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2018 Cannondale Synapse Carbon Disc vs 2016 Specialized Roubaix SL4 Expert Disc UDi2

The Specialized Roubaix SL4 Expert Disc UDi2 size closest to your 54 is the 54.0. Compare the 54.0 instead

What changes on the Specialized Roubaix SL4 Expert Disc UDi2

Compared with the Cannondale Synapse Carbon Disc in 54, the Specialized Roubaix SL4 Expert Disc UDi2 in 56.0 places the top of the head tube 20 mm higher and 5 mm further forward, relative to the bottom bracket. Its wheelbase is 3 mm longer, which can contribute to stability at speed.

Frame stack
+20 mm
Higher front end
Frame reach
+5 mm
Longer frame reach
Wheelbase
+3 mm
Longer: steadier at speed
Head angle
+0.8°
Steeper: sharper steering
Chainstays
n/a
One of the bikes has no number for this

The two frames

We can't draw these frames yet. The Cannondale Synapse Carbon Disc numbers we have for size 54 are missing the chainstay length. The numbers below still compare.

Geometry side by side

MeasurementCannondale Synapse Carbon Disc 54Specialized Roubaix SL4 Expert Disc UDi2 56.0Difference
Reach382387+5 mm
Stack570590+20 mm
Head tube angle71.772.5+0.8°
Seat tube angle73.973.25−0.7°
Effective top tube547565+18 mm
Wheelbase10081011+3 mm
BB drop7371.5−2 mm
BB height272271−1 mm
Standover773798+25 mm
Seat tube length480515+35 mm
Head tube length161190+29 mm
Chainstay lengthnot listed415
Fork lengthnot listed368

Differences are the Specialized Roubaix SL4 Expert Disc UDi2 minus the Cannondale Synapse Carbon Disc. Full charts: 2018 Cannondale Synapse Carbon Disc, 2016 Specialized Roubaix SL4 Expert Disc UDi2.

Where each sits in its class

Cannondale Synapse Carbon DiscSpecialized Roubaix SL4 Expert Disc UDi2

AggressivePositionUpright
CalmSteeringQuick
PlayfulBalancePlanted

Each bike is ranked against the other road bikes on Quiver, on frame geometry alone. Not your hand position or ride feel.

What each ships with

The stock build of each bike's first listed trim. Parts that match are dimmed.

PartCannondale Synapse Carbon DiscCarbon Disc 105Specialized Roubaix SL4 Expert Disc UDi2SL4 Expert Disc UDi2
FrameCannondale SynapseSpecialized SL4 FACT
ForkSynapseSpecialized FACT carbon
ShifterShimano RS505 hydroShimano 785 Di2
DerailleurShimano 105, Shimano 105 GSShimano Ultegra Di2
CassetteShimano 105Shimano Ultegra
ChainShimano HG601Shimano Ultegra
CranksetCannondale SiShimano Ultegra
TireSchwalbe LuganoSpecialized Turbo Pro
HubFormula CX20not listed
RimRD 2.0not listed
BrakeShimano RS505 hydroShimano BR-785
HandlebarCannondale C3Specialized Expert
StemCannondale C3Specialized Pro SL
Bar tapeCannondale TapeSpecialized CX Pro
HeadsetSynapse Sinot listed
SeatpostCannondale C3Specialized CG-R
SaddleSelle Royal Seta S1Specialized Phenom Expert
Wheelsetnot listedFulcrum S-19

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