2023 Allied Cycle Works Alfa Base

	48	52	54	56	58	61
Stack	515mm	530mm	550mm	570mm	595mm	620mm
Reach	375mm	383mm	389mm	396mm	404mm	410mm
Stack to Reach Ratio	1.37:1	1.38:1	1.41:1	1.44:1	1.47:1	1.51:1
Seat Tube Length, C-T	440mm	490mm	510mm	530mm	560mm	585mm
Top Tube Length, Effective/Horizontal Center	523mm	535mm	547mm	565mm	580mm	594mm
Top Tube Slope	10.5deg	6.5deg	6.4deg	6.5deg	5.9deg	5.9deg
Head Tube Angle	72deg	72.5deg	73deg	73.5deg	73.5deg	73.5deg
Seat Tube Angle	74deg	74deg	74deg	73.5deg	73.5deg	73.5deg
Head Tube Length	109mm	121mm	142mm	161mm	187mm	214mm
Bottom Bracket Drop	73mm	73mm	73mm	73mm	73mm	73mm
Bottom Bracket Height	266mm	266mm	266mm	266mm	266mm	266mm
Chainstay Length	410mm	410mm	410mm	410mm	410mm	410mm
Chainstay Length Horizontal	403.5mm	403.5mm	403.5mm	403.5mm	403.5mm	403.5mm
Front-Center	569.3mm	573.2mm	585.1mm	594.1mm	608.9mm	621.9mm
Front-Center Horizontal	564.6mm	568.6mm	580.6mm	589.6mm	604.6mm	617.6mm
Wheelbase	968mm	972mm	984mm	993mm	1008mm	1021mm
Fork Offset/Rake	44mm	44mm	44mm	44mm	44mm	44mm
Trail	63.9mm mid/neutral	60.8mm mid/neutral	57.6mm mid/neutral	54.5mm mid/neutral	54.5mm mid/neutral	54.5mm mid/neutral
Mechanical Trail	60.8mm	57.9mm	55.1mm	52.3mm	52.3mm	52.3mm
Wheel Flop	18.8mm	17.4mm	16.1mm	14.9mm	14.9mm	14.9mm
Standover Height	750mm	780mm	780mm	800mm	830mm	855mm
Tire to Pedal Spindle	60.3mm 170 mm cranks	64.2mm 170 mm cranks	73.6mm 172.5 mm cranks	82.6mm 172.5 mm cranks	94.9mm 175 mm cranks	107.9mm 175 mm cranks
Pedal Spindle to Ground Clearance	96mm 170 mm cranks	96mm 170 mm cranks	93.5mm 172.5 mm cranks	93.5mm 172.5 mm cranks	91mm 175 mm cranks	91mm 175 mm cranks

	48	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	28mm	28mm	28mm	28mm	28mm	28mm
Tire Width Max	32mm	32mm	32mm	32mm	32mm	32mm
Tire Outer Diameter	678mm	678mm	678mm	678mm	678mm	678mm
Bike Length with Tires	1646mm	1650mm	1662mm	1671mm	1686mm	1699mm
Crank Length	170mm	170mm	172.5mm	172.5mm	175mm	175mm
Handlebar Width	40mm	40mm	42mm	42mm	44mm	44mm
Stem Length	90mm	90mm	100mm	100mm	110mm	110mm

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.

Category Trend

Source:https://alliedcycleworks.com/collections/alfa/products/alfa-frameset-custom

Geometry