2021 Breezer Bikes Thunder Base

	S/15	M/17	L/19	XL/20.5
Stack	610mm	609mm	627mm	632mm
Reach	421mm	441mm	455mm	484mm
Stack to Reach Ratio	1.45:1	1.38:1	1.38:1	1.31:1
Seat Tube Length, C-T	370mm	420mm	470mm	521mm
Top Tube Length, Effective/Horizontal Center	585mm	610mm	635mm	666mm
Top Tube Slope	26.1deg	20.3deg	16.7deg	11.8deg
Head Tube Angle	67.7deg	67.7deg	67.7deg	67.7deg
Seat Tube Angle	75deg	74.5deg	74deg	74deg
Head Tube Length	100mm	100mm	120mm	130mm
Bottom Bracket Drop	72mm	70mm	70mm	70mm
Bottom Bracket Height	305mm	307mm	307mm	307mm
Chainstay Length	450mm	450mm	450mm	450mm
Chainstay Length Horizontal	444.2mm	444.5mm	444.5mm	444.5mm
Front-Center	695.5mm	720.9mm	735.8mm	767.7mm
Front-Center Horizontal	691.8mm	717.5mm	732.5mm	764.5mm
Wheelbase	1136mm	1162mm	1177mm	1209mm
Fork Offset/Rake	46mm	46mm	46mm	46mm
Trail	104.9mm very high	104.9mm very high	104.9mm very high	104.9mm very high
Mechanical Trail	97.1mm	97.1mm	97.1mm	97.1mm
Wheel Flop	36.8mm	36.8mm	36.8mm	36.8mm
Standover Height	765.5mm	785.5mm	811.5mm	839.3mm
Tire to Pedal Spindle	148.5mm 170 mm cranks	168.8mm 175 mm cranks	183.8mm 175 mm cranks	215.6mm 175 mm cranks
Pedal Spindle to Ground Clearance	135mm 170 mm cranks	132mm 175 mm cranks	132mm 175 mm cranks	132mm 175 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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Source:https://www.breezerbikes.com/bikes/adventure/thunder/thunder

Geometry