2021 Trek Bikes 520 Disc Base

	48 cm	51 cm	54 cm	57 cm	60 cm	63 cm
Stack	540mm	551mm	565mm	587mm	625mm	655mm
Reach	368mm	373mm	378mm	383mm	392mm	400mm
Stack to Reach Ratio	1.47:1	1.48:1	1.49:1	1.53:1	1.59:1	1.64:1
Seat Tube Length, C-T	440mm	482mm	512mm	543mm	575mm	605mm
Top Tube Length, Effective/Horizontal HT Top	520mm	531mm	543mm	557mm	583mm	603mm
Top Tube Slope	13.4deg	9.8deg	8deg	7deg	7.6deg	7.6deg
Head Tube Angle	69.5deg	70deg	71deg	71.8deg	71.8deg	72.3deg
Seat Tube Angle	74.3deg	74deg	73.8deg	73.5deg	73deg	72.8deg
Head Tube Length	115mm	125mm	140mm	160mm	200mm	230mm
Bottom Bracket Drop	75mm	75mm	70mm	70mm	70mm	70mm
Bottom Bracket Height	274mm	274mm	279mm	279mm	279mm	279mm
Chainstay Length	450mm	450mm	450mm	450mm	450mm	450mm
Chainstay Length Horizontal	443.7mm	443.7mm	444.5mm	444.5mm	444.5mm	444.5mm
Front-Center	602mm	606mm	607.5mm	611.5mm	633.4mm	645.3mm
Front-Center Horizontal	597.3mm	601.3mm	603.5mm	607.5mm	629.5mm	641.5mm
Wheelbase	1041mm	1045mm	1048mm	1052mm	1074mm	1086mm
Fork Offset/Rake	52mm	52mm	52mm	52mm	52mm	52mm
Trail	75mm high	71.7mm high	65.2mm high	60mm mid/neutral	60mm mid/neutral	56.8mm mid/neutral
Mechanical Trail	70.2mm	67.4mm	61.6mm	57mm	57mm	54.1mm
Wheel Flop	24.6mm	23mm	20.1mm	17.8mm	17.8mm	16.5mm
Standover Height	713mm	741mm	768mm	794mm	826mm	854mm
Tire to Pedal Spindle	83mm 170 mm cranks	87mm 170 mm cranks	83.5mm 175 mm cranks	87.5mm 175 mm cranks	109.4mm 175 mm cranks	121.3mm 175 mm cranks
Pedal Spindle to Ground Clearance	104mm 170 mm cranks	104mm 170 mm cranks	104mm 175 mm cranks	104mm 175 mm cranks	104mm 175 mm cranks	104mm 175 mm cranks

	48 cm	51 cm	54 cm	57 cm	60 cm	63 cm
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
Tire Width	38mm	38mm	38mm	38mm	38mm	38mm
Tire Width Max	50mm	50mm	50mm	50mm	50mm	50mm
Tire Outer Diameter	698mm	698mm	698mm	698mm	698mm	698mm
Bike Length with Tires	1739mm	1743mm	1746mm	1750mm	1772mm	1784mm
Crank Length	170mm	170mm	175mm	175mm	175mm	175mm
Handlebar Width	40cm	42cm	42cm	44cm	44cm	44cm
Stem Length	80mm	90mm	100mm	100mm	110mm	110mm
Stem Angle	7deg	7deg	7deg	7deg	7deg	7deg

Published Sizing Recommendations

Height	158 cm to 163 cm	162 cm to 168 cm	167 cm to 174 cm	173 cm to 180 cm	184 cm to 191 cm	190 cm to 197 cm
PBH	74 in to 77 in	76 in to 79 in	78 in to 82 in	81 in to 85 in	86 in to 90 in	89 in to 93 in

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/adventure-touring-bikes/520/520-disc/p/24000/