Compare: 2022 Serk Titanium A21 650b wheels S vs 2022 TanTan Cycling (Seraph) GR047 Base S

Insights

Somewhat upright stack and reach vs trend of all-road/gravel bikes

Design deviates from other sizes of Serk Titanium A21

Average stack and reach vs trend of all-road/gravel bikes

Design deviates from other sizes of TanTan Cycling (Seraph) GR047

Stack	548mm	556mm +8mm
Reach	364mm	372mm +8mm
Stack to Reach Ratio	1.51:1	1.49:1
Seat Tube Length, C-T	485mm	430mm -55mm
Top Tube Length, Effective/Horizontal HT Top	523mm	528mm +5mm
Top Tube Slope	9.3deg	16.2deg +6.9deg
Head Tube Angle	70deg	70.5deg +0.5deg
Seat Tube Angle	74deg	74.3deg +0.3deg
Head Tube Length	110mm	125mm +15mm
Bottom Bracket Drop	75mm	76mm +1mm
Bottom Bracket Height	264mm	280mm +16mm
Chainstay Length	430mm	430mm +0mm
Chainstay Length Horizontal	423.4mm	423.2mm -0.2mm
Front-Center	589mm	600mm +11mm
Front-Center Horizontal	584.6mm	595.2mm +10.6mm
Wheelbase	1008mm	1018.4mm +10.4mm
Fork Offset/Rake	45mm	50mm +5mm
Trail	75.5mm high	73mm -2.5mm high
Mechanical Trail	70.9mm	68.8mm -2.1mm
Wheel Flop	24.3mm	23mm -1.3mm
Tire to Pedal Spindle	80mm 170 mm cranks	74mm -6mm 170 mm cranks
Pedal Spindle to Ground Clearance	94mm 170 mm cranks	110mm +16mm 170 mm cranks

Wheel Size	650B/27.5 in 584 mm BSD	700C/29 in 622 mm BSD
Tire Width	47mm	45mm -2mm
Tire Outer Diameter	678mm	712mm +34mm
Bike Length with Tires	1686mm	1730.4mm +44.4mm
Crank Length	—	170mm
Handlebar Width	—	420mm
Stem Length	—	100mm
Suspension Type	Rigid, non-suspension corrected	Rigid, non-suspension corrected
Bar Type	Drop Bar	Drop Bar
Frame Material	Titanium	Carbon/Composite
Fork Material	Carbon/Composite	Carbon/Composite
Brake Type	Disc	Disc

Actions	Collection I've Ridden	Collection I've Ridden
Source	https://www.serk.cc/a21/	https://www.seraphbikes.com/flat-mount-gravel-bike-frame-gr047-full-hidden-cable-t47-threaded-bottom-bracket-4043464953cm-p4814109.html
Brand	Serk Titanium	TanTan Cycling (Seraph)
Bike	2022 A21 650b wheels	2022 GR047 Base
Size	S	S
Category	All-road/Gravel	All-road/Gravel