Compare: 2025 TanTan Cycling (Seraph) TT-X70 Base 560 vs 2023 Onirii ONE Base 56

Insights

Average stack and reach vs trend of performance road bikes

Design deviates from other sizes of TanTan Cycling (Seraph) TT-X70

Somewhat aggressive stack and reach vs trend of endurance road bikes

Design deviates from other sizes of Onirii ONE

Stack	565mm	567mm +2mm
Reach	395mm	394mm -1mm
Stack to Reach Ratio	1.43:1	1.44:1
Seat Tube Length, C-T	495mm	500mm +5mm
Top Tube Length, Effective/Horizontal Center	562mm	562mm +0mm
Top Tube Slope	9.6deg	9.3deg -0.3deg
Head Tube Angle	73.5deg	73.5deg +0deg
Seat Tube Angle	73.5deg	73.5deg +0deg
Head Tube Length	157mm	157mm +0mm
Bottom Bracket Drop	74mm	74mm +0mm
Bottom Bracket Height	265mm	265mm +0mm
Chainstay Length	410mm	410mm +0mm
Chainstay Length Horizontal	403.3mm	403.3mm +0mm
Front-Center	595mm	594mm -1mm
Front-Center Horizontal	589.7mm	589.4mm -0.3mm
Wheelbase	993mm	992.6mm -0.4mm
Fork Offset/Rake	47.3mm	47mm -0.3mm
Fork Length, Unknown	—	370mm
Trail	51.1mm mid/neutral	51.4mm +0.3mm mid/neutral
Mechanical Trail	49mm	49.3mm +0.3mm
Wheel Flop	13.9mm	14mm +0.1mm
Tire to Pedal Spindle	86mm 170 mm cranks	85mm -1mm 170 mm cranks
Pedal Spindle to Ground Clearance	95mm 170 mm cranks	95mm +0mm 170 mm cranks

Wheel Size	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD
Tire Width	28mm	28mm +0mm
Tire Outer Diameter	678mm	678mm +0mm
Bike Length with Tires	1671mm	1670.6mm -0.4mm
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	Unknown

Actions	Collection I've Ridden	Collection I've Ridden
Source	https://www.seraphbikes.com/Superlight-Internal-Cable-Carbon-Fiber-Road-Bike-Frame-TT-X70-Disc-Brake-BSA-Bottom-Bracket-UDH-Hanger-p6452343.html	http://www.oniriibike.com/page336?_l=en
Brand	TanTan Cycling (Seraph)	Onirii
Bike	2025 TT-X70 Base	2023 ONE Base
Size	560	56
Category	Performance Road	Endurance Road