Compare: 2026 BMC Switzerland Teammachine SLR 01 ONE Frame 54 vs 2023 TanTan Cycling (Seraph) TT-X38 Base 54

Insights

Average stack and reach vs trend of performance road bikes

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

Stack	550mm	554mm +4mm
Reach	386mm	388mm +2mm
Stack to Reach Ratio	1.42:1	1.43:1
Seat Tube Length, C-T	491mm	540mm +49mm
Top Tube Length, Effective/Horizontal Center	—	551mm
Top Tube Length, Actual C-C	552mm	—
Top Tube Slope	8.6deg	3.8deg -4.8deg
Head Tube Angle	72.3deg	72.5deg +0.2deg
Seat Tube Angle	73.5deg	73.6deg +0.1deg
Head Tube Length	149mm	150mm +1mm
Bottom Bracket Drop	69mm	70mm +1mm
Bottom Bracket Height	272mm	269mm -3mm
Chainstay Length	410mm	410mm +0mm
Chainstay Length Horizontal	404.2mm	404mm -0.2mm
Front-Center	589mm	592mm +3mm
Front-Center Horizontal	584.9mm	587.9mm +3mm
Wheelbase	989mm	991.8mm +2.8mm
Fork Offset/Rake	43mm	45mm +2mm
Fork Length (On-Axis)	369mm	—
Trail	63.7mm mid/neutral	59.7mm -4mm mid/neutral
Mechanical Trail	60.7mm	56.9mm -3.8mm
Wheel Flop	18.5mm	17.1mm -1.4mm
Standover Height	779mm	—
Tire to Pedal Spindle	75.5mm 172.5 mm cranks	83mm +7.5mm 170 mm cranks
Pedal Spindle to Ground Clearance	99.5mm 172.5 mm cranks	99mm -0.5mm 170 mm cranks

Wheel Size	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD
Tire Width	30mm	28mm -2mm
Tire Width Max	—	32mm
Tire Outer Diameter	682mm	678mm -4mm
Bike Length with Tires	1671mm	1669.8mm -1.2mm
Crank Length	172.5mm	—
Handlebar Width	400436mm	—
Stem Length	100mm	—
Stem Angle	-12deg	—
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