2025 Surly Bikes Moonlander Pinion

	SM	MD	LG	XL
Stack	578.4mm	606.3mm	624.9mm	643.5mm
Reach	398.2mm	419.6mm	443.9mm	468.2mm
Stack to Reach Ratio	1.45:1	1.44:1	1.41:1	1.37:1
Seat Tube Length, C-T	368mm	419mm	480mm	521mm
Top Tube Length, Effective/Horizontal HT Top	575mm	605mm	635mm	665mm
Top Tube Slope	24.1deg	20.8deg	15.9deg	13.2deg
Head Tube Angle	68.5deg	68.5deg	68.5deg	68.5deg
Seat Tube Angle	73deg	73deg	73deg	73deg
Head Tube Length	120mm	150mm	170mm	190mm
Bottom Bracket Drop	45mm	45mm	45mm	45mm
Bottom Bracket Height	366mm	366mm	366mm	366mm
Chainstay Length	561.8mm	561.8mm	561.8mm	561.8mm
Chainstay Length Horizontal	560mm	560mm	560mm	560mm
Front-Center	657mm	689.4mm	720.9mm	752.6mm
Front-Center Horizontal	655.4mm	687.9mm	719.5mm	751.2mm
Wheelbase	1215.4mm	1247.9mm	1279.5mm	1311.2mm
Fork Offset/Rake	50mm	50mm	50mm	50mm
Fork Length (Axle-To-Crown)	460mm	460mm	460mm	460mm
Trail	108.2mm very high	108.2mm very high	108.2mm very high	108.2mm very high
Mechanical Trail	100.6mm	100.6mm	100.6mm	100.6mm
Wheel Flop	36.9mm	36.9mm	36.9mm	36.9mm
Standover Height	736mm	769mm	793mm	801mm
Tire to Pedal Spindle	76mm 170 mm cranks	108.4mm 170 mm cranks	139.9mm 170 mm cranks	171.6mm 170 mm cranks
Pedal Spindle to Ground Clearance	196mm 170 mm cranks	196mm 170 mm cranks	196mm 170 mm cranks	196mm 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.

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Source:https://surlybikes.com/bikes/moonlander-v2

Geometry