2018 Specialized Bicycles Roubaix Expert

	49	52	54	56	58	61
Stack	549mm	569mm	585mm	611mm	644mm	665mm
Reach	369mm	371mm	375mm	381mm	386mm	392mm
Stack to Reach Ratio	1.49:1	1.53:1	1.56:1	1.6:1	1.67:1	1.7:1
Seat Tube Length, C-T	425mm	462mm	481mm	501mm	522mm	563mm
Top Tube Length, Effective/Horizontal Center	527mm	534.9mm	545mm	561.8mm	576.3mm	588.5mm
Top Tube Slope	16.1deg	14.1deg	13.6deg	14deg	15deg	12.8deg
Head Tube Angle	72deg	72.25deg	72.75deg	73.5deg	73.5deg	74deg
Seat Tube Angle	74deg	74deg	74deg	73.5deg	73.5deg	73.5deg
Head Tube Length	90mm	110mm	125mm	150mm	185mm	205mm
Bottom Bracket Drop	77.5mm	77.5mm	76mm	76mm	74.5mm	74.5mm
Bottom Bracket Height	261.5mm	261.5mm	263mm	263mm	264.5mm	264.5mm
Chainstay Length	413mm	413mm	415mm	415mm	418mm	418mm
Chainstay Length Horizontal	405.7mm	405.7mm	408mm	408mm	411.3mm	411.3mm
Front-Center	580mm	586mm	584mm	590mm	605mm	612mm
Front-Center Horizontal	575.3mm	581.3mm	579mm	585mm	599.7mm	606.7mm
Wheelbase	981mm	987mm	987mm	993mm	1011mm	1018mm
Fork Offset/Rake	50mm	50mm	44mm	44mm	44mm	44mm
Trail	57.6mm mid/neutral	56mm mid/neutral	59.2mm mid/neutral	54.5mm mid/neutral	54.5mm mid/neutral	51.4mm mid/neutral
Mechanical Trail	54.8mm	53.4mm	56.5mm	52.3mm	52.3mm	49.4mm
Wheel Flop	16.9mm	16.3mm	16.8mm	14.9mm	14.9mm	13.6mm
Standover Height	715.5mm	743mm	762mm	785mm	813mm	844.3mm
Tire to Pedal Spindle	71mm 170 mm cranks	77mm 170 mm cranks	72.5mm 172.5 mm cranks	78.5mm 172.5 mm cranks	91mm 175 mm cranks	98mm 175 mm cranks
Pedal Spindle to Ground Clearance	91.5mm 170 mm cranks	91.5mm 170 mm cranks	90.5mm 172.5 mm cranks	90.5mm 172.5 mm cranks	89.5mm 175 mm cranks	89.5mm 175 mm cranks

	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
Tire Width	28mm	28mm	28mm	28mm	28mm	28mm
Tire Outer Diameter	678mm	678mm	678mm	678mm	678mm	678mm
Bike Length with Tires	1659mm	1665mm	1665mm	1671mm	1689mm	1696mm
Crank Length	170mm	170mm	172.5mm	172.5mm	175mm	175mm
Handlebar Width	400mm	420mm	420mm	420mm	440mm	440mm
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://www.specialized.com/us/en/roubaix-expert/p/133928?color=240098-133928&searchText=94418-3152

Geometry