2025 3T Cycling Primo2 Base

	S	M	L	XL
Stack	517mm	546mm	575mm	604mm
Reach	366mm	378mm	390mm	402mm
Stack to Reach Ratio	1.41:1	1.44:1	1.47:1	1.5:1
Seat Tube Length, C-T	463mm	490mm	518mm	54mm
Top Tube Length, Actual C-C	529mm	550mm	571mm	592mm
Top Tube Slope	8.5deg	8.5deg	8.4deg	52.9deg
Head Tube Angle	69.5deg	71.1deg	72.5deg	72.5deg
Seat Tube Angle	72.5deg	72.5deg	72.5deg	72.5deg
Head Tube Length	101mm	125mm	150mm	180mm
Bottom Bracket Drop	70mm	70mm	70mm	70mm
Bottom Bracket Height	273mm	272mm	281mm	276mm
Chainstay Length	415mm	415mm	415mm	415mm
Chainstay Length Horizontal	409.1mm	409.1mm	409.1mm	409.1mm
Front-Center	591mm	598mm	606mm	627mm
Front-Center Horizontal	587mm	594mm	602mm	623mm
Wheelbase	996mm	1003mm	1011mm	1032mm
Fork Offset/Rake	50.4mm	50.1mm	50.3mm	50.1mm
Trail	74.4mm high	64.1mm mid/neutral	58mm mid/neutral	56.5mm mid/neutral
Mechanical Trail	69.7mm	60.7mm	55.3mm	53.9mm
Wheel Flop	24.4mm	19.7mm	16.6mm	16.2mm
Tire to Pedal Spindle	78mm 170 mm cranks	86mm 170 mm cranks	85mm 170 mm cranks	111mm 170 mm cranks
Pedal Spindle to Ground Clearance	103mm 170 mm cranks	102mm 170 mm cranks	111mm 170 mm cranks	106mm 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://us.3t.bike/collections/primo-2-wpnt

Geometry