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

Insights

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

Design deviates from other sizes of Giant Bicycles Revolt

Very upright stack and reach vs trend of progressive gravel bikes

Design deviates from other sizes of XDS X-LAB GT8

Stack	616mm	607mm -9mm
Reach	397mm	399mm +2mm
Stack to Reach Ratio	1.55:1	1.52:1
Seat Tube Length, C-T	—	532mm
Seat Tube Length, Unknown	510mm	—
Top Tube Length, Effective/Horizontal HT Top	—	585mm
Top Tube Length, Unknown	585mm	—
Top Tube Slope	13.2deg	10.1deg -3.1deg
Head Tube Angle	72deg	71deg -1deg
Seat Tube Angle	73deg	73deg +0deg
Head Tube Length	180mm	165mm -15mm
Bottom Bracket Drop	81mm	80mm -1mm
Bottom Bracket Height	272mm	276mm +4mm
Chainstay Length	440mm	435mm -5mm
Chainstay Length Horizontal	432.5mm	427.6mm -4.9mm
Front-Center	627.8mm	638mm +10.2mm
Front-Center Horizontal	622.5mm	633.4mm +10.9mm
Wheelbase	1055mm	1061mm +6mm
Fork Offset/Rake	50mm	50.1mm +0.1mm
Trail	62.1mm mid/neutral	69.6mm +7.5mm high
Mechanical Trail	59.1mm	65.8mm +6.7mm
Wheel Flop	18.3mm	21.4mm +3.1mm
Standover Height	793mm	807mm +14mm
Tire to Pedal Spindle	99.8mm 175 mm cranks	112mm +12.2mm 170 mm cranks
Pedal Spindle to Ground Clearance	97mm 175 mm cranks	106mm +9mm 170 mm cranks

Wheel Size	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD
Tire Width	42mm	45mm +3mm
Tire Outer Diameter	706mm	712mm +6mm
Bike Length with Tires	1761mm	1773mm +12mm
Crank Length	175mm	—
Handlebar Width	460mm	—
Stem Length	80mm	—
Suspension Type	Rigid, non-suspension corrected	Rigid, non-suspension corrected
Bar Type	Drop Bar	Drop Bar
Frame Material	Aluminum	Carbon/Composite
Fork Material	Carbon/Composite	Carbon/Composite
Brake Type	Disc	Disc

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