Name: 2026 Oak Marca Base
Brand: Oak

	XS	S	M	L	XL
Stack	534.4mm	550.5mm	570mm	588.9mm	615.8mm
Reach	372mm	382mm	390mm	400mm	415mm
Stack to Reach Ratio	1.44:1	1.44:1	1.46:1	1.47:1	1.48:1
Seat Tube Length, C-C	470mm	500mm	530mm	560mm	590mm
Top Tube Length, Actual C-C	520.2mm	534.6mm	553.4mm	568.9mm	597.4mm
Head Tube Angle	72deg	72.5deg	73deg	73.5deg	73.5deg
Seat Tube Angle	74.5deg	74.5deg	74deg	74deg	73.5deg
Head Tube Length	121mm	136mm	154mm	172mm	200mm
Bottom Bracket Drop	72mm	72mm	72mm	72mm	72mm
Bottom Bracket Height	269mm	269mm	269mm	269mm	269mm
Chainstay Length	410mm	410mm	410mm	410mm	410mm
Chainstay Length Horizontal	403.6mm	403.6mm	403.6mm	403.6mm	403.6mm
Front-Center	576.2mm	586.5mm	593.7mm	604.3mm	627.1mm
Front-Center Horizontal	571.7mm	582.2mm	589.3mm	600.1mm	623mm
Wheelbase	975.3mm	985.8mm	992.9mm	1003.7mm	1026.6mm
Fork Offset/Rake	47mm	47mm	45mm	45mm	45mm
Fork Length (Axle-To-Crown)	379.5mm	379.5mm	379.5mm	379.5mm	379.5mm
Trail	61.4mm mid/neutral	58.2mm mid/neutral	57.2mm mid/neutral	54.1mm mid/neutral	54.1mm mid/neutral
Mechanical Trail	58.4mm	55.5mm	54.7mm	51.9mm	51.9mm
Wheel Flop	18mm	16.7mm	16mm	14.7mm	14.7mm
Tire to Pedal Spindle	75.2mm 160 mm cranks	80.5mm 165 mm cranks	87.7mm 165 mm cranks	93.3mm 170 mm cranks	116.1mm 170 mm cranks
Pedal Spindle to Ground Clearance	109mm 160 mm cranks	104mm 165 mm cranks	104mm 165 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.

Category Trend

Source:oak.cc

2026 Oak Marca Base

Geometry