Compare: 2021 DENGFU R06 Disc Base 54cm vs 2025 TanTan Cycling (Seraph) TT-X65 Base M

Insights

Somewhat aggressive stack and reach vs trend of performance road bikes

Design deviates from other sizes of DENGFU R06 Disc

Average stack and reach vs trend of performance road bikes

Stack	523.7mm	524mm +0.3mm
Reach	384.8mm	377mm -7.8mm
Stack to Reach Ratio	1.36:1	1.39:1
Seat Tube Length, C-T	—	500mm
Seat Tube Length, C-TTT	520mm	—
Top Tube Length, Effective/Horizontal HT Top	535mm	527mm -8mm
Top Tube Slope	0.5deg	4.8deg +4.3deg
Head Tube Angle	72.5deg	71.5deg -1deg
Seat Tube Angle	74deg	74deg +0deg
Head Tube Length	140mm	120mm -20mm
Bottom Bracket Drop	69mm	72mm +3mm
Bottom Bracket Height	270mm	269mm -1mm
Chainstay Length	405mm	408mm +3mm
Chainstay Length Horizontal	399.1mm	401.6mm +2.5mm
Front-Center	579.5mm	580mm +0.5mm
Front-Center Horizontal	575.4mm	576.4mm +1mm
Wheelbase	974.5mm	978mm +3.5mm
Fork Offset/Rake	45mm	45mm +0mm
Fork Length, Unknown	370mm	371mm +1mm
Trail	59.7mm mid/neutral	66.6mm +6.9mm high
Mechanical Trail	56.9mm	63.2mm +6.3mm
Wheel Flop	17.1mm	20.1mm +3mm
Standover Height	—	773mm
Tire to Pedal Spindle	70.5mm 170 mm cranks	69mm -1.5mm 170 mm cranks
Pedal Spindle to Ground Clearance	100mm 170 mm cranks	99mm -1mm 170 mm cranks

Wheel Size	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD
Tire Width	28mm	30mm +2mm
Tire Outer Diameter	678mm	682mm +4mm
Bike Length with Tires	1652.5mm	1660mm +7.5mm
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	Disc

Actions	Collection I've Ridden	Collection I've Ridden
Source	https://www.dengfubike.com/collections/carbon-bike-frame/products/r06-frame?variant=28857691668585	http://tantancycling.com/index.php?_m=mod_product&_a=view&p_id=1185
Brand	DENGFU	TanTan Cycling (Seraph)
Bike	2021 R06 Disc Base	2025 TT-X65 Base
Size	54cm	M
Category	Performance Road	Performance Road