2026 Trek Bikes Roscoe 8 Gen 4

	S	M	ML	L	XL
Stack	604mm	644mm	648mm	662mm	684mm
Reach	415mm	440mm	455mm	470mm	500mm
Stack to Reach Ratio	1.46:1	1.46:1	1.42:1	1.41:1	1.37:1
Seat Tube Length, C-T	330mm	375mm	400mm	425mm	450mm
Top Tube Length, Effective/Horizontal Center	575mm	611mm	614mm	632mm	655mm
Top Tube Slope	29.4deg	27.5deg	25deg	23.4deg	22deg
Head Tube Angle	65deg	65deg	65deg	65deg	65deg
Seat Tube Angle	73.1deg	73.1deg	74.1deg	74.1deg	75.1deg
Seat Tube Exit Angle	75deg	75deg	76deg	76deg	77deg
Head Tube Length	90mm	100mm	105mm	120mm	145mm
Bottom Bracket Drop	45mm	61mm	61mm	61mm	61mm
Bottom Bracket Height	308mm	311mm	311mm	311mm	311mm
Chainstay Length	425mm	430mm	430mm	430mm	430mm
Chainstay Length Horizontal	422.6mm	425.7mm	425.7mm	425.7mm	425.7mm
Front-Center	717.8mm	762.8mm	779.7mm	800.7mm	841.6mm
Front-Center Horizontal	716.4mm	760.4mm	777.4mm	798.4mm	839.4mm
Wheelbase	1139mm	1186mm	1203mm	1224mm	1265mm
Fork Offset/Rake	37mm	44mm	44mm	44mm	44mm
Trail	123.8mm very high	124.9mm very high	124.9mm very high	124.9mm very high	124.9mm very high
Mechanical Trail	112.2mm	113.2mm	113.2mm	113.2mm	113.2mm
Wheel Flop	47.4mm	47.8mm	47.8mm	47.8mm	47.8mm
Standover Height	714mm	735mm	740mm	740mm	740mm
Tire to Pedal Spindle	194.8mm 170 mm cranks	220.8mm 170 mm cranks	237.8mm 170 mm cranks	258.7mm 170 mm cranks	299.6mm 170 mm cranks
Pedal Spindle to Ground Clearance	138mm 170 mm cranks	141mm 170 mm cranks	141mm 170 mm cranks	141mm 170 mm cranks	141mm 170 mm cranks

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:https://www.trekbikes.com/us/en_US/bikes/mountain-bikes/trail-mountain-bikes/roscoe/f/F342/roscoe-8-gen-4/59872/5341548

Geometry