Compare: 2023 Orbea Orca Aero M31 eLTD 57 vs 2023 TanTan Cycling (Seraph) TT-X38 Base 56

Insights

Average stack and reach vs trend of performance road bikes

Design deviates from other sizes of Orbea Orca Aero

Average stack and reach vs trend of performance road bikes

Design deviates from other sizes of TanTan Cycling (Seraph) TT-X38

Stack	580mm	575mm -5mm
Reach	398mm	394mm -4mm
Stack to Reach Ratio	1.46:1	1.46:1
Seat Tube Length, C-T	564mm	560mm -4mm
Top Tube Length, Effective/Horizontal Center	573.1mm	566mm -7.1mm
Top Tube Slope	4.1deg	4deg -0.1deg
Head Tube Angle	73.2deg	73deg -0.2deg
Seat Tube Angle	73.2deg	73.3deg +0.1deg
Head Tube Length	173.2mm	170mm -3.2mm
Bottom Bracket Drop	74mm	70mm -4mm
Bottom Bracket Height	262mm	269mm +7mm
Chainstay Length	408mm	410mm +2mm
Chainstay Length Horizontal	401.2mm	404mm +2.8mm
Front-Center	600.3mm	600mm -0.3mm
Front-Center Horizontal	595.7mm	595.9mm +0.2mm
Wheelbase	996.9mm	999.9mm +3mm
Fork Offset/Rake	43mm	45mm +2mm
Fork Length (Axle-To-Crown)	370mm	—
Trail	56.6mm mid/neutral	56.6mm +0mm mid/neutral
Mechanical Trail	54.1mm	54.1mm +0mm
Wheel Flop	15.7mm	15.8mm +0.1mm
Standover Height	811.6mm	—
Tire to Pedal Spindle	94.3mm 170 mm cranks	91mm -3.3mm 170 mm cranks
Pedal Spindle to Ground Clearance	92mm 170 mm cranks	99mm +7mm 170 mm cranks

Wheel Size	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD
Tire Width	25mm	28mm +3mm
Tire Outer Diameter	672mm	678mm +6mm
Bike Length with Tires	1668.9mm	1677.9mm +9mm
Suspension Type	Rigid, non-suspension corrected	Rigid, non-suspension corrected
Bar Type	Drop Bar	Drop Bar
Frame Material	Carbon/Composite	Carbon/Composite
Fork Material	Carbon/Composite	Carbon/Composite
Brake Type	Disc	Disc

Actions	Collection I've Ridden	Collection I've Ridden
Source	https://www.orbea.com/gb-en/bicicletas/carretera/orca-aero/cat/orca-aero-m31eltd-pwr-2023#geometry-and-sizes	N/A
Brand	Orbea	TanTan Cycling (Seraph)
Bike	2023 Orca Aero M31 eLTD	2023 TT-X38 Base
Size	57	56
Category	Performance Road	Performance Road