2023 Principia Gravel H10, H20, 10, 20 Base

	45cm	50cm	55cm	61cm
Stack	565.7mm	588.6mm	590.6mm	653.8mm
Reach	400.1mm	401.8mm	406.2mm	413.7mm
Stack to Reach Ratio	1.41:1	1.47:1	1.45:1	1.58:1
Seat Tube Length, Unknown	450mm	500mm	550mm	610mm
Top Tube Length, Actual C-C	557mm	565mm	570mm	595mm
Top Tube Slope	14.2deg	11.3deg	6.3deg	6.5deg
Head Tube Angle	70deg	71deg	71.5deg	73deg
Seat Tube Angle	74.5deg	74.5deg	74.5deg	74.5deg
Head Tube Length	135mm	155mm	155mm	155mm
Bottom Bracket Drop	65mm	65mm	65mm	65mm
Bottom Bracket Height	284mm	284mm	284mm	284mm
Chainstay Length	435mm	435mm	435mm	435mm
Chainstay Length Horizontal	430.1mm	430.1mm	430.1mm	430.1mm
Front-Center	638.9mm	638.3mm	638.1mm	649.3mm
Front-Center Horizontal	635.6mm	634.9mm	634.8mm	646mm
Wheelbase	1065.7mm	1065.1mm	1064.9mm	1076.1mm
Fork Offset/Rake	50mm	50mm	50mm	50mm
Trail	73.8mm high	67.3mm high	64mm mid/neutral	54.4mm mid/neutral
Mechanical Trail	69.4mm	63.6mm	60.7mm	52mm
Wheel Flop	23.7mm	20.7mm	19.3mm	15.2mm
Standover Height	717.3mm	762.4mm	800.7mm	861.5mm
Tire to Pedal Spindle	119.9mm 170 mm cranks	119.3mm 170 mm cranks	119.1mm 170 mm cranks	130.3mm 170 mm cranks
Pedal Spindle to Ground Clearance	114mm 170 mm cranks	114mm 170 mm cranks	114mm 170 mm cranks	114mm 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://principia.dk/gravel/gravel-alu

Geometry