2018-2019 Trek Bikes FX 3

	M	S	L	XL	XXL
Stack	555mm	541mm	589mm	621mm	650mm
Reach	389mm	394mm	394mm	400mm	392mm
Stack to Reach Ratio	1.43:1	1.37:1	1.49:1	1.55:1	1.66:1
Seat Tube Length, C-T	444mm	381mm	508mm	571mm	635mm
Top Tube Length, Effective/Horizontal HT Top	548mm	544mm	568mm	590mm	603mm
Top Tube Slope	14.1deg	19.3deg	10.7deg	7.5deg	4.5deg
Head Tube Angle	70.5deg	70.5deg	71.5deg	72.5deg	72.5deg
Seat Tube Angle	74deg	74.5deg	73.5deg	73deg	72deg
Head Tube Length	130mm	115mm	160mm	190mm	220mm
Bottom Bracket Drop	62mm	62mm	62mm	62mm	62mm
Bottom Bracket Height	281mm	281mm	281mm	281mm	281mm
Chainstay Length	445mm	445mm	445mm	445mm	445mm
Chainstay Length Horizontal	440.7mm	440.7mm	440.7mm	440.7mm	440.7mm
Front-Center	619.5mm	619.5mm	620.5mm	626.4mm	627.4mm
Front-Center Horizontal	616.3mm	616.3mm	617.3mm	623.3mm	624.3mm
Wheelbase	1057mm	1057mm	1058mm	1064mm	1065mm
Fork Offset/Rake	50mm	50mm	45mm	45mm	45mm
Trail	68.4mm high	68.4mm high	67.3mm high	61mm mid/neutral	61mm mid/neutral
Mechanical Trail	64.5mm	64.5mm	63.8mm	58.1mm	58.1mm
Wheel Flop	21.5mm	21.5mm	20.3mm	17.5mm	17.5mm
Standover Height	735mm	693mm	783mm	831mm	877mm
Tire to Pedal Spindle	106.5mm 170 mm cranks	106.5mm 170 mm cranks	107.5mm 170 mm cranks	113.4mm 170 mm cranks	114.4mm 170 mm cranks
Pedal Spindle to Ground Clearance	111mm 170 mm cranks	111mm 170 mm cranks	111mm 170 mm cranks	111mm 170 mm cranks	111mm 170 mm cranks

Published Sizing Recommendations

Height	165 cm to 175 cm	155 cm to 165 cm	175 cm to 186 cm	186 cm to 197 cm	197 cm to 203 cm
PBH	77 cm to 83 cm	72 cm to 78 cm	82 cm to 88 cm	87 cm to 93 cm	92 cm to 95 cm

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.

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Source:https://www.trekbikes.com/us/en_US/bikes/hybrid-bikes/fitness-bikes/fx/fx-3/p/17482/