	24W	15	16.5	18T	18	20	22
Stack	394.2mm	363.4mm	399.7mm	440.7mm	434.9mm	483.4mm	529.2mm
Reach	345.9mm	414.5mm	423.1mm	415.1mm	423.4mm	415.7mm	411.1mm
Stack to Reach Ratio	1.14:1	0.88:1	0.94:1	1.06:1	1.03:1	1.16:1	1.29:1
Seat Tube Length, C-T	419mm	381mm	419mm	462mm	457mm	508mm	556mm
Top Tube Length, Effective/Horizontal Center	490mm	531mm	551mm	556mm	566mm	574mm	584mm
Top Tube Length, Actual C-C	490mm	531mm	551mm	556mm	566mm	574mm	584mm
Top Tube Slope	0deg	0deg	0deg	0deg	0deg	0deg	0deg
Head Tube Angle	69deg	69.5deg	69.5deg	69.5deg	70deg	70deg	70.5deg
Seat Tube Angle	70deg	72.5deg	72.5deg	72.5deg	72deg	72deg	72deg
Bottom Bracket Drop	29mm	37mm	37mm	37mm	34mm	34mm	32mm
Bottom Bracket Height	274mm	292mm	292mm	292mm	295mm	295mm	297mm
Chainstay Length	422mm	437mm	429mm	437mm	429mm	429mm	429mm
Chainstay Length Horizontal	421mm	435.4mm	427.4mm	435.4mm	427.7mm	427.7mm	427.8mm
Front-Center	562.8mm	632.7mm	640.7mm	632.7mm	640.3mm	640.3mm	650mm
Front-Center Horizontal	562mm	631.6mm	639.6mm	631.6mm	639.4mm	639.4mm	649.2mm
Wheelbase	983mm	1067mm	1067mm	1067mm	1067mm	1067mm	1077mm
Fork Offset/Rake	51mm	51mm	51mm	51mm	51mm	51mm	51mm
Trail	61.7mm mid/neutral	68.6mm high	68.6mm high	68.6mm high	65.5mm high	65.5mm high	62.4mm mid/neutral
Mechanical Trail	57.6mm	64.2mm	64.2mm	64.2mm	61.5mm	61.5mm	58.8mm
Wheel Flop	20.6mm	22.5mm	22.5mm	22.5mm	21.1mm	21.1mm	19.6mm
Tire to Pedal Spindle	89.7mm 170 mm cranks	133.6mm 170 mm cranks	141.6mm 170 mm cranks	133.6mm 170 mm cranks	141.2mm 170 mm cranks	141.2mm 170 mm cranks	151mm 170 mm cranks
Pedal Spindle to Ground Clearance	104mm 170 mm cranks	122mm 170 mm cranks	122mm 170 mm cranks	122mm 170 mm cranks	125mm 170 mm cranks	125mm 170 mm cranks	127mm 170 mm cranks

	24W	15	16.5	18T	18	20	22
Wheel Size	24 in 507 mm BSD	26 in 559 mm BSD	26 in 559 mm BSD	26 in 559 mm BSD	26 in 559 mm BSD	26 in 559 mm BSD	26 in 559 mm BSD
Tire Width	1.95in	1.95in	1.95in	1.95in	1.95in	1.95in	1.95in
Tire Outer Diameter	606.1mm	658.1mm	658.1mm	658.1mm	658.1mm	658.1mm	658.1mm
Bike Length with Tires	1589.1mm	1725.1mm	1725.1mm	1725.1mm	1725.1mm	1725.1mm	1735.1mm

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.

Learn more about the Upright/Aggressive Scale

Category Trend

Rigid MTB

Source:https://www.retrobike.co.uk/archive/1989-trek-dealer-information.1638/download

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Geometry

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Stack and Reach vs. Category Trend