2019 Bombtrack Bicycle Company Needle Base

	S	M	L	XL
Stack	502mm	536mm	563mm	589mm
Reach	386mm	405mm	417mm	429mm
Stack to Reach Ratio	1.3:1	1.32:1	1.35:1	1.37:1
Seat Tube Length, C-T	500mm	530mm	560mm	590mm
Top Tube Length, Effective/Horizontal HT Top	525mm	559mm	579mm	598mm
Top Tube Slope	2.2deg	2.8deg	2.5deg	2.1deg
Head Tube Angle	72.8deg	73deg	73.2deg	73.2deg
Seat Tube Angle	74.5deg	74deg	74deg	74deg
Head Tube Length	105mm	140mm	168mm	195mm
Bottom Bracket Drop	51.5mm	51.5mm	51.5mm	51.5mm
Bottom Bracket Height	284.5mm	284.5mm	284.5mm	284.5mm
Chainstay Length	392mm	392mm	392mm	392mm
Chainstay Length Horizontal	388.6mm	388.6mm	388.6mm	388.6mm
Front-Center	574.7mm	602.6mm	621.5mm	640.5mm
Front-Center Horizontal	572.4mm	600.4mm	619.4mm	638.4mm
Wheelbase	961mm	989mm	1008mm	1027mm
Fork Offset/Rake	45mm	45mm	45mm	45mm
Trail	56.9mm mid/neutral	55.7mm mid/neutral	54.4mm mid/neutral	54.4mm mid/neutral
Mechanical Trail	54.4mm	53.2mm	52.1mm	52.1mm
Wheel Flop	16.1mm	15.6mm	15.1mm	15.1mm
Standover Height	764mm	795mm	821mm	851mm
Tire to Pedal Spindle	73.7mm 165 mm cranks	101.6mm 165 mm cranks	120.5mm 165 mm cranks	139.5mm 165 mm cranks
Pedal Spindle to Ground Clearance	119.5mm 165 mm cranks	119.5mm 165 mm cranks	119.5mm 165 mm cranks	119.5mm 165 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/needle-2-2/

Geometry