2020 GT Bicycles Grade Carbon Pro (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	273mm	275mm	275mm	278mm	278mm
Chainstay Length	430mm	430mm	430mm	430mm	430mm
Chainstay Length Horizontal	423.4mm	423.8mm	423.8mm	424.3mm	424.3mm
Front-Center	623.6mm	638.7mm	636.7mm	650.2mm	665.2mm
Front-Center Horizontal	619.1mm	634.6mm	632.5mm	646.5mm	661.5mm
Wheelbase	1042.5mm	1058.3mm	1056.2mm	1070.7mm	1085.7mm
Fork Offset/Rake	70mm	70mm	70mm	70mm	70mm
Trail	49mm mid/neutral	49mm mid/neutral	37.6mm low	37.6mm low	37.6mm low
Mechanical Trail	46.2mm	46.2mm	35.8mm	35.8mm	35.8mm
Wheel Flop	15.4mm	15.4mm	10.9mm	10.9mm	10.9mm
Standover Height	731mm	760mm	791mm	824mm	851mm
Tire to Pedal Spindle	105.6mm 170 mm cranks	120.7mm 170 mm cranks	118.7mm 170 mm cranks	132.2mm 170 mm cranks	147.2mm 170 mm cranks
Pedal Spindle to Ground Clearance	103mm 170 mm cranks	105mm 170 mm cranks	105mm 170 mm cranks	108mm 170 mm cranks	108mm 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/int_en/grade-carbon-pro-2006

Geometry