2020 Surly Bikes Karate Monkey 27.5+ Rigid Fork

	XS	SM	MD	LG	XL
Stack	597mm	597mm	597mm	606mm	615mm
Reach	377mm	402mm	427mm	450mm	472mm
Stack to Reach Ratio	1.58:1	1.49:1	1.4:1	1.35:1	1.3:1
Seat Tube Length, C-T	330mm	368mm	419mm	470mm	521mm
Top Tube Length, Effective/Horizontal HT Top	560mm	585mm	610mm	635mm	660mm
Top Tube Length, Actual C-C	549.7mm	560.4mm	575mm	597.5mm	624.5mm
Top Tube Slope	30.7deg	25.7deg	19.7deg	14.9deg	10.6deg
Head Tube Angle	69deg	69deg	69deg	69deg	69deg
Seat Tube Angle	73deg	73deg	73deg	73deg	73deg
Head Tube Length	100mm	100mm	100mm	110mm	120mm
Bottom Bracket Drop	55mm	55mm	55mm	55mm	55mm
Bottom Bracket Height	313.2mm	313.2mm	313.2mm	313.2mm	313.2mm
Chainstay Length	423mm	423mm	423mm	423mm	423mm
Chainstay Length Horizontal	419.4mm	419.4mm	419.4mm	419.4mm	419.4mm
Front-Center	636mm	660.9mm	685.8mm	711.7mm	737.6mm
Front-Center Horizontal	633.6mm	658.6mm	683.6mm	709.6mm	735.6mm
Wheelbase	1053mm	1078mm	1103mm	1129mm	1155mm
Fork Offset/Rake	47mm	47mm	47mm	47mm	47mm
Fork Length (Axle-To-Crown)	483mm	483mm	483mm	483mm	483mm
Trail	91mm very high	91mm very high	91mm very high	91mm very high	91mm very high
Mechanical Trail	85mm	85mm	85mm	85mm	85mm
Wheel Flop	30.4mm	30.4mm	30.4mm	30.4mm	30.4mm
Standover Height	743mm	759mm	783mm	812mm	827mm
Tire to Pedal Spindle	97.8mm 170 mm cranks	122.7mm 170 mm cranks	147.6mm 170 mm cranks	173.5mm 170 mm cranks	199.4mm 170 mm cranks
Pedal Spindle to Ground Clearance	143.2mm 170 mm cranks	143.2mm 170 mm cranks	143.2mm 170 mm cranks	143.2mm 170 mm cranks	143.2mm 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/karate_monkey

Geometry