2015 Bombtrack Bicycle Company Needle Base

	Small	Medium	Large
Stack	508mm	525mm	553mm
Reach	380mm	400mm	420mm
Stack to Reach Ratio	1.34:1	1.31:1	1.32:1
Seat Tube Length, C-T	530mm	550mm	580mm
Top Tube Length, Effective/Horizontal Center	512mm	541mm	574mm
Top Tube Slope	-0.6deg	-0.7deg	-0.6deg
Head Tube Angle	74deg	74.2deg	74.5deg
Seat Tube Angle	75.5deg	75deg	74.5deg
Head Tube Length	103mm	120mm	148mm
Bottom Bracket Drop	54mm	54mm	54mm
Bottom Bracket Height	280mm	280mm	280mm
Chainstay Length	397mm	397mm	397mm
Chainstay Length Horizontal	393.3mm	393.3mm	393.3mm
Front-Center	549.4mm	572.2mm	597.1mm
Front-Center Horizontal	546.7mm	569.7mm	594.7mm
Wheelbase	940mm	963mm	988mm
Fork Offset/Rake	35mm	35mm	35mm
Trail	59.4mm mid/neutral	58.1mm mid/neutral	56.3mm mid/neutral
Mechanical Trail	57.1mm	55.9mm	54.3mm
Wheel Flop	15.7mm	15.2mm	14.5mm
Standover Height	781mm	800mm	828mm
Tire to Pedal Spindle	50.4mm 165 mm cranks	68.2mm 170 mm cranks	93.1mm 170 mm cranks
Pedal Spindle to Ground Clearance	115mm 165 mm cranks	110mm 170 mm cranks	110mm 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:http://bombtrack.com/wp-content/uploads/2015/02/bt_completebike_geometrie_table_2015.pdf

Geometry