2021 All-City Cycles Big Block Base

	46cm	49cm	52cm	55cm	58cm	61cm
Stack	509mm	525mm	546mm	567mm	591mm	616mm
Reach	382mm	393mm	398mm	408mm	421mm	434mm
Stack to Reach Ratio	1.33:1	1.34:1	1.37:1	1.39:1	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	2.7deg	1.8deg	1.3deg	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	285mm	285mm	285mm	285mm	285mm	285mm
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	556.3mm	568.2mm	574.2mm	585.2mm	605.1mm	620mm
Front-Center Horizontal	553.3mm	565.3mm	571.3mm	582.3mm	602.3mm	617.3mm
Wheelbase	945mm	957mm	963mm	974mm	994mm	1009mm
Fork Offset/Rake	32mm	32mm	32mm	32mm	32mm	32mm
Fork Length (Axle-To-Crown)	375mm	375mm	375mm	375mm	375mm	375mm
Trail	71.4mm high	68.2mm high	65.1mm high	61.9mm mid/neutral	61.9mm mid/neutral	58.8mm mid/neutral
Mechanical Trail	68.3mm	65.4mm	62.5mm	59.7mm	59.7mm	56.8mm
Wheel Flop	20mm	18.6mm	17.2mm	15.9mm	15.9mm	14.7mm
Standover Height	743mm	767mm	793mm	821mm	846mm	874mm
Tire to Pedal Spindle	48.3mm 165 mm cranks	60.2mm 165 mm cranks	66.2mm 165 mm cranks	77.2mm 165 mm cranks	97.1mm 165 mm cranks	112mm 165 mm cranks
Pedal Spindle to Ground Clearance	120mm 165 mm cranks	120mm 165 mm cranks	120mm 165 mm cranks	120mm 165 mm cranks	120mm 165 mm cranks	120mm 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	32mm	32mm	32mm	32mm	32mm	32mm
Tire Width Max	32mm	32mm	32mm	32mm	32mm	32mm
Tire Outer Diameter	686mm	686mm	686mm	686mm	686mm	686mm
Bike Length with Tires	1631mm	1643mm	1649mm	1660mm	1680mm	1695mm
Crank Length	165mm	165mm	165mm	165mm	165mm	165mm
Handlebar Width	720mm	720mm	720mm	720mm	720mm	720mm
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