	49cm	52cm	54cm	56cm	58cm	60cm	62cm
Stack	517mm	536mm	555mm	575mm	596mm	618mm	639mm
Reach	375mm	381mm	393mm	399mm	405mm	410mm	425mm
Stack to Reach Ratio	1.38:1	1.41:1	1.41:1	1.44:1	1.47:1	1.51:1	1.5:1
Seat Tube Length, Unknown	445mm	470mm	500mm	510mm	515mm	525mm	535mm
Top Tube Length, Effective/Horizontal Center	510mm	526mm	545mm	559mm	573mm	593mm	611mm
Top Tube Slope	10.1deg	9.3deg	7.9deg	8.9deg	10.4deg	11.6deg	12.3deg
Head Tube Angle	71.75deg	72deg	73deg	73deg	73deg	73deg	73.25deg
Seat Tube Angle	75.5deg	75deg	74.75deg	74.5deg	74.25deg	74deg	73.75deg
Head Tube Length	115mm	134mm	150mm	171mm	193mm	219mm	239mm
Bottom Bracket Drop	76mm	76mm	75mm	74mm	74mm	72mm	72mm
Bottom Bracket Height	263mm	263mm	264mm	265mm	265mm	267mm	267mm
Chainstay Length	407mm	407mm	410mm	410mm	410mm	410mm	412mm
Chainstay Length Horizontal	399.8mm	399.8mm	403.1mm	403.3mm	403.3mm	403.6mm	405.7mm
Front-Center	578mm	588mm	592mm	604mm	616mm	633mm	647mm
Front-Center Horizontal	573.2mm	583.2mm	586.9mm	599.7mm	611.7mm	629.4mm	642.3mm
Wheelbase	973mm	983mm	990mm	1003mm	1015mm	1033mm	1048mm
Fork Offset/Rake	50mm	50mm	45mm	45mm	45mm	45mm	45mm
Trail	59.1mm mid/neutral	57.6mm mid/neutral	56.6mm mid/neutral	56.6mm mid/neutral	56.6mm mid/neutral	56.6mm mid/neutral	55mm mid/neutral
Mechanical Trail	56.2mm	54.8mm	54.1mm	54.1mm	54.1mm	54.1mm	52.7mm
Wheel Flop	17.6mm	16.9mm	15.8mm	15.8mm	15.8mm	15.8mm	15.2mm
Standover Height	746mm	767mm	792mm	807mm	820mm	838mm	853mm
Tire to Pedal Spindle	69mm 170 mm cranks	79mm 170 mm cranks	83mm 170 mm cranks	95mm 170 mm cranks	107mm 170 mm cranks	124mm 170 mm cranks	138mm 170 mm cranks
Pedal Spindle to Ground Clearance	93mm 170 mm cranks	93mm 170 mm cranks	94mm 170 mm cranks	95mm 170 mm cranks	95mm 170 mm cranks	97mm 170 mm cranks	97mm 170 mm cranks

	49cm	52cm	54cm	56cm	58cm	60cm	62cm
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	700C/29 in 622 mm BSD
Tire Width	28mm	28mm	28mm	28mm	28mm	28mm	28mm
Tire Outer Diameter	678mm	678mm	678mm	678mm	678mm	678mm	678mm
Bike Length with Tires	1651mm	1661mm	1668mm	1681mm	1693mm	1711mm	1726mm

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:22bicycles.com

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2026/v2 No. 22 Bicycle Company Reactor Aero Base

Geometry

Base Build

Stack and Reach vs. Category Trend