2019 Koski Bros. Bro Bomber Frameset

	16.5	19.5	21.5
Stack	549mm	563mm	576mm
Reach	452mm	488mm	505mm
Stack to Reach Ratio	1.21:1	1.15:1	1.14:1
Seat Tube Length, C-T	419mm	495mm	546mm
Top Tube Length, Effective/Horizontal Unknown	610mm	650mm	670mm
Top Tube Slope	14.5deg	8deg	4.5deg
Head Tube Angle	67deg	67deg	67deg
Seat Tube Angle	74deg	74deg	74deg
Head Tube Length	105mm	120mm	135mm
Bottom Bracket Drop	50mm	50mm	50mm
Bottom Bracket Height	313.1mm	313.1mm	313.1mm
Chainstay Length	432mm	432mm	432mm
Chainstay Length Horizontal	429.1mm	429.1mm	429.1mm
Front-Center	722mm	764mm	785mm
Front-Center Horizontal	712.9mm	755.9mm	776.9mm
Wheelbase	1142mm	1185mm	1206mm
Fork Offset/Rake	45.2mm	46.2mm	44.8mm
Fork Length, Unknown	465mm	465mm	465mm
Trail	105mm very high	104mm very high	105.5mm very high
Mechanical Trail	96.7mm	95.7mm	97.1mm
Wheel Flop	37.8mm	37.4mm	38mm
Tire to Pedal Spindle	188.9mm 170 mm cranks	230.9mm 170 mm cranks	251.9mm 170 mm cranks
Pedal Spindle to Ground Clearance	143.1mm 170 mm cranks	143.1mm 170 mm cranks	143.1mm 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.somafabshop.com/shop/product/koski-bros-frameset-bro-bomber-white-2219

Geometry