclan.cc