2015 Niner Bikes ROS 9 Base

	Small	Medium	Large	XL
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, C-C	394mm	431mm	471mm	534mm
Top Tube Length, Effective/Horizontal Center	581mm	598mm	617mm	636mm
Head Tube Angle	67deg	67deg	67deg	67deg
Seat Tube Angle	73deg	73deg	73deg	73deg
Head Tube Length	99.1mm	109.2mm	124.5mm	144.8mm
Bottom Bracket Drop	48.3mm	48.3mm	48.3mm	48.3mm
Bottom Bracket Height	322.4mm	322.4mm	322.4mm	322.4mm
Chainstay Length	426.7mm	426.7mm	426.7mm	426.7mm
Chainstay Length Horizontal	424mm	424mm	424mm	424mm
Front-Center	683mm	701mm	722mm	743mm
Front-Center Horizontal	680.9mm	698.7mm	719mm	741.9mm
Wheelbase	1104.9mm	1122.7mm	1143mm	1165.9mm
Fork Offset/Rake	42mm	42mm	42mm	42mm
Fork Length (Axle-To-Crown)	385mm	551mm	385mm	385mm
Trail	111.7mm very high	111.7mm very high	111.7mm very high	111.7mm very high
Mechanical Trail	102.8mm	102.8mm	102.8mm	102.8mm
Wheel Flop	40.2mm	40.2mm	40.2mm	40.2mm
Standover Height	711.2mm	734.1mm	787.4mm	838.2mm
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	152.4mm 170 mm cranks	152.4mm 170 mm cranks	152.4mm 170 mm cranks	152.4mm 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.vitalmtb.com/product/guide/Bikes,3/Niner/ROS-9-with-X1,14873

Geometry