2021 GT Bicycles Grade Carbon (70mm Offset)

	48	51	55	58	61
Stack	546mm	568mm	590mm	612mm	634mm
Reach	378mm	385mm	394mm	400mm	408mm
Stack to Reach Ratio	1.44:1	1.48:1	1.5:1	1.53:1	1.55:1
Seat Tube Length, C-T	457mm	494mm	531mm	568mm	605mm
Top Tube Length, Effective/Horizontal HT Top	545mm	559mm	574mm	587mm	602mm
Top Tube Slope	12deg	10.2deg	8.5deg	6.9deg	5.4deg
Head Tube Angle	70.5deg	70.5deg	72.3deg	72.3deg	72.3deg
Seat Tube Angle	73deg	73deg	73deg	73deg	73deg
Head Tube Length	119mm	145mm	162mm	187mm	210mm
Bottom Bracket Drop	75mm	73mm	73mm	70mm	70mm
Bottom Bracket Height	276mm	278mm	278mm	281mm	281mm
Chainstay Length	430mm	430mm	430mm	430mm	430mm
Chainstay Length Horizontal	423.4mm	423.8mm	423.8mm	424.3mm	424.3mm
Front-Center	608mm	623mm	623mm	635mm	650mm
Front-Center Horizontal	603.6mm	619.2mm	619.2mm	630.7mm	645.7mm
Wheelbase	1027mm	1043mm	1043mm	1055mm	1070mm
Fork Offset/Rake	70mm	70mm	70mm	70mm	70mm
Trail	50mm mid/neutral	50mm mid/neutral	38.5mm low	38.5mm low	38.5mm low
Mechanical Trail	47.2mm	47.2mm	36.7mm	36.7mm	36.7mm
Wheel Flop	15.7mm	15.7mm	11.2mm	11.2mm	11.2mm
Standover Height	731mm	760mm	791mm	824mm	851mm
Tire to Pedal Spindle	87mm 170 mm cranks	102mm 170 mm cranks	102mm 170 mm cranks	114mm 170 mm cranks	129mm 170 mm cranks
Pedal Spindle to Ground Clearance	106mm 170 mm cranks	108mm 170 mm cranks	108mm 170 mm cranks	111mm 170 mm cranks	111mm 170 mm cranks

Very Upright

Somewhat Upright

Average

Somewhat Aggressive

Very Aggressive

The Bike Insights Upright/Aggressive scale is based on analysis of a bike’s proportions relative to similar sized bikes in the same category.

Category Trend

Source:https://www.gtbicycles.com/gbr_en/grade-carbon-elite-3080

Geometry