Compare: 2024 Specialized Bicycles Roubaix Base 52 vs 2025 LightCarbon LCR018-D Base S(520)

Insights

Somewhat upright stack and reach vs trend of endurance road bikes

Design deviates from other sizes of Specialized Bicycles Roubaix

Average stack and reach vs trend of endurance road bikes

Design deviates from other sizes of LightCarbon LCR018-D

Bar type unusual for category

This: Aero Bar
Category: Drop Bar

Stack	566mm	552mm -14mm
Reach	370mm	377mm +7mm
Stack to Reach Ratio	1.53:1	1.46:1
Seat Tube Length, C-TTT	445mm	—
Seat Tube Length, Unknown	—	480mm
Top Tube Length, Effective/Horizontal HT Top	534mm	—
Top Tube Length, Effective/Horizontal Unknown	—	535mm
Top Tube Slope	13.4deg	10.1deg -3.3deg
Head Tube Angle	71.5deg	72deg +0.5deg
Seat Tube Angle	74deg	74deg +0deg
Head Tube Length	105mm	137mm +32mm
Bottom Bracket Drop	80mm	78mm -2mm
Bottom Bracket Height	263mm	273mm +10mm
Chainstay Length	418mm	415mm -3mm
Chainstay Length Horizontal	410.3mm	407.6mm -2.7mm
Front-Center	593mm	589.8mm -3.2mm
Front-Center Horizontal	587.7mm	584.6mm -3.1mm
Wheelbase	998mm	992.2mm -5.8mm
Fork Offset/Rake	52mm	51mm -1mm
Fork Length (On-Axis)	375mm	—
Fork Length, Unknown	—	378mm
Trail	59.9mm mid/neutral	60.4mm +0.5mm mid/neutral
Mechanical Trail	56.8mm	57.5mm +0.7mm
Wheel Flop	18mm	17.8mm -0.2mm
Standover Height	747mm	—
Tire to Pedal Spindle	80mm 170 mm cranks	68.8mm -11.2mm 170 mm cranks
Pedal Spindle to Ground Clearance	93mm 170 mm cranks	103mm +10mm 170 mm cranks

Wheel Size	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD
Tire Width	32mm	40mm +8mm
Tire Width Max	40mm	—
Tire Outer Diameter	686mm	702mm +16mm
Bike Length with Tires	1684mm	1694.2mm +10.2mm
Crank Length	170mm	—
Handlebar Width	400mm	—
Stem Length	90mm	—
Suspension Type	Rigid, non-suspension corrected	Rigid, non-suspension corrected
Bar Type	Drop Bar	Aero Bar
Frame Material	Carbon/Composite	Carbon/Composite
Fork Material	Carbon/Composite	Carbon/Composite
Brake Type	Disc	Disc