2004 Trek Bikes 520 Base

	17	19	21	23	25
Stack	530.5mm	530.5mm	530.5mm	562.7mm	607.4mm
Reach	390mm	392mm	400mm	396.7mm	397.4mm
Stack to Reach Ratio	1.36:1	1.35:1	1.33:1	1.42:1	1.53:1
Seat Tube Length, Unknown	432mm	483mm	533mm	584mm	635mm
Top Tube Length, Effective/Horizontal Unknown	540mm	545mm	555mm	566mm	590mm
Head Tube Angle	71deg	71deg	71deg	72deg	72.5deg
Seat Tube Angle	74deg	74deg	73.5deg	73deg	72deg
Head Tube Length	90mm	90mm	90mm	120mm	165mm
Bottom Bracket Drop	78mm	78mm	78mm	78mm	78mm
Bottom Bracket Height	268mm	268mm	268mm	268mm	268mm
Chainstay Length	450mm	450mm	450mm	450mm	450mm
Chainstay Length Horizontal	443.2mm	443.2mm	443.2mm	443.2mm	443.2mm
Front-Center	605.9mm	607.8mm	615.8mm	613.8mm	623.7mm
Front-Center Horizontal	600.8mm	602.8mm	610.8mm	608.8mm	618.8mm
Wheelbase	1044mm	1046mm	1054mm	1052mm	1062mm
Fork Offset/Rake	52mm	52mm	52mm	52mm	52mm
Fork Length (Axle-To-Crown)	390mm	390mm	390mm	390mm	390mm
Trail	64.1mm mid/neutral	64.1mm mid/neutral	64.1mm mid/neutral	57.8mm mid/neutral	54.6mm mid/neutral
Mechanical Trail	60.7mm	60.7mm	60.7mm	54.9mm	52mm
Wheel Flop	19.7mm	19.7mm	19.7mm	17mm	15.7mm
Standover Height	697mm	727mm	764mm	806mm	852mm
Tire to Pedal Spindle	89.9mm 170 mm cranks	91.8mm 170 mm cranks	99.8mm 170 mm cranks	92.8mm 175 mm cranks	102.7mm 175 mm cranks
Pedal Spindle to Ground Clearance	98mm 170 mm cranks	98mm 170 mm cranks	98mm 170 mm cranks	93mm 175 mm cranks	93mm 175 mm cranks

Published Sizing Recommendations

Height

169 cm

175 cm

178 cm

181 cm

190 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.

Category Trend

Source:2004 Trek Specifications Manual- U.S.