2018 Bearclaw Bicycle Co. Frank Base

	S	M	L	XL
Stack	595mm	627.5mm	646.4mm	665.2mm
Reach	392.6mm	407.9mm	431.9mm	456.2mm
Stack to Reach Ratio	1.52:1	1.54:1	1.5:1	1.46:1
Seat Tube Length, C-C	381mm	381mm	381mm	530mm
Top Tube Length, Effective/Horizontal Center	570mm	600.2mm	630mm	660mm
Head Tube Angle	69.5deg	70.5deg	70.5deg	70.5deg
Seat Tube Angle	73.5deg	73deg	73deg	73deg
Head Tube Length	100mm	130mm	150mm	170mm
Bottom Bracket Drop	60mm	60mm	60mm	60mm
Bottom Bracket Height	319.5mm	319.5mm	319.5mm	319.5mm
Chainstay Length	463mm	463mm	463mm	463mm
Chainstay Length Horizontal	459.1mm	459.1mm	459.1mm	459.1mm
Front-Center	643.5mm	659.3mm	689.9mm	720.8mm
Front-Center Horizontal	640.7mm	656.6mm	687.3mm	718.3mm
Wheelbase	1099.8mm	1115.7mm	1146.4mm	1177.4mm
Fork Offset/Rake	45mm	45mm	45mm	45mm
Fork Length (On-Axis)	468mm	468mm	468mm	468mm
Trail	93.9mm very high	86.7mm very high	86.7mm very high	86.7mm very high
Mechanical Trail	87.9mm	81.7mm	81.7mm	81.7mm
Wheel Flop	30.8mm	27.3mm	27.3mm	27.3mm
Tire to Pedal Spindle	99mm 165 mm cranks	109.8mm 170 mm cranks	140.4mm 170 mm cranks	171.3mm 170 mm cranks
Pedal Spindle to Ground Clearance	154.5mm 165 mm cranks	149.5mm 170 mm cranks	149.5mm 170 mm cranks	149.5mm 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

Source:https://bearclawbicycleco.com/frank-titanium-fat-bike/

Geometry