2017 All-City Cycles Big Block Base

	46cm	49cm	52cm	55cm	58cm	61cm
Stack	509mm	525mm	545mm	566mm	590mm	616mm
Reach	384mm	394mm	394mm	399mm	421mm	434mm
Stack to Reach Ratio	1.33:1	1.33:1	1.38:1	1.42:1	1.4:1	1.42:1
Seat Tube Length, C-TTT	460mm	490mm	520mm	550mm	580mm	610mm
Top Tube Length, Effective/Horizontal HT Top	520mm	535mm	550mm	565mm	585mm	605mm
Top Tube Slope	5.1deg	3.5deg	2.6deg	1.7deg	1.2deg	0.9deg
Head Tube Angle	73deg	73.5deg	74deg	74.5deg	74.5deg	75deg
Seat Tube Angle	75deg	75deg	74.5deg	74.5deg	74.5deg	74.5deg
Head Tube Length	95mm	110mm	130mm	150mm	175mm	200mm
Bottom Bracket Drop	58mm	58mm	58mm	58mm	58mm	58mm
Bottom Bracket Height	281mm	281mm	281mm	281mm	281mm	281mm
Chainstay Length	396mm	396mm	396mm	396mm	396mm	396mm
Chainstay Length Horizontal	391.7mm	391.7mm	391.7mm	391.7mm	391.7mm	391.7mm
Front-Center	556.8mm	568mm	574.4mm	585.1mm	605mm	619.8mm
Front-Center Horizontal	553.8mm	565.1mm	571.5mm	582.2mm	602.2mm	617.1mm
Wheelbase	945.5mm	956.8mm	963.2mm	973.9mm	993.9mm	1008.8mm
Fork Offset/Rake	32mm	32mm	32mm	32mm	32mm	32mm
Fork Length (Axle-To-Crown)	375mm	375mm	375mm	375mm	375mm	375mm
Trail	70.2mm high	67mm high	63.9mm mid/neutral	60.8mm mid/neutral	60.8mm mid/neutral	57.7mm mid/neutral
Mechanical Trail	67.1mm	64.3mm	61.4mm	58.6mm	58.6mm	55.7mm
Wheel Flop	19.6mm	18.3mm	16.9mm	15.7mm	15.7mm	14.4mm
Standover Height	750mm	772mm	796mm	821mm	847mm	874mm
Tire to Pedal Spindle	52.8mm 165 mm cranks	64mm 165 mm cranks	70.4mm 165 mm cranks	81.1mm 165 mm cranks	101mm 165 mm cranks	115.8mm 165 mm cranks
Pedal Spindle to Ground Clearance	116mm 165 mm cranks	116mm 165 mm cranks	116mm 165 mm cranks	116mm 165 mm cranks	116mm 165 mm cranks	116mm 165 mm cranks

	46cm	49cm	52cm	55cm	58cm	61cm
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	1623.5mm	1634.8mm	1641.2mm	1651.9mm	1671.9mm	1686.8mm
Crank Length	165mm	165mm	165mm	165mm	165mm	165mm
Handlebar Width	40cm	40cm	42cm	42cm	44cm	44cm
Stem Length	80mm	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://allcitycycles.com/bikes/big_block

Geometry