2019 Norther Cycles Lyon Base

	49/50cm	52cm	54cm	56cm	60cm	58cm
Stack	505.3mm	533.1mm	551.1mm	569mm	605.8mm	588.1mm
Reach	384.1mm	383.9mm	380.8mm	386mm	384.6mm	390.2mm
Stack to Reach Ratio	1.32:1	1.39:1	1.45:1	1.47:1	1.57:1	1.51:1
Seat Tube Length, C-C	490mm	520mm	540mm	560mm	600mm	580mm
Top Tube Length, Effective/Horizontal Center	530.3mm	538mm	545mm	560mm	575mm	570mm
Top Tube Length, Actual C-C	530mm	538mm	545mm	560mm	575mm	570mm
Top Tube Slope	0.1deg	0deg	0deg	0deg	0deg	0deg
Head Tube Angle	72deg	72deg	72deg	73deg	73.5deg	73deg
Seat Tube Angle	74deg	74deg	73.5deg	73deg	72.5deg	73deg
Bottom Bracket Drop	71mm	71mm	71mm	71mm	71mm	71mm
Bottom Bracket Height	263mm	263mm	263mm	263mm	263mm	263mm
Chainstay Length	440mm	440mm	440mm	440mm	440mm	440mm
Chainstay Length Horizontal	434.2mm	434.2mm	434.2mm	434.2mm	434.2mm	434.2mm
Front-Center	605.1mm	611.8mm	612.4mm	613.5mm	618.1mm	623.5mm
Front-Center Horizontal	601mm	607.6mm	608.3mm	609.4mm	614mm	619.4mm
Wheelbase	1035.2mm	1041.9mm	1042.5mm	1043.6mm	1048.2mm	1053.6mm
Fork Offset/Rake	72mm	70mm	68mm	68mm	68mm	68mm
Trail	32.8mm low	34.9mm low	37mm low	31mm low	28mm very low	31mm low
Mechanical Trail	31.2mm	33.2mm	35.2mm	29.7mm	26.9mm	29.7mm
Wheel Flop	9.6mm	10.3mm	10.9mm	8.7mm	7.6mm	8.7mm
Standover Height	750mm	780mm	790mm	820mm	860mm	840mm
Tire to Pedal Spindle	101.1mm 170 mm cranks	107.8mm 170 mm cranks	108.4mm 170 mm cranks	109.5mm 170 mm cranks	114.1mm 170 mm cranks	119.5mm 170 mm cranks
Pedal Spindle to Ground Clearance	93mm 170 mm cranks	93mm 170 mm cranks	93mm 170 mm cranks	93mm 170 mm cranks	93mm 170 mm cranks	93mm 170 mm cranks

	49/50cm	52cm	54cm	56cm	60cm	58cm
Wheel Size	650B/27.5 in 584 mm BSD	650B/27.5 in 584 mm BSD	650B/27.5 in 584 mm BSD	650B/27.5 in 584 mm BSD	650B/27.5 in 584 mm BSD	650B/27.5 in 584 mm BSD
Tire Width	42mm	42mm	42mm	42mm	42mm	42mm
Tire Outer Diameter	668mm	668mm	668mm	668mm	668mm	668mm
Bike Length with Tires	1703.2mm	1709.9mm	1710.5mm	1711.6mm	1716.2mm	1721.6mm

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.northercycles.com/sizes-geometry

Geometry