2017 Gunnar Cycles USA Sport Base

	48	50	52	54	56	58	60	62	64	66	68
Stack	507mm	541mm	548mm	579mm	596mm	612mm	631mm	650mm	669mm	689mm	710mm
Reach	360mm	374mm	380mm	382mm	382mm	382mm	386mm	385mm	389mm	393mm	396mm
Stack to Reach Ratio	1.41:1	1.45:1	1.44:1	1.52:1	1.56:1	1.6:1	1.63:1	1.69:1	1.72:1	1.75:1	1.79:1
Seat Tube Length, C-T	410mm	415mm	490mm	510mm	530mm	550mm	570mm	590mm	610mm	630mm	650mm
Top Tube Length, Effective/Horizontal HT Top	500mm	515mm	530mm	550mm	560mm	570mm	580mm	590mm	600mm	610mm	620mm
Top Tube Slope	13.4deg	16.3deg	8.4deg	9.6deg	9.4deg	9deg	8.8deg	8.8deg	8.7deg	8.6deg	8.7deg
Head Tube Angle	71.5deg	71.5deg	72deg	72.5deg	72.5deg	72.5deg	72.5deg	72.5deg	72.5deg	72.5deg	72.5deg
Seat Tube Angle	75deg	76deg	75deg	74deg	73.5deg	73deg	73deg	72.5deg	72.5deg	72.5deg	72.5deg
Head Tube Length	135mm	119mm	137mm	154mm	172mm	189mm	209mm	229mm	249mm	270mm	291mm
Bottom Bracket Drop	55mm	75mm	75mm	75mm	75mm	75mm	75mm	75mm	75mm	75mm	75mm
Bottom Bracket Height	252.5mm	264mm	264mm	264mm	264mm	264mm	264mm	264mm	264mm	264mm	264mm
Chainstay Length	405mm	425mm	425mm	425mm	425mm	430mm	430mm	430mm	430mm	430mm	430mm
Chainstay Length Max	405mm	425mm	425mm	425mm	425mm	530mm	530mm	530mm	530mm	530mm	530mm
Chainstay Length Horizontal	401.3mm	418.3mm	418.3mm	418.3mm	418.3mm	423.4mm	423.4mm	423.4mm	423.4mm	423.4mm	423.4mm
Chainstay Length Horizontal Max	401.3mm	418.3mm	418.3mm	418.3mm	418.3mm	524.7mm	524.7mm	524.7mm	524.7mm	524.7mm	524.7mm
Front-Center	559.5mm	585.5mm	588.5mm	592.4mm	597.4mm	603.3mm	613.2mm	617.2mm	627.1mm	637mm	647mm
Front-Center Horizontal	556.8mm	580.7mm	583.7mm	587.7mm	592.7mm	598.6mm	608.6mm	612.6mm	622.6mm	632.6mm	642.6mm
Wheelbase	958mm	999mm	1002mm	1006mm	1011mm	1022mm	1032mm	1036mm	1046mm	1056mm	1066mm
Wheelbase Max	958mm	999mm	1002mm	1006mm	1011mm	1022mm	1032mm	1036mm	1046mm	1056mm	1066mm
Fork Offset/Rake	43mm	48mm	48mm	45mm	45mm	45mm	45mm	45mm	45mm	45mm	45mm
Fork Length (Axle-To-Crown)	374mm	374mm	374mm	374mm	374mm	374mm	374mm	374mm	374mm	374mm	374mm
Trail	57.5mm mid/neutral	62.8mm mid/neutral	59.7mm mid/neutral	59.7mm mid/neutral	59.7mm mid/neutral	59.7mm mid/neutral	59.7mm mid/neutral	59.7mm mid/neutral	59.7mm mid/neutral	59.7mm mid/neutral	59.7mm mid/neutral
Mechanical Trail	54.6mm	59.6mm	56.8mm	56.9mm	56.9mm	56.9mm	56.9mm	56.9mm	56.9mm	56.9mm	56.9mm
Wheel Flop	17.3mm	18.9mm	17.5mm	17.1mm	17.1mm	17.1mm	17.1mm	17.1mm	17.1mm	17.1mm	17.1mm
Standover Height	687mm	716mm	759mm	778mm	795mm	810mm	832mm	850mm	869mm	889mm	908mm
Tire to Pedal Spindle	82mm 170 mm cranks	76.5mm 170 mm cranks	79.5mm 170 mm cranks	83.4mm 170 mm cranks	88.4mm 170 mm cranks	94.3mm 170 mm cranks	104.2mm 170 mm cranks	108.2mm 170 mm cranks	118.1mm 170 mm cranks	128mm 170 mm cranks	138mm 170 mm cranks
Pedal Spindle to Ground Clearance	82.5mm 170 mm cranks	94mm 170 mm cranks	94mm 170 mm cranks	94mm 170 mm cranks	94mm 170 mm cranks	94mm 170 mm cranks	94mm 170 mm cranks	94mm 170 mm cranks	94mm 170 mm cranks	94mm 170 mm cranks	94mm 170 mm cranks

	48	50	52	54	56	58	60	62	64	66	68
Wheel Size	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	700C/29 in 622 mm BSD
Tire Width	28mm	28mm	28mm	28mm	28mm	28mm	28mm	28mm	28mm	28mm	28mm
Tire Width Max	28mm	28mm	28mm	28mm	28mm	28mm	28mm	28mm	28mm	28mm	28mm
Tire Outer Diameter	615mm	678mm	678mm	678mm	678mm	678mm	678mm	678mm	678mm	678mm	678mm
Bike Length with Tires	1573mm	1677mm	1680mm	1684mm	1689mm	1700mm	1710mm	1714mm	1724mm	1734mm	1744mm

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

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Source:Bike Counterculture Geometry Database

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2017 Gunnar Cycles USA Sport Base

Geometry

Base Build

Stack and Reach vs. Category Trend