	S	M	L	XL
Stack	624mm	624mm	638mm	651mm
Reach	431mm	460mm	485mm	510mm
Stack to Reach Ratio	1.45:1	1.36:1	1.32:1	1.28:1
Seat Tube Length, Effective Unknown	370mm	400mm	420mm	455mm
Top Tube Length, Effective/Horizontal Center	559mm	589mm	613mm	651mm
Head Tube Angle	64.6deg	64.5deg	64.5deg	64.5deg
Seat Tube Angle	72.7deg	72.6deg	72.6deg	72.6deg
Effective Seat Tube Angle, Unknown	78.2deg	77.8deg	77.3deg	76.9deg
Head Tube Length	110mm	110mm	125mm	140mm
Bottom Bracket Drop	34mm	35mm	35mm	35mm
Bottom Bracket Height	340.5mm	339.5mm	339.5mm	339.5mm
Chainstay Length	441mm	444mm	444mm	447mm
Chainstay Length Horizontal	439.7mm	442.6mm	442.6mm	445.6mm
Front-Center	761mm	791mm	822mm	854mm
Front-Center Horizontal	760.3mm	789.4mm	815.4mm	852.4mm
Wheelbase	1200mm	1232mm	1258mm	1298mm
Fork Offset/Rake	44mm	44mm	44mm	44mm
Fork Length (Axle-To-Crown)	533mm	533mm	533mm	533mm
Trail	129.1mm very high	129.9mm very high	129.9mm very high	129.9mm very high
Mechanical Trail	116.6mm	117.2mm	117.2mm	117.2mm
Wheel Flop	50mm	50.5mm	50.5mm	50.5mm
Standover Height	754mm	747mm	750mm	755mm
Tire to Pedal Spindle	216.5mm 170 mm cranks	246.5mm 170 mm cranks	277.5mm 170 mm cranks	309.5mm 170 mm cranks
Pedal Spindle to Ground Clearance	170.5mm 170 mm cranks	169.5mm 170 mm cranks	169.5mm 170 mm cranks	169.5mm 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

2026 Trek Bikes Fuel+ EX 9.7 Gen2

Geometry