2025 Basic Cycle Co Road Bike Base

	49	52	55	58	61
Stack	527mm	549mm	575mm	595mm	618mm
Reach	340mm	362mm	384mm	404mm	410mm
Stack to Reach Ratio	1.55:1	1.52:1	1.5:1	1.47:1	1.51:1
Seat Tube Length, C-T	485mm	510mm	535mm	560mm	590mm
Top Tube Length, Effective/Horizontal Center	490mm	520mm	555mm	580mm	600mm
Top Tube Slope	7.3deg	6.7deg	6.6deg	5.9deg	5.3deg
Head Tube Angle	71.5deg	72.5deg	73deg	73deg	73deg
Seat Tube Angle	74.25deg	74deg	73.5deg	73.5deg	73deg
Head Tube Length	110mm	130mm	155mm	175mm	200mm
Bottom Bracket Drop	70mm	70mm	70mm	70mm	70mm
Bottom Bracket Height	273mm	273mm	273mm	273mm	273mm
Chainstay Length	415mm	415mm	415mm	415mm	415mm
Chainstay Length Horizontal	409.1mm	409.1mm	409.1mm	409.1mm	409.1mm
Front-Center	544.9mm	564.6mm	589.6mm	615.6mm	628.5mm
Front-Center Horizontal	540.4mm	560.2mm	585.5mm	611.6mm	624.6mm
Wheelbase	949.4mm	969.3mm	994.5mm	1020.6mm	1033.7mm
Fork Offset/Rake	45mm	45mm	45mm	45mm	45mm
Fork Length (Axle-To-Crown)	375mm	375mm	375mm	375mm	375mm
Trail	67.3mm high	61mm mid/neutral	57.8mm mid/neutral	57.8mm mid/neutral	57.8mm mid/neutral
Mechanical Trail	63.8mm	58.1mm	55.3mm	55.3mm	55.3mm
Wheel Flop	20.3mm	17.5mm	16.2mm	16.2mm	16.2mm
Tire to Pedal Spindle	31.9mm 170 mm cranks	51.6mm 170 mm cranks	76.6mm 170 mm cranks	102.6mm 170 mm cranks	115.5mm 170 mm cranks
Pedal Spindle to Ground Clearance	103mm 170 mm cranks	103mm 170 mm cranks	103mm 170 mm cranks	103mm 170 mm cranks	103mm 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.basiccycle.co/road-bike-1, basiccycle.com/road-bike

Geometry