Compare: 2025 Yoeleo R12 Disc 50 vs 2023 TanTan Cycling (Seraph) TT-X34 Base XS / 50

Insights

Average stack and reach vs trend of performance road bikes

Design deviates from other sizes of TanTan Cycling (Seraph) TT-X34

Stack	520.9mm	521mm +0.1mm
Reach	378.6mm	377mm -1.6mm
Stack to Reach Ratio	1.38:1	1.38:1
Seat Tube Length, C-T	—	453mm
Seat Tube Length, Unknown	470mm	—
Top Tube Length, Effective/Horizontal HT Top	—	521mm
Top Tube Length, Actual C-C	528mm	—
Top Tube Slope	7.7deg	9.6deg +1.9deg
Head Tube Angle	72deg	72.1deg +0.1deg
Seat Tube Angle	74deg	74.6deg +0.6deg
Head Tube Length	115mm	111mm -4mm
Bottom Bracket Drop	72mm	72mm +0mm
Bottom Bracket Height	271mm	269mm -2mm
Chainstay Length	415mm	410mm -5mm
Chainstay Length Horizontal	408.7mm	403.6mm -5.1mm
Front-Center	574.2mm	574mm -0.2mm
Front-Center Horizontal	569.6mm	569.5mm -0.1mm
Wheelbase	978.3mm	973.1mm -5.2mm
Fork Offset/Rake	43mm	45mm +2mm
Fork Length, Unknown	371mm	—
Trail	66.2mm high	62.9mm -3.3mm mid/neutral
Mechanical Trail	63mm	59.8mm -3.2mm
Wheel Flop	19.5mm	18.4mm -1.1mm
Tire to Pedal Spindle	61.2mm 170 mm cranks	63mm +1.8mm 170 mm cranks
Pedal Spindle to Ground Clearance	101mm 170 mm cranks	99mm -2mm 170 mm cranks

Wheel Size	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD
Tire Width	32mm	30mm -2mm
Tire Outer Diameter	686mm	682mm -4mm
Bike Length with Tires	1664.3mm	1655.1mm -9.2mm
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.yoeleobike.com/products/r12-db-chuan?variant=51133165142297	http://tantancycling.com/index.php?_m=mod_product&_a=view&p_id=1043
Brand	Yoeleo	TanTan Cycling (Seraph)
Bike	2025 R12 Disc	2023 TT-X34 Base
Size	50	XS / 50
Category	Performance Road	Performance Road