2021 Specialized Bicycles Roubaix Sport Base

	44	49	52	54	56	58	61
Stack	540mm	551mm	563mm	577mm	600mm	615mm	644mm
Reach	363mm	370mm	374mm	378mm	384mm	391mm	398mm
Stack to Reach Ratio	1.49:1	1.49:1	1.51:1	1.53:1	1.56:1	1.57:1	1.62:1
Seat Tube Length, Unknown	370mm	425mm	455mm	480mm	500mm	530mm	560mm
Top Tube Length, Actual C-C	500mm	515mm	531mm	543mm	565mm	581mm	600mm
Top Tube Slope	21.8deg	16.3deg	14.1deg	12.8deg	12.9deg	11.2deg	10.9deg
Head Tube Angle	70.5deg	71.75deg	72.5deg	72.5deg	73deg	73deg	73deg
Seat Tube Angle	75.5deg	75deg	74deg	74deg	73.5deg	73.5deg	73.5deg
Head Tube Length	115mm	128mm	140mm	155mm	185mm	200mm	230mm
Bottom Bracket Drop	80mm	80mm	78mm	78mm	76mm	76mm	76mm
Bottom Bracket Height	261mm	261mm	263mm	263mm	265mm	265mm	265mm
Chainstay Length	415mm	415mm	415mm	415mm	415mm	415mm	415mm
Chainstay Length Horizontal	407.2mm	407.2mm	407.6mm	407.6mm	408mm	408mm	408mm
Front-Center	587.3mm	587.3mm	588.6mm	592.6mm	596.9mm	606.8mm	627.6mm
Front-Center Horizontal	581.8mm	581.8mm	583.4mm	587.4mm	592mm	602mm	623mm
Wheelbase	989mm	989mm	991mm	995mm	1000mm	1010mm	1031mm
Fork Offset/Rake	52.7mm	53.6mm	53.9mm	49.7mm	45.7mm	44.2mm	49.1mm
Trail	64.9mm mid/neutral	56mm mid/neutral	51mm mid/neutral	55.5mm mid/neutral	56.4mm mid/neutral	58mm mid/neutral	52.9mm mid/neutral
Mechanical Trail	61.1mm	53.2mm	48.7mm	52.9mm	54mm	55.5mm	50.6mm
Wheel Flop	20.4mm	16.7mm	14.6mm	15.9mm	15.8mm	16.2mm	14.8mm
Tire to Pedal Spindle	76.3mm 170 mm cranks	76.3mm 170 mm cranks	77.6mm 170 mm cranks	81.6mm 170 mm cranks	85.9mm 170 mm cranks	95.8mm 170 mm cranks	116.6mm 170 mm cranks
Pedal Spindle to Ground Clearance	91mm 170 mm cranks	91mm 170 mm cranks	93mm 170 mm cranks	93mm 170 mm cranks	95mm 170 mm cranks	95mm 170 mm cranks	95mm 170 mm cranks

	44	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	700C/29 in 622 mm BSD
Tire Width	30mm	30mm	30mm	30mm	30mm	30mm	30mm
Tire Outer Diameter	682mm	682mm	682mm	682mm	682mm	682mm	682mm
Bike Length with Tires	1671mm	1671mm	1673mm	1677mm	1682mm	1692mm	1713mm

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

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Source:CHAT GPT

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2021 Specialized Bicycles Roubaix Sport Base

Geometry

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Stack and Reach vs. Category Trend