2025 Sombra Grus Base

	XS	S	M	L	XL
Stack	542mm	556mm	576mm	599mm	618mm
Reach	372mm	381mm	397mm	403mm	410mm
Stack to Reach Ratio	1.46:1	1.46:1	1.45:1	1.49:1	1.51:1
Seat Tube Length, C-T	485mm	500mm	525mm	545mm	565mm
Top Tube Length, Effective/Horizontal Unknown	525mm	538mm	559mm	575mm	588mm
Top Tube Slope	8.5deg	8.2deg	7.4deg	7.7deg	7.5deg
Head Tube Angle	69.5deg	69.5deg	71deg	72deg	72deg
Seat Tube Angle	74.5deg	74.5deg	74.5deg	74.5deg	74.5deg
Head Tube Length	110mm	125mm	140mm	160mm	180mm
Bottom Bracket Drop	72mm	72mm	72mm	72mm	72mm
Bottom Bracket Height	289mm	289mm	289mm	289mm	289mm
Chainstay Length	430mm	430mm	430mm	430mm	430mm
Chainstay Length Horizontal	423.9mm	423.9mm	423.9mm	423.9mm	423.9mm
Front-Center	602.4mm	616.3mm	625.2mm	628.2mm	641.1mm
Front-Center Horizontal	598.1mm	612.1mm	621.1mm	624.1mm	637.1mm
Wheelbase	1022mm	1036mm	1045mm	1048mm	1061mm
Wheelbase Max	1026mm	1040mm	1049mm	1052mm	1065mm
Fork Offset/Rake	52mm	52mm	52mm	52mm	52mm
Fork Length, Unknown	398mm	398mm	398mm	398mm	398mm
Trail	79.5mm high	79.5mm high	69.3mm high	62.6mm mid/neutral	62.6mm mid/neutral
Mechanical Trail	74.4mm	74.4mm	65.5mm	59.6mm	59.6mm
Wheel Flop	26.1mm	26.1mm	21.3mm	18.4mm	18.4mm
Standover Height	773mm	787mm	809mm	830mm	850mm
Tire to Pedal Spindle	71.4mm 170 mm cranks	85.3mm 170 mm cranks	94.2mm 170 mm cranks	97.2mm 170 mm cranks	110.1mm 170 mm cranks
Pedal Spindle to Ground Clearance	119mm 170 mm cranks	119mm 170 mm cranks	119mm 170 mm cranks	119mm 170 mm cranks	119mm 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://sombracycles.com/product/grus-25-gravel-moonsoon-mist-blue/

Geometry