Compare: 2026/v2 XDS X-LAB GT8 Base S vs 2025 Giant Bicycles Revolt Base XS

Insights

Average stack and reach vs trend of progressive gravel bikes

Design deviates from other sizes of XDS X-LAB GT8

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

Design deviates from other sizes of Giant Bicycles Revolt

Stack	540mm	556mm +16mm
Reach	379mm	381mm +2mm
Stack to Reach Ratio	1.42:1	1.46:1
Seat Tube Length, C-T	447mm	—
Seat Tube Length, Unknown	—	430mm
Top Tube Length, Effective/Horizontal HT Top	525mm	—
Top Tube Length, Unknown	—	540mm
Top Tube Slope	12.3deg	15.9deg +3.6deg
Head Tube Angle	70deg	70deg +0deg
Seat Tube Angle	75deg	74deg -1deg
Head Tube Length	100mm	125mm +25mm
Bottom Bracket Drop	80mm	81mm +1mm
Bottom Bracket Height	276mm	272mm -4mm
Chainstay Length	435mm	440mm +5mm
Chainstay Length Horizontal	427.6mm	432.5mm +4.9mm
Front-Center	610mm	611.9mm +1.9mm
Front-Center Horizontal	604.4mm	606.5mm +2.1mm
Wheelbase	1032mm	1039mm +7mm
Fork Offset/Rake	54.5mm	50mm -4.5mm
Trail	71.6mm high	75.3mm +3.7mm high
Mechanical Trail	67.3mm	70.7mm +3.4mm
Wheel Flop	23mm	24.2mm +1.2mm
Standover Height	730mm	724mm -6mm
Tire to Pedal Spindle	84mm 170 mm cranks	88.9mm +4.9mm 170 mm cranks
Pedal Spindle to Ground Clearance	106mm 170 mm cranks	102mm -4mm 170 mm cranks

Wheel Size	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD
Tire Width	45mm	42mm -3mm
Tire Outer Diameter	712mm	706mm -6mm
Bike Length with Tires	1744mm	1745mm +1mm
Crank Length	—	170mm
Handlebar Width	—	420mm
Stem Length	—	50mm
Suspension Type	Rigid, non-suspension corrected	Rigid, non-suspension corrected
Bar Type	Drop Bar	Drop Bar
Frame Material	Carbon/Composite	Aluminum
Fork Material	Carbon/Composite	Carbon/Composite
Brake Type	Disc	Disc

Actions	Collection I've Ridden	Collection I've Ridden
Source	https://xds.co/en-us/products/gt8#product-geometry	Giant
Brand	XDS X-LAB	Giant Bicycles
Bike	2026/v2 GT8 Base	2025 Revolt Base
Size	S	XS
Category	Progressive Gravel	All-road/Gravel