2013 Niner Bikes ROS 9 Base

	Small	Medium	Large	XLarge
Stack	632mm	641mm	655mm	674mm
Reach	386mm	400mm	415mm	428mm
Stack to Reach Ratio	1.64:1	1.6:1	1.58:1	1.57:1
Seat Tube Length, Unknown	394mm	431mm	471mm	534mm
Top Tube Length, Effective/Horizontal Unknown	581mm	598mm	617mm	636mm
Top Tube Slope	27deg	23.5deg	20.3deg	15.6deg
Head Tube Angle	67deg	67deg	67deg	67deg
Seat Tube Angle	73deg	73deg	73deg	73deg
Head Tube Length	100mm	110mm	125mm	145mm
Bottom Bracket Drop	49mm	49mm	49mm	49mm
Bottom Bracket Height	321.7mm	321.7mm	321.7mm	321.7mm
Chainstay Length	427mm	427mm	427mm	427mm
Chainstay Length Horizontal	424.2mm	424.2mm	424.2mm	424.2mm
Front-Center	683mm	701mm	722mm	743mm
Front-Center Horizontal	680.8mm	698.8mm	719.8mm	740.8mm
Wheelbase	1105mm	1123mm	1144mm	1165mm
Fork Offset/Rake	43.6mm	43.8mm	43.8mm	43.8mm
Trail	110mm very high	109.8mm very high	109.8mm very high	109.8mm very high
Mechanical Trail	101.3mm	101.1mm	101mm	101.1mm
Wheel Flop	39.6mm	39.5mm	39.5mm	39.5mm
Standover Height	712mm	733mm	787mm	839mm
Tire to Pedal Spindle	142.3mm 170 mm cranks	160.3mm 170 mm cranks	181.3mm 170 mm cranks	202.3mm 170 mm cranks
Pedal Spindle to Ground Clearance	151.7mm 170 mm cranks	151.7mm 170 mm cranks	151.7mm 170 mm cranks	151.7mm 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:Niner Encyclopedia

Geometry