2017 Gunnar Cycles USA Grand Disc Base

	48	50	52	54	56	58	60	62	64	66	68
Stack	513mm	531mm	563mm	568mm	600mm	611mm	636mm	651mm	677mm	687mm	711mm
Reach	363mm	373mm	385mm	384mm	380mm	381mm	384mm	390mm	386mm	393mm	391mm
Stack to Reach Ratio	1.41:1	1.42:1	1.46:1	1.48:1	1.58:1	1.6:1	1.66:1	1.67:1	1.75:1	1.75:1	1.82:1
Seat Tube Length, C-T	455mm	475mm	494mm	514mm	534mm	554mm	574mm	594mm	614mm	634mm	654mm
Top Tube Length, Effective/Horizontal HT Top	500mm	520mm	540mm	550mm	560mm	570mm	580mm	590mm	600mm	610mm	615mm
Top Tube Slope	8.6deg	8.3deg	9.5deg	8deg	9.4deg	8.5deg	9deg	8.4deg	9.1deg	8deg	8.5deg
Head Tube Angle	70deg	70.5deg	70.5deg	70.5deg	71deg	71deg	71.5deg	72deg	72deg	72.5deg	72.5deg
Seat Tube Angle	75.5deg	75deg	75deg	74deg	73.5deg	73deg	73deg	73deg	72.5deg	72.5deg	72.5deg
Head Tube Length	114mm	130mm	115mm	120mm	144mm	168mm	187mm	199mm	219mm	233mm	259mm
Bottom Bracket Drop	55mm	55mm	80mm	80mm	80mm	80mm	80mm	80mm	80mm	80mm	80mm
Bottom Bracket Height	262.5mm	262.5mm	269mm	269mm	269mm	269mm	269mm	269mm	269mm	269mm	269mm
Chainstay Length	435mm	435mm	450mm	450mm	450mm	450mm	450mm	455mm	460mm	460mm	460mm
Chainstay Length Max	435mm	435mm	450mm	450mm	450mm	450mm	450mm	455mm	460mm	460mm	460mm
Chainstay Length Horizontal	431.5mm	431.5mm	442.8mm	442.8mm	442.8mm	442.8mm	442.8mm	447.9mm	453mm	453mm	453mm
Chainstay Length Horizontal Max	431.5mm	431.5mm	442.8mm	442.8mm	442.8mm	442.8mm	442.8mm	447.9mm	453mm	453mm	453mm
Front-Center	590.1mm	598mm	620.4mm	621.3mm	619.4mm	625.3mm	627.3mm	630.2mm	634.1mm	634.1mm	639mm
Front-Center Horizontal	587.5mm	595.5mm	615.2mm	616.2mm	614.2mm	620.2mm	622.2mm	625.1mm	629mm	629mm	634mm
Wheelbase	1019mm	1027mm	1058mm	1059mm	1057mm	1063mm	1065mm	1073mm	1082mm	1082mm	1087mm
Wheelbase Max	1019mm	1027mm	1058mm	1059mm	1057mm	1063mm	1065mm	1073mm	1082mm	1082mm	1087mm
Fork Offset/Rake	55mm	52mm	56mm	56mm	53mm	53mm	50mm	47mm	47mm	43mm	43mm
Fork Length (Axle-To-Crown)	400mm	400mm	400mm	400mm	400mm	400mm	400mm	400mm	400mm	400mm	400mm
Trail	57mm mid/neutral	57.3mm mid/neutral	64.2mm mid/neutral	64.2mm mid/neutral	64.1mm mid/neutral	64.1mm mid/neutral	64.1mm mid/neutral	64mm mid/neutral	64mm mid/neutral	65mm mid/neutral	65mm mid/neutral
Mechanical Trail	53.6mm	54mm	60.5mm	60.5mm	60.6mm	60.6mm	60.7mm	60.9mm	60.9mm	62mm	62mm
Wheel Flop	18.3mm	18mm	20.2mm	20.2mm	19.7mm	19.7mm	19.3mm	18.8mm	18.8mm	18.6mm	18.6mm
Standover Height	716mm	734mm	762mm	774mm	796mm	813mm	832mm	853mm	871mm	888mm	910mm
Tire to Pedal Spindle	102.6mm 170 mm cranks	110.5mm 170 mm cranks	101.4mm 170 mm cranks	102.3mm 170 mm cranks	100.4mm 170 mm cranks	106.3mm 170 mm cranks	108.3mm 170 mm cranks	111.2mm 170 mm cranks	115.1mm 170 mm cranks	115.1mm 170 mm cranks	120mm 170 mm cranks
Pedal Spindle to Ground Clearance	92.5mm 170 mm cranks	92.5mm 170 mm cranks	99mm 170 mm cranks	99mm 170 mm cranks	99mm 170 mm cranks	99mm 170 mm cranks	99mm 170 mm cranks	99mm 170 mm cranks	99mm 170 mm cranks	99mm 170 mm cranks	99mm 170 mm cranks

	48	50	52	54	56	58	60	62	64	66	68
Wheel Size	26 in 559 mm BSD	26 in 559 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	700C/29 in 622 mm BSD
Tire Width	38mm	38mm	38mm	38mm	38mm	38mm	38mm	38mm	38mm	38mm	38mm
Tire Width Max	38mm	38mm	38mm	38mm	38mm	38mm	38mm	38mm	38mm	38mm	38mm
Tire Outer Diameter	635mm	635mm	698mm	698mm	698mm	698mm	698mm	698mm	698mm	698mm	698mm
Bike Length with Tires	1654mm	1662mm	1756mm	1757mm	1755mm	1761mm	1763mm	1771mm	1780mm	1780mm	1785mm

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

Touring

Source:Bike Counterculture Geometry Database

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2017 Gunnar Cycles USA Grand Disc Base

Geometry

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Stack and Reach vs. Category Trend