Compare: 2026 XDS X-LAB RT9 Base M vs 2027 Specialized Bicycles Tarmac SL9 S-Works 54

Insights

Average stack and reach vs trend of performance road bikes

Design deviates from other sizes of XDS X-LAB RT9

Average stack and reach vs trend of performance road bikes

Design deviates from other sizes of Specialized Bicycles Tarmac SL9

Stack	543mm	544mm +1mm
Reach	384mm	384mm +0mm
Stack to Reach Ratio	1.41:1	1.42:1
Seat Tube Length, C-T	480mm	—
Seat Tube Length, C-TTT	—	473mm
Top Tube Length, Effective/Horizontal Center	—	540mm
Top Tube Length, Effective/Horizontal Unknown	540mm	—
Top Tube Slope	9deg	7.7deg -1.3deg
Head Tube Angle	73deg	72.5deg -0.5deg
Seat Tube Angle	74deg	74deg +0deg
Head Tube Length	137mm	139.7mm +2.7mm
Bottom Bracket Drop	72mm	72mm +0mm
Bottom Bracket Height	267mm	271mm +4mm
Chainstay Length	410mm	410mm +0mm
Chainstay Length Horizontal	403.6mm	403.6mm +0mm
Front-Center	578mm	587mm +9mm
Front-Center Horizontal	574.4mm	582.4mm +8mm
Wheelbase	978mm	986mm +8mm
Fork Offset/Rake	44.4mm	47mm +2.6mm
Fork Length (Axle-To-Crown)	—	369mm
Trail	57.3mm mid/neutral	58.9mm +1.6mm mid/neutral
Mechanical Trail	54.8mm	56.1mm +1.3mm
Wheel Flop	16mm	16.9mm +0.9mm
Standover Height	750mm	767mm +17mm
Tire to Pedal Spindle	69mm 170 mm cranks	71.5mm +2.5mm 172.5 mm cranks
Pedal Spindle to Ground Clearance	97mm 170 mm cranks	98.5mm +1.5mm 172.5 mm cranks

Wheel Size	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD
Tire Width	28mm	32mm +4mm
Tire Outer Diameter	678mm	686mm +8mm
Bike Length with Tires	1656mm	1672mm +16mm
Crank Length	—	172.5mm
Handlebar Width	—	420mm
Stem Length	—	100mm
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