2024 Surly Bikes Big Easy Base

	SM	MD	LG
Stack	553.3mm	595mm	636.7mm
Reach	395.6mm	422.4mm	449.2mm
Stack to Reach Ratio	1.4:1	1.41:1	1.42:1
Seat Tube Length, Unknown	410mm	450mm	500mm
Top Tube Length, Effective/Horizontal HT Top	570mm	610mm	650mm
Top Tube Slope	17.4deg	16.6deg	14.9deg
Head Tube Angle	68deg	68deg	68deg
Seat Tube Angle	72.5deg	72.5deg	72.5deg
Head Tube Length	130mm	175mm	220mm
Bottom Bracket Drop	50mm	50mm	50mm
Bottom Bracket Height	293mm	293mm	293mm
Chainstay Length	830mm	830mm	830mm
Chainstay Length Horizontal	828.5mm	828.5mm	828.5mm
Front-Center	654.7mm	698.3mm	741.9mm
Front-Center Horizontal	652.8mm	696.5mm	740.2mm
Wheelbase	1481.3mm	1525mm	1568.7mm
Fork Offset/Rake	50mm	50mm	50mm
Fork Length (On-Axis)	420mm	420mm	420mm
Trail	84.7mm very high	84.7mm very high	84.7mm very high
Mechanical Trail	78.5mm	78.5mm	78.5mm
Wheel Flop	29.4mm	29.4mm	29.4mm
Standover Height	693mm	720mm	748mm
Tire to Pedal Spindle	141.7mm 170 mm cranks	180.3mm 175 mm cranks	223.9mm 175 mm cranks
Pedal Spindle to Ground Clearance	123mm 170 mm cranks	118mm 175 mm cranks	118mm 175 mm cranks

Published Sizing Recommendations

Height

11 ft 8 in

13 ft 1 in

14 ft 2 in

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/big_easy