Quiver

2021 Giant Defy Advanced Pro vs 2023 Specialized Roubaix SL8 Comp

The Specialized Roubaix SL8 Comp size closest to your L is the 56. Compare the 56 instead

What changes on the Specialized Roubaix SL8 Comp

Compared with the Giant Defy Advanced Pro in L, the Specialized Roubaix SL8 Comp in 64 places the top of the head tube 80 mm higher and 19 mm further forward, relative to the bottom bracket.

Frame stack
+80 mm
Higher front end
Frame reach
+19 mm
Longer frame reach
Wheelbase
n/a
One of the bikes has no number for this
Head angle
n/a
One of the bikes has no number for this
Chainstays
n/a
One of the bikes has no number for this

The two frames

We can't draw these frames yet. The Giant Defy Advanced Pro numbers we have for size L are missing the head angle, seat angle, chainstay length and wheelbase. The numbers below still compare.

Geometry side by side

MeasurementGiant Defy Advanced Pro LSpecialized Roubaix SL8 Comp 64Difference
Reach390409+19 mm
Stack605685+80 mm
Head tube anglenot listed73.5
Seat tube anglenot listed73
Effective top tubenot listed618
Chainstay lengthnot listed423
Wheelbasenot listed1054
BB heightnot listed271
Standovernot listed865
Seat tube lengthnot listed581
Head tube lengthnot listed222

Differences are the Specialized Roubaix SL8 Comp minus the Giant Defy Advanced Pro. Full charts: 2021 Giant Defy Advanced Pro, 2023 Specialized Roubaix SL8 Comp.

Where each sits in its class

Giant Defy Advanced ProSpecialized Roubaix SL8 Comp

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.

PartGiant Defy Advanced ProAdvanced Pro 2Specialized Roubaix SL8 CompSL8 Comp
FrameGiant DefySpecialized FACT 10R
ForkGiant OverDrive 2Specialized Future Shock 3.2
ShifterShimano UltegraShimano 105
DerailleurShimano UltegraShimano 105
CassetteShimano cassetteShimano 105
ChainKMC X11SL-1Shimano 105
CranksetShimano Ultegra Mid CompactShimano 105
WheelsetGiant SLR-2 42DT Swiss G540
TireGiant Gavia Fondo 1S Works Mondo, S Works Mondo 2BR
BrakeShimano UltegraShimano 105
HandlebarGiant D-Fuse SLRSpecialized Hover
StemGiant Contact SLSpecialized Future Stem
SeatpostGiant D-Fuse SLRSpecialized S-Works Pavé
SaddleGiant Contact Fleet SLSpecialized Body Geometry Power Sport
Chainringnot listedShimano 105
Bottom bracketnot listedShimano 105
Rotornot listedShimano 105
Bar tapenot listedSupacaz Super Sticky Kush

Know what is on every bike.

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