2021 Bearclaw Bicycle Co. Frank Base

	S	M	L	XL
Stack	593mm	611.3mm	625.5mm	639.6mm
Reach	394.9mm	414.1mm	439.4mm	465mm
Stack to Reach Ratio	1.5:1	1.48:1	1.42:1	1.38:1
Seat Tube Length, Unknown	381mm	440mm	480mm	530mm
Top Tube Length, Effective/Horizontal Unknown	570mm	600.2mm	630mm	660mm
Top Tube Slope	24.4deg	19.3deg	16deg	12.1deg
Head Tube Angle	69.5deg	70.5deg	70.5deg	70.5deg
Seat Tube Angle	73.5deg	73deg	73deg	73deg
Head Tube Length	120mm	135mm	150mm	170mm
Bottom Bracket Drop	60mm	60mm	60mm	60mm
Bottom Bracket Height	341.4mm	341.4mm	341.4mm	341.4mm
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, Unknown	468mm	468mm	468mm	468mm
Trail	102mm very high	94.4mm very high	94.4mm very high	94.4mm very high
Mechanical Trail	95.6mm	89mm	89mm	89mm
Wheel Flop	33.5mm	29.7mm	29.7mm	29.7mm
Tire to Pedal Spindle	77.1mm 165 mm cranks	87.9mm 170 mm cranks	118.5mm 170 mm cranks	149.4mm 170 mm cranks
Pedal Spindle to Ground Clearance	176.4mm 165 mm cranks	171.4mm 170 mm cranks	171.4mm 170 mm cranks	171.4mm 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