2020 Gunnar Cycles USA Sport Disc Base

	480	500	520	540	560	580	600	620	640
Stack	520mm	550mm	569mm	579mm	598mm	612mm	625mm	644mm	663mm
Reach	363mm	374mm	374mm	382mm	381mm	382mm	387mm	386mm	402mm
Stack to Reach Ratio	1.43:1	1.47:1	1.52:1	1.52:1	1.57:1	1.6:1	1.61:1	1.67:1	1.65:1
Seat Tube Length, C-T	440mm	470mm	490mm	510mm	530mm	550mm	570mm	590mm	610mm
Top Tube Length, Effective/Horizontal Center	500mm	525mm	535mm	550mm	560mm	570mm	580mm	590mm	600mm
Top Tube Length, Actual C-C	484.6mm	509.4mm	518.4mm	533.6mm	542.6mm	552.5mm	563.6mm	572.5mm	584.4mm
Top Tube Slope	11.9deg	9.6deg	9.5deg	8.2deg	8.2deg	7.6deg	6.8deg	6.9deg	6.4deg
Head Tube Angle	71.5deg	71deg	71.5deg	71.5deg	71.5deg	71.5deg	71.5deg	71.5deg	72deg
Seat Tube Angle	75.5deg	75deg	74.5deg	74deg	73.5deg	73deg	73deg	72.5deg	73.5deg
Head Tube Length	100mm	124mm	142mm	152mm	172mm	187mm	201mm	221mm	239mm
Bottom Bracket Drop	63mm	75mm	75mm	75mm	75mm	75mm	75mm	75mm	75mm
Bottom Bracket Height	261mm	268mm	268mm	268mm	268mm	268mm	268mm	268mm	268mm
Chainstay Length	420mm	430mm	430mm	430mm	430mm	430mm	430mm	430mm	430mm
Chainstay Length Horizontal	415.3mm	423.4mm	423.4mm	423.4mm	423.4mm	423.4mm	423.4mm	423.4mm	423.4mm
Front-Center	567mm	595mm	596mm	607mm	613mm	618mm	628mm	633mm	650mm
Front-Center Horizontal	562.8mm	589.6mm	591.6mm	602.6mm	608.6mm	613.6mm	623.6mm	628.6mm	645.6mm
Wheelbase	978mm	1013mm	1015mm	1026mm	1032mm	1037mm	1047mm	1052mm	1069mm
Fork Offset/Rake	45mm	50mm	50mm	50mm	50mm	50mm	50mm	50mm	50mm
Fork Length, Unknown	383mm	382mm	382mm	382mm	382mm	382mm	382mm	382mm	382mm
Trail	61mm mid/neutral	65.2mm high	62mm mid/neutral	62mm mid/neutral	62mm mid/neutral	62mm mid/neutral	62mm mid/neutral	62mm mid/neutral	58.9mm mid/neutral
Mechanical Trail	57.8mm	61.7mm	58.8mm	58.8mm	58.8mm	58.8mm	58.8mm	58.8mm	56mm
Wheel Flop	18.3mm	20.1mm	18.7mm	18.7mm	18.7mm	18.7mm	18.7mm	18.7mm	17.3mm
Standover Height	713mm	745mm	764mm	778mm	796mm	812mm	828mm	847mm	867mm
Tire to Pedal Spindle	73mm 170 mm cranks	82mm 170 mm cranks	83mm 170 mm cranks	94mm 170 mm cranks	100mm 170 mm cranks	105mm 170 mm cranks	115mm 170 mm cranks	120mm 170 mm cranks	137mm 170 mm cranks
Pedal Spindle to Ground Clearance	91mm 170 mm cranks	98mm 170 mm cranks	98mm 170 mm cranks	98mm 170 mm cranks	98mm 170 mm cranks	98mm 170 mm cranks	98mm 170 mm cranks	98mm 170 mm cranks	98mm 170 mm cranks

	480	500	520	540	560	580	600	620	640
Wheel Size	650B/27.5 in 584 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	700C/29 in 622 mm BSD
Tire Width	32mm	32mm	32mm	32mm	32mm	32mm	32mm	32mm	32mm
Tire Outer Diameter	648mm	686mm	686mm	686mm	686mm	686mm	686mm	686mm	686mm
Bike Length with Tires	1626mm	1699mm	1701mm	1712mm	1718mm	1723mm	1733mm	1738mm	1755mm

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:http://gunnarbikes.com/site/sport-disc/

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2020 Gunnar Cycles USA Sport Disc Base

Geometry

Base Build

Stack and Reach vs. Category Trend