Name: 2025 Avec Sythe Base
Brand: Avec

	X Small (49cm)	Small (52cm)	Medium (54cm)	Large (56cm)	X Large (58cm)
Stack	514mm	527mm	547mm	568mm	592mm
Reach	373mm	378mm	384mm	392mm	404mm
Stack to Reach Ratio	1.38:1	1.39:1	1.42:1	1.45:1	1.47:1
Seat Tube Length, C-T	460mm	480mm	495mm	520mm	540mm
Top Tube Length, Effective/Horizontal Center	511mm	529mm	541mm	560mm	585mm
Top Tube Slope	8deg	7.3deg	7.8deg	7.3deg	7.6deg
Head Tube Angle	71.5deg	72.5deg	73deg	73.5deg	73.5deg
Seat Tube Angle	75.5deg	74deg	74deg	73.5deg	73.5deg
Head Tube Length	105mm	115mm	135mm	155mm	180mm
Bottom Bracket Drop	72mm	72mm	72mm	72mm	72mm
Bottom Bracket Height	269mm	269mm	269mm	269mm	269mm
Chainstay Length	406mm	406mm	406mm	406mm	406mm
Chainstay Length Horizontal	399.6mm	399.6mm	399.6mm	399.6mm	399.6mm
Front-Center	573mm	573mm	581mm	590mm	609mm
Front-Center Horizontal	568.4mm	568.4mm	576.4mm	585.4mm	605.4mm
Wheelbase	968mm	968mm	976mm	985mm	1005mm
Fork Offset/Rake	45mm	45mm	45mm	45mm	45mm
Trail	66.6mm high	60.3mm mid/neutral	57.2mm mid/neutral	54.1mm mid/neutral	54.1mm mid/neutral
Mechanical Trail	63.2mm	57.5mm	54.7mm	51.9mm	51.9mm
Wheel Flop	20.1mm	17.3mm	16mm	14.7mm	14.7mm
Tire to Pedal Spindle	62mm 170 mm cranks	62mm 170 mm cranks	70mm 170 mm cranks	79mm 170 mm cranks	98mm 170 mm cranks
Pedal Spindle to Ground Clearance	99mm 170 mm cranks	99mm 170 mm cranks	99mm 170 mm cranks	99mm 170 mm cranks	99mm 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.

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2025 Avec Sythe Base

Geometry