2026 Principia Gravel H10/H20 (Lady) Base

	43cm	48cm	53cm
Stack	570mm	598.8mm	596mm
Reach	397.5mm	391mm	399.7mm
Stack to Reach Ratio	1.43:1	1.53:1	1.49:1
Seat Tube Length, C-T	432mm	483mm	533mm
Top Tube Length, Effective/Horizontal Center	557mm	557mm	565mm
Top Tube Slope	16.7deg	14.4deg	8.6deg
Head Tube Angle	71deg	71deg	71.5deg
Seat Tube Angle	74.5deg	74.5deg	74.5deg
Head Tube Length	135mm	155mm	155mm
Bottom Bracket Drop	65mm	65mm	65mm
Bottom Bracket Height	291mm	291mm	291mm
Chainstay Length	439mm	439mm	439mm
Chainstay Length Horizontal	434.2mm	434.2mm	434.2mm
Front-Center	623.9mm	633.7mm	628.2mm
Front-Center Horizontal	615.9mm	626.3mm	624.8mm
Wheelbase	1050.1mm	1060.5mm	1059mm
Fork Offset/Rake	45mm	45mm	45mm
Fork Length, Unknown	425mm	425mm	425mm
Trail	75mm high	75mm high	71.7mm high
Mechanical Trail	70.9mm	70.9mm	68mm
Wheel Flop	23.1mm	23.1mm	21.6mm
Tire to Pedal Spindle	97.9mm 170 mm cranks	107.7mm 170 mm cranks	102.2mm 170 mm cranks
Pedal Spindle to Ground Clearance	121mm 170 mm cranks	121mm 170 mm cranks	121mm 170 mm cranks

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.

Category Trend

Source:https://principiabikes.com/gravel/gravel-hybrid/gravel-h10---copper-pg-2604

Geometry