2026 Surly Bikes Midnight Special Base

	40	46	50	54	56	58	60	64
Stack	533mm	539mm	546mm	562mm	581mm	600mm	621mm	642mm
Reach	360mm	363mm	376mm	386mm	392mm	402mm	409mm	421mm
Stack to Reach Ratio	1.48:1	1.48:1	1.45:1	1.46:1	1.48:1	1.49:1	1.52:1	1.52:1
Seat Tube Length, C-T	400mm	460mm	500mm	540mm	560mm	580mm	600mm	640mm
Top Tube Length, Effective/Horizontal HT Top	501mm	521mm	541mm	556mm	570mm	585mm	605mm	625mm
Top Tube Slope	17.6deg	11.2deg	7.4deg	4.8deg	4.7deg	4.5deg	4.7deg	3deg
Head Tube Angle	70.7deg	71.2deg	71.7deg	72.2deg	73deg	73deg	73.5deg	73.9deg
Seat Tube Angle	75.2deg	73.7deg	73.2deg	73.2deg	73deg	73deg	72.5deg	72.4deg
Head Tube Length	95mm	100mm	110mm	125mm	140mm	160mm	180mm	200mm
Bottom Bracket Drop	68mm	68mm	63mm	63mm	65mm	65mm	65mm	65mm
Bottom Bracket Height	278mm	278mm	283mm	283mm	281mm	281mm	281mm	281mm
Chainstay Length	425mm	425mm	425mm	425mm	425mm	425mm	425mm	425mm
Chainstay Length Horizontal	419.5mm	419.5mm	420.3mm	420.3mm	420mm	420mm	420mm	420mm
Front-Center	580.5mm	580.5mm	592.1mm	602mm	605.5mm	620.4mm	629.4mm	643.3mm
Front-Center Horizontal	576.5mm	576.5mm	588.7mm	598.7mm	602mm	617mm	626mm	640mm
Wheelbase	996mm	996mm	1009mm	1019mm	1022mm	1037mm	1046mm	1060mm
Fork Offset/Rake	50mm	50mm	50mm	50mm	50mm	50mm	50mm	50mm
Fork Length (Axle-To-Crown)	402mm	402mm	402mm	402mm	402mm	402mm	402mm	402mm
Trail	68.2mm high	65mm mid/neutral	61.8mm mid/neutral	58.6mm mid/neutral	53.5mm mid/neutral	53.5mm mid/neutral	50.3mm mid/neutral	47.8mm mid/neutral
Mechanical Trail	64.4mm	61.5mm	58.6mm	55.8mm	51.2mm	51.2mm	48.3mm	46mm
Wheel Flop	21.3mm	19.8mm	18.4mm	17.1mm	15mm	15mm	13.7mm	12.7mm
Standover Height	706mm	748mm	779mm	809mm	830mm	849mm	868mm	900mm
Tire to Pedal Spindle	69.5mm 165 mm cranks	69.5mm 165 mm cranks	76.1mm 170 mm cranks	86mm 170 mm cranks	89.5mm 170 mm cranks	99.4mm 175 mm cranks	108.4mm 175 mm cranks	122.3mm 175 mm cranks
Pedal Spindle to Ground Clearance	113mm 165 mm cranks	113mm 165 mm cranks	113mm 170 mm cranks	113mm 170 mm cranks	111mm 170 mm cranks	106mm 175 mm cranks	106mm 175 mm cranks	106mm 175 mm cranks

	40	46	50	54	56	58	60	64
Wheel Size	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD
Tire Width	35mm	35mm	35mm	35mm	35mm	35mm	35mm	35mm
Tire Width Max	42mm	42mm	42mm	42mm	42mm	42mm	42mm	42mm
Tire Outer Diameter	692mm	692mm	692mm	692mm	692mm	692mm	692mm	692mm
Bike Length with Tires	1688mm	1688mm	1701mm	1711mm	1714mm	1729mm	1738mm	1752mm
Crank Length	165mm	165mm	170mm	170mm	170mm	175mm	175mm	175mm
Handlebar Width	400mm	400mm	420mm	440mm	440mm	460mm	460mm	460mm
Stem Length	70mm	80mm	80mm	100mm	100mm	120mm	120mm	120mm

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.

Learn more about the Upright/Aggressive Scale

Category Trend

Endurance Road

Source:https://surlybikes.com/products/midnight-special-700c-black-cherry-fizz

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2026 Surly Bikes Midnight Special Base

Geometry

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Stack and Reach vs. Category Trend