Compare: 2025 TanTan Cycling (Seraph) TT-X70 Base 490 vs 2023 Onirii ONE Base 47

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	514mm	514mm +0mm
Reach	375mm	375.3mm +0.3mm
Stack to Reach Ratio	1.37:1	1.37:1
Seat Tube Length, C-T	446mm	431mm -15mm
Top Tube Length, Effective/Horizontal Center	508mm	508mm +0mm
Top Tube Slope	9.6deg	11.3deg +1.7deg
Head Tube Angle	71.75deg	71.8deg +0.05deg
Seat Tube Angle	75.5deg	75.5deg +0deg
Head Tube Length	109mm	110mm +1mm
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	575mm	575mm +0mm
Front-Center Horizontal	569.7mm	570.2mm +0.5mm
Wheelbase	973mm	973.5mm +0.5mm
Fork Offset/Rake	47.2mm	47mm -0.2mm
Fork Length, Unknown	—	370mm
Trail	62.1mm mid/neutral	62mm -0.1mm mid/neutral
Mechanical Trail	59mm	58.9mm -0.1mm
Wheel Flop	18.5mm	18.4mm -0.1mm
Tire to Pedal Spindle	66mm 170 mm cranks	66mm +0mm 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	1651mm	1651.5mm +0.5mm
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	490	47
Category	Performance Road	Endurance Road