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

Insights

Average stack and reach vs trend of performance road bikes

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

Average stack and reach vs trend of performance road bikes

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

Wheel Size	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD
Tire Width	28mm	30mm +2mm
Tire Width Max	32mm	—
Tire Outer Diameter	678mm	682mm +4mm
Bike Length with Tires	1669.8mm	1671mm +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