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

Insights

Average stack and reach vs trend of performance road bikes

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

Average stack and reach vs trend of performance road bikes

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

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