Compare: 2023 TanTan Cycling (Seraph) TT-X38 Base 56 vs 2025 Quick Pro ER:ONE Base 550 (XL 58CM)

Insights

Average stack and reach vs trend of performance road bikes

Design deviates from other sizes of TanTan Cycling (Seraph) TT-X38

Somewhat aggressive stack and reach vs trend of performance road bikes

Design deviates from other sizes of Quick Pro ER:ONE

Stack	575mm	572mm -3mm
Reach	394mm	406mm +12mm
Stack to Reach Ratio	1.46:1	1.41:1
Seat Tube Length, C-T	560mm	550mm -10mm
Top Tube Length, Effective/Horizontal Center	566mm	—
Top Tube Length, Effective/Horizontal HT Top	—	575mm
Top Tube Slope	4deg	4.5deg +0.5deg
Head Tube Angle	73deg	73deg +0deg
Seat Tube Angle	73.3deg	73.5deg +0.2deg
Head Tube Length	170mm	165mm -5mm
Bottom Bracket Drop	70mm	70mm +0mm
Bottom Bracket Height	269mm	271mm +2mm
Chainstay Length	410mm	408mm -2mm
Chainstay Length Horizontal	404mm	402mm -2mm
Front-Center	600mm	610.1mm +10.1mm
Front-Center Horizontal	595.9mm	606.1mm +10.2mm
Wheelbase	999.9mm	1008mm +8.1mm
Fork Offset/Rake	45mm	45mm +0mm
Fork Length, Unknown	—	373mm
Trail	56.6mm mid/neutral	57.2mm +0.6mm mid/neutral
Mechanical Trail	54.1mm	54.7mm +0.6mm
Wheel Flop	15.8mm	16mm +0.2mm
Standover Height	—	813mm
Tire to Pedal Spindle	91mm 170 mm cranks	99.1mm +8.1mm 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	28mm	30mm +2mm
Tire Outer Diameter	678mm	682mm +4mm
Bike Length with Tires	1677.9mm	1690mm +12.1mm
Suspension Type	Rigid, non-suspension corrected	Rigid, non-suspension corrected
Bar Type	Drop Bar	Drop Bar
Frame Material	Carbon/Composite	Unknown
Fork Material	Carbon/Composite	Unknown
Brake Type	Disc	Unknown

Actions	Collection I've Ridden	Collection I've Ridden
Source	N/A	https://www.pandapodium.cc/product/quick-pro-erone-aero-road-bike-frameset
Brand	TanTan Cycling (Seraph)	Quick Pro
Bike	2023 TT-X38 Base	2025 ER:ONE Base
Size	56	550 (XL 58CM)
Category	Performance Road	Performance Road