	XS	S	M	L	XL	XS	S	M	L	XL
Stack	58.3mm	59mm	60.2mm	60.6mm	62.9mm	583mm	590mm	602mm	606mm	629mm
Reach	41mm	42.5mm	45mm	47mm	49.5mm	410mm	425mm	450mm	470mm	495mm
Stack to Reach Ratio	1.42:1	1.39:1	1.34:1	1.29:1	1.27:1	1.42:1	1.39:1	1.34:1	1.29:1	1.27:1
Seat Tube Length, C-T	35.5mm	39.4mm	42mm	46mm	50.5mm	355mm	394mm	420mm	460mm	505mm
Top Tube Length, Effective/Horizontal Unknown	57.4mm	59.1mm	61.9mm	64mm	67.2mm	574mm	591mm	619mm	640mm	672mm
Top Tube Slope	25.6deg	21.7deg	19.4deg	15.4deg	12.7deg	25.6deg	21.7deg	19.4deg	15.4deg	12.7deg
Head Tube Angle	66deg	66deg	66deg	66deg	66deg	66deg	66deg	66deg	66deg	66deg
Seat Tube Angle	75deg	75deg	75deg	75deg	75deg	75deg	75deg	75deg	75deg	75deg
Head Tube Length	8.5mm	9.2mm	10.5mm	11mm	13.5mm	85mm	92mm	105mm	110mm	135mm
Bottom Bracket Drop	3.8mm	3.8mm	3.8mm	3.8mm	3.8mm	38mm	38mm	38mm	38mm	38mm
Bottom Bracket Height	368.2mm	368.2mm	368.2mm	368.2mm	368.2mm	334mm	334mm	334mm	334mm	334mm
Chainstay Length	43.2mm	43.2mm	43.2mm	43.2mm	43.2mm	432mm	432mm	432mm	432mm	432mm
Chainstay Length Horizontal	43mm	43mm	43mm	43mm	43mm	430.3mm	430.3mm	430.3mm	430.3mm	430.3mm
Front-Center	70.2mm	72mm	75mm	77.2mm	80.7mm	701.7mm	719.7mm	749.6mm	771.6mm	806.6mm
Front-Center Horizontal	70.1mm	71.9mm	74.9mm	77.1mm	80.6mm	700.7mm	718.7mm	748.7mm	770.7mm	805.7mm
Wheelbase	113.1mm	114.9mm	117.9mm	120.1mm	123.6mm	1131mm	1149mm	1179mm	1201mm	1236mm
Fork Offset/Rake	4.4mm	4.4mm	4.4mm	4.4mm	4.3mm	43.9mm	43.8mm	43.5mm	43.7mm	43.4mm
Trail	160.8mm very high	160.8mm very high	160.9mm very high	160.8mm very high	160.9mm very high	117.6mm very high	117.7mm very high	118mm very high	117.8mm very high	118.1mm very high
Mechanical Trail	146.9mm	146.9mm	146.9mm	146.9mm	147mm	107.4mm	107.5mm	107.8mm	107.6mm	107.9mm
Wheel Flop	59.8mm	59.8mm	59.8mm	59.8mm	59.8mm	43.7mm	43.7mm	43.9mm	43.8mm	43.9mm
Standover Height	64.1mm	65.5mm	68.7mm	68.6mm	69.9mm	641mm	655mm	687mm	686mm	699mm
Tire to Pedal Spindle	-471.8mm 170 mm cranks	-470mm 170 mm cranks	-467mm 170 mm cranks	-464.8mm 170 mm cranks	-461.3mm 170 mm cranks	159.7mm 170 mm cranks	177.7mm 170 mm cranks	207.7mm 170 mm cranks	229.7mm 170 mm cranks	264.6mm 170 mm cranks
Pedal Spindle to Ground Clearance	198.2mm 170 mm cranks	198.2mm 170 mm cranks	198.2mm 170 mm cranks	198.2mm 170 mm cranks	198.2mm 170 mm cranks	164mm 170 mm cranks	164mm 170 mm cranks	164mm 170 mm cranks	164mm 170 mm cranks	164mm 170 mm cranks

	XS	S	M	L	XL	XS	S	M	L	XL
Wheel Size	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD
Tire Width	2.4in	2.4in	2.4in	2.4in	2.4in	2.4in	2.4in	2.4in	2.4in	2.4in
Tire Outer Diameter	743.9mm	743.9mm	743.9mm	743.9mm	743.9mm	743.9mm	743.9mm	743.9mm	743.9mm	743.9mm
Bike Length with Tires	857mm	858.8mm	861.8mm	864mm	867.5mm	1874.9mm	1892.9mm	1922.9mm	1944.9mm	1979.9mm

Very Upright

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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.

Learn more about the Upright/Aggressive Scale

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Full-suspension Cross-country MTB

Source:https://www.pivotcycles.com/en-us/bikes/mach-4-sl

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