2021 Allied Cycle Works Alfa Disc Plus Headtube

	49+	52+	54+	56+	58+	61+
Stack	520mm	542mm	559mm	580mm	607mm	628mm
Reach	376mm	381mm	382mm	391mm	398mm	404mm
Stack to Reach Ratio	1.38:1	1.42:1	1.46:1	1.48:1	1.53:1	1.55:1
Seat Tube Length, Unknown	482mm	512mm	532mm	552mm	572mm	602mm
Top Tube Length, Effective/Horizontal Unknown	513mm	537mm	548mm	565mm	583mm	601mm
Top Tube Slope	6.1deg	5.5deg	5.2deg	5.3deg	6.1deg	5.3deg
Head Tube Angle	72.25deg	73deg	73deg	73.5deg	73.5deg	74deg
Seat Tube Angle	75.5deg	74deg	73.5deg	73.25deg	73deg	72.5deg
Head Tube Length	117mm	137mm	157mm	177mm	207mm	227mm
Bottom Bracket Drop	71.5mm	71.5mm	69mm	69mm	67.5mm	67.5mm
Bottom Bracket Height	264.5mm	264.5mm	267mm	267mm	268.5mm	268.5mm
Chainstay Length	410mm	410mm	410mm	410mm	410mm	410mm
Chainstay Length Horizontal	403.7mm	403.7mm	404.2mm	404.2mm	404.4mm	404.4mm
Front-Center	569.8mm	574.8mm	581mm	591.9mm	607.4mm	614.3mm
Front-Center Horizontal	565.3mm	570.3mm	576.9mm	587.9mm	603.6mm	610.6mm
Wheelbase	969mm	974mm	981mm	992mm	1008mm	1015mm
Fork Offset/Rake	44mm	44mm	44mm	44mm	44mm	44mm
Fork Length (On-Axis)	371mm	371mm	371mm	371mm	371mm	371mm
Trail	61.4mm mid/neutral	56.7mm mid/neutral	56.7mm mid/neutral	53.6mm mid/neutral	53.6mm mid/neutral	50.6mm mid/neutral
Mechanical Trail	58.4mm	54.2mm	54.2mm	51.4mm	51.4mm	48.6mm
Wheel Flop	17.8mm	15.9mm	15.9mm	14.6mm	14.6mm	13.4mm
Standover Height	750mm	775mm	791mm	815mm	839mm	—
Tire to Pedal Spindle	63.8mm 170 mm cranks	68.8mm 170 mm cranks	75mm 170 mm cranks	85.9mm 170 mm cranks	101.4mm 170 mm cranks	108.3mm 170 mm cranks
Pedal Spindle to Ground Clearance	94.5mm 170 mm cranks	94.5mm 170 mm cranks	97mm 170 mm cranks	97mm 170 mm cranks	98.5mm 170 mm cranks	98.5mm 170 mm cranks

	49+	52+	54+	56+	58+	61+
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
Tire Width	25mm	25mm	25mm	25mm	25mm	25mm
Tire Width Max	28mm	28mm	28mm	28mm	28mm	28mm
Tire Outer Diameter	672mm	672mm	672mm	672mm	672mm	672mm
Bike Length with Tires	1641mm	1646mm	1653mm	1664mm	1680mm	1687mm

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

Performance Road

Source:https://alliedcycleworks.com/pages/allied-alfa-disc

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2021 Allied Cycle Works Alfa Disc Plus Headtube

Geometry

Plus Headtube Build

Stack and Reach vs. Category Trend