Quiver

2021 Specialized Aethos Pro vs 2023 Trek Émonda SLR Disc Frameset

The 62 is the Trek Émonda SLR Disc Frameset size closest to your 61 Specialized Aethos Pro. We match frame stack and reach. This is a geometry comparison, not a fit recommendation; stem, spacers, handlebars and saddle setup also affect your riding position.

What changes on the Trek Émonda SLR Disc Frameset

Compared with the Specialized Aethos Pro in 61, the Trek Émonda SLR Disc Frameset in 62 places the top of the head tube 8 mm higher and 5 mm further back, relative to the bottom bracket.

Frame stack
+8 mm
Higher front end
Frame reach
−5 mm
Shorter frame reach
Wheelbase
−2 mm
About the same
Head angle
−0.1°
About the same head angle
Chainstays
+2 mm
About the same

The two frames

2021 Specialized Aethos Pro (61)The Specialized Aethos Pro frame drawn to scale.J 1012

Only the Specialized Aethos Pro is drawn. The Trek Émonda SLR Disc Frameset numbers we have for size 62 are missing the seat angle.

Geometry side by side

MeasurementSpecialized Aethos Pro 61Trek Émonda SLR Disc Frameset 62Difference
Reach408mm403−5 mm
Stack612mm620+8 mm
Head tube angle74°73.9°−0.1°
Seat tube angle73°not listed
Chainstay length410mm412+2 mm
Wheelbase1012mm1010−2 mm
BB drop72mm68−4 mm
BB height268mmnot listed
Standover824mm829+5 mm
Seat tube length567mm593+26 mm
Fork length369mmnot listed
Head tube length204mm211+7 mm
Effective top tubenot listed598

Differences are the Trek Émonda SLR Disc Frameset minus the Specialized Aethos Pro. Full charts: 2021 Specialized Aethos Pro, 2023 Trek Émonda SLR Disc Frameset.

Where each sits in its class

Specialized Aethos ProTrek Émonda SLR Disc Frameset

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.

PartSpecialized Aethos ProProTrek Émonda SLR Disc FramesetSLR Disc Frameset
FrameSpecialized Aethos FACTTrek Ultralight 800
DerailleurSRAM Force eTAP AXSTrek derailleurs must have
CassetteSRAM XG-1270not listed
ChainSRAM Forcenot listed
CranksetSRAM FC Force DUBnot listed
Bottom bracketSRAM DUBnot listed
WheelsetRoval Alpinist CLnot listed
TireSpecialized S-Works Turbonot listed
BrakeSRAM Force eTAPnot listed
SeatpostRoval Alpinistnot listed
SaddleSpecialized Powernot listed
Forknot listedTrek Emonda SLR

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